Steam Plants

Steam Plants
ABS

VER

250034

3

255800

265401

265201

2

2

3

252107

4

250147

1

251313

1

Steam Plants

Question
When the boiling temperature of a
steam boiler is increased, which of the
following effects will occur with relation
to the pressure and the specific volume
of the steam?
46 CFR requires that __________.

Choice A
Choice B
The steam pressure The steam pressure
and specific volume will increase and the
will remain constant. specific volume will
remain constant.

Choice C
The steam pressure
will remain constant
and the specific
volume will increase.

the OCMI be notified
of repairs to boilers
and unfired pressure
vessels

the fuel burned in
boilers of tankships
shall have a flash
point of not less than
140°F

a half-pint sample of all of the above
each load of fuel be
drawn and sealed at
the time of supply
and preserved until
that fuel is exhausted

amount of cooling
water to the
condenser is
excessive
discharge pressure
of a turbine driven
pump is excessive
II only

gland seal leak off
pressure is too high

A back pressure trip on a ship's service lubricating oil
turbo-generator functions to trip the
pressure is too low
turbine under what circumstance?
A back pressure trip on an auxiliary
oil pressure is too
turbo generator functions to secure the low
device if the __________.
A badly warped boiler water tube can be I only
reworked and bent back into shape by
__________.

gland seal leak off
pressure is too high
Both I and II

Choice D
The steam pressure
will increase and the
specific volume will
decrease.

Illustration

amount of cooling
water to the
condenser is
insufficient
exhaust pressure
rises above a preset
limit
Neither I nor II

I. heating it with a torch and reforming it
with a soft mallet
II. cold pressing it back into shape with
a hydraulic jack
A basic comparison can be made
main tube bank
steam lane
air cooler section
hot well
between a low pressure evaporator
operation and a main condenser with
regards to the removal of noncondensable gases. The vacuum drag
line for the main condenser is
specifically connected in which area?
A boiler accumulation test is used to
lifting pressure of the total relieving
steam generating
blow down pressure
measure the __________.
boiler safety valves capacity of the boiler capacity of the boiler of the boiler
safety valves

1

SP091813

ABS

251203

VER

5

251410

3

253401

4

253400

1

251200

5

256345

3

251102

1

251102

2

257002

1

Steam Plants

Question
A boiler desuperheater is installed in
high pressure boilers to __________.

Choice A

Choice B
II only

Choice C
Both I and II

Choice D
Neither I nor II

temperature of the
stack gas is low
enough to reach dew
point
A boiler feed stop-check valve would be boiler water drum
located at the __________.
A boiler feed stop-valve must be
between the feed
mounted __________.
check valve and the
boiler drum
A boiler fitting used to protect the
reducing station
superheater and to provide reduced
temperature steam for use by
auxiliaries is the __________.
A boiler has a steam delivery capacity the boiler may be
of 100,000 pounds per hour, and is
operated down to
equipped with four steam atomizing
25,000 pounds per
burners. If the load range of the
hour without
burners is 4 to 1, this means that
securing any burners
__________.
A boiler internal feed pipe is perforated provide positive flow
to __________.
to the downcomers

superheater outlet
temperature is too
high

DC heater outlet
temperature is too
high

main turbine is
operating at half
power

first stage feed water
heater outlet
between the feed
pump and the feed
check valve
feed water injector

DC heater outlet

economizer inlet

the boiler may be
operated down to
25,000 pounds per
hour only after three
burners are secured

if two burners are
operating, steam
output will be a
minimum of 50,000
pounds per hour

all four burners
combined can supply
up to 400,000
pounds of steam per
hour

create a slight
turbulence in the
steam drum
A boiler internal feed pipe is perforated provide positive
distribute the feed
to __________.
downward circulation water throughout the
at high loads
steam drum

distribute water
evenly throughout
the steam drum
reduce back
pressure in the feed
water piping

reduce the weight of
the steam drum
internals
reduce the overall
weight of the drum
internals

A boiler is to be secured in port. After immediately after
the burners have been secured, the
carrying out the
forced draft fan and air registers should former procedures
be secured __________.

after any oil on the
furnace floor has
been burned off and
cleared of
combustion gases

after 30 minutes has
elapsed, after
carrying out these
procedures

after at least 1 hour
has elapsed, after
carrying out these
securing procedures

I only

I. maintain flow through the
superheater
II. raise the steam temperature in the
steam drum
A boiler economizer should be
bypassed whenever the _______.

2

Illustration

upstream of the feed at or near the engine
water regulator
room operating
platform
desuperheater
dry pipe

SP091813

ABS

VER

251310

1

259771

250707

259120

259240

1

2

2

2

Steam Plants

Question
Choice A
A boiler safety valve must be capable of remaining open until
__________.
all pressure in the
steam drum is
relieved
A boiler superheater safety valve is set 450 psi (3102 kPa)
to lift at 450 psi (3102 kPa). Coast
Guard Regulations (46 CFR) require
that if there is a pressure drop of 10 psi
(69 kPa) across the superheater, the
drum safety valve should set to lift at a
pressure of __________.

Choice B
Choice C
remaining open until opening gradually
a preset pressure
above a designated
drop occurs
pressure
455 psi (3137 kPa)

460 psi (3171 kPa)

Choice D
closing with a
chattering motion to
free scale deposits
from the seats
465 psi (3206 kPa)

A boiler superheater support tube
direction of flow of
metals from which
differs from a standard generating tube the steam and water they are fabricated
in that the __________.
mixtures differ
differ

outside diameters
method of heat
and wall thicknesses transfer in the tube
differ
differs

A boiler water sample being collected
for analysis should be circulated
through a cooling coil because
_________.

it reduces the
amount of
suspended matter
that frequently finds
its way into the dead
end lines

the cool sample has
a higher conductivity
measurement and
the total dissolved
solids in the water
are easier to identify

the degree of acidity
as measured on the
pH recorder is
amplified by cool
water temperatures

24 ppm

36 ppm

48 ppm

this keeps the water
from flashing into
steam as it is drawn
from the higher
pressure of the boiler
into atmospheric
conditions

A boiler with a water capacity of 10
12 ppm
tons, generates steam at the rate of 30
tons per hour. If the feed water
concentration of solids was initially 0.5
PPM, and will increase at a rate of 1.5
ppm every hour, what would be the
increase in the feed water concentration
of solids after 24 hours?

3

Illustration

SP091813

ABS

VER

259240

1

263300

2

263300

4

258004

1

258802

4

268411

1

267826

2

267826

1

251403

1

Steam Plants

Question
Choice A
A boiler with a water capacity of 10
12 ppm
tons, generates steam at the rate of 30
tons per hour. If the feed water quality
is 0.5 ppm, the concentration of solids
will increase 1.5 ppm every hour. What
would be the increase in the
concentration of solids within 24 hours?

Choice B
24 ppm

Choice C
36 ppm

Choice D
48 ppm

A bridge gage is normally used to
determine turbine __________.
A bridge gage is used to measure
__________.
A burner atomizer improperly positioned
in the distance piece, may cause
__________.

bearing oil clearance diaphragm tip
clearance
blade tip leakage
rotor bearing wear
oil impingement on
furnace walls

slag formation on the erosion of the screen the ends of the
screen tubes
tube baffles
flame, farthest from
the atomizers, to be
a yellowish orange,
or golden shade

A cause of high superheater outlet
temperature is _________,

high feed water
temperature

low feed water
temperature

A centrifugal oil purifier should be shut
down if the __________.

presence of oil is
indicated in the
gravity tank bull'seye
Fuel oil

observation cover
clamp needs
tightening

A centrifuge should satisfactorily
remove which of the listed substances
from lube oil?
A centrifuge will satisfactorily remove
which of the listed substances from lube
oil?
A check valve is located between the
economizer and the steam drum to
__________.

blade axial clearance bearing wear
axial clearances

thrust bearing wear

excessive fuel oil
temperature at the
settlers
purifier is vibrating
badly

insufficient excess
air

Gasoline

Water

Diesel fuel

Diesel fuel

Gasoline

Fuel oil

Carbon particles

assure a positive
feed water flow
through the
economizer

assure a positive
feed water flow to
the steam drum

prevent the feed
prevent steam and
pump from becoming water flow reversal
vapor bound
from the drum
should an
economizer casualty
occur

4

Illustration

trapped water is
discharged from the
overflow line

SP091813

ABS

VER

256305

2

268404

256800

1

1

256800

2

269121

1

255305

263014

1

2

254207

3

266401

1

250163

2

Steam Plants

Question
A chemical based analysis of boiler
stack gases is taken to __________.

Choice A
determine the
volume of the SO2
products of
combustion

Choice B
Choice C
Choice D
estimate the amount estimate the BTU
measure the
of noncombustible
content of a quantity percentage volume
solids present in fuel of fuel oil
of CO2
oil

A cloudy or milky appearing lube oil
sample, taken from the main lubricating
oil system could be caused by
__________.
A combustion control system
diaphragm type air flow transmitter
receives its high pressure signal from
the boiler __________.
A combustion control system,
diaphragm-type, air volume regulator
receives its low pressure signal from
the boiler __________.
A common cause of the Babbitt linings
cracking in a turbine journal bearing is
from ________.
A common gas dissolved in water
contributing to the greatest amount of
corrosion in a condensate system is
__________.
A common method of preheating main
turbine lube oil prior to rolling over the
main unit would be to ________.

insufficient cooling
water to the lube oil
cooler

excessive cooling
water to the lube oil
cooler

insufficient gland
sealing steam

excessive gland
sealing steam

fan discharge

windbox

furnace

smoke box

windbox

casing

furnace

smoke pipe

A condensate recirculating line is
provided to the main condenser in a
closed feed water system to
__________.
A constant speed hydraulic governor
would more than likely be installed on a
__________.
A contaminated steam generator is
used to produce saturated vapor from
collected __________.

prolonged operation prolonged operation vibration generated
at low speed
at full speed
by the rotor

excessive thrust
bearing wear

carbon dioxide

hydrogen

carbon monoxide

nitrogen

run both the lube oil
pumps
simultaneously

operate the lube oil
purifier on the main
lube oil sump

slightly increase
bypass the lube oil
gland sealing steam gravity tank
pressure

prevent excessively
cooled distillate from
entering the DC
heater
turbo generator

provide adequate
cooling water to the
air ejector inter and
after condensers
main propulsion
turbine

assure a positive
flow through the
main feed pump

prevent flashing in
the main feed pump

main feed pump

main condensate
pump

bilge water

sanitary water

fuel oil heating return condenser cooling
drains
water

5

Illustration

SP091813

ABS

VER

259263

1

250701

5

261231

2

250401

2

250401

1

250401

3

254306

1

255500

267811

259181

2

1

2

Steam Plants

Question
A continuous blow is used to
__________.

Choice A
regulate the density
or salinity of boiler
water
generator tubes

A convection type superheater in a Dtype boiler is protected from radiant
heat by __________.
A convergent-divergent nozzle functions reverse steam flow
to __________.
direction

A corbel in the furnace of a water-tube
boiler is a __________.
A corbel in the furnace of a water-tube
boiler is a fillet of plastic refractory used
as a __________.
A corbel is used in a boiler furnace to
__________.
A decrease in condenser vacuum is
found to be caused by a loss of the air
ejector loop seal. To reestablish the
loop seal, you should __________.
A desirable property of boiler fuel oil is
__________.

preformed burner
arch section
means of excluding
slag from the joints
at the furnace floor,
walls, and corners
protect the
expansion joints
crack open the
recirculating line
from the DC heater
to the condenser hot
well
low carbon content
per pound of fuel

Choice B
remove scum from
the surface of boiler
water
convection currents

Choice C
permit air to escape
while raising steam
in a cold boiler
control
desuperheaters

control turbulent
steam expansion

decrease steam
decrease the specific
velocity and increase volume of steam
steam pressure

fillet of plastic
refractory
preformed burner
arch section

formation of soot on
furnace floor
foundation for
refractory anchor
bolts

type of refractory
anchor bolt
set of gas baffles in
the screen tubes

reduce gas
turbulence
close in on the
recirculating line
from the DC heater
to the condenser hot
well
high sulphur content
for complete
combustion

direct the flow of
gases
bypass the regulating
valve in the
condensate
recirculating line until
the loop refills
high BTU content per
pound of fuel

contain the furnace
heat
close the condenser
loop seal valve until
the loop refills and
reopen slowly

A disk-type centrifuge is set up for
the speed of the
continuous use on the main turbine lube centrifuge must be
oil system. In order to batch centrifuge increased
a small quantity of diesel oil from a
storage tank, __________.

another centrifuge
the number of
should be used to
conical disks must
avoid the possibility be increased
of contaminating the
main lube oil system

A dissolved oxygen concentration of 8.0 8 lbs of oxygen
ppm represents __________.
dissolved in
1,000,000 tons of
water

8 tons of oxygen
dissolved in
1,000,000 pounds of
water

6

Choice D
remove sludge from
the bottom of the
water drum
water screen tubes

Illustration

low residual acid
after combustion

the feed temperature
must be decreased
to 170°F

8 ounces of oxygen 80 ounces of oxygen
dissolved in
dissolved in 100,000
1,000,000 ounces of ounces of water
water

SP091813

ABS

VER

256810

2

250502

Question
Choice A
Choice B
Choice C
A flame scanner installed in modern
monitor the intensity monitor the stack for regulate burner fuel
boiler combustion control systems,
of the burner flame soot fires
oil pressure
functions to __________.
A flue gas air heater, when installed in a I only
II only
Both I and II
boiler would be accompanied by the
operating characteristic(s) of
__________.

256305

251604

269710

Illustration

Neither I nor II

8
I. higher uptake temperatures than a
boiler without an air heater
II. lower corrosion rates in the uptakes
and economizer
A flue gas air heater, when installed in a I only
boiler, would be accompanied by the
operating characteristic(s) of
__________.

250502

Choice D
regulate the air flow
to the furnace

II only

Both I and II

Neither I nor II

correct fuel/air ratio
for efficient
combustion
loose and should be
repaired

carbon content of the specific heat of
fuel being burned
combustion products

II only

Both I and II

7

1

1

4

I. higher furnace temperatures than a
boiler without an air heater
II. greater heat absorption per pound of
fuel
A flue gas analysis is performed to
percentage of
determine the __________.
nitrogen by volume
A furnace wall in which there are open
spaces around the brick as a result of
firebrick shrinkage, is __________.

normal and need
only be cleaned

A gravity type lube oil system for a
I only
steam vessel will have a remote
pressure sensing device installed on the
main lube oil header of the main turbine
unit to enable the watch engineer to
__________.

cracked and must be spalled and must be
patched
replaced

Neither I nor II

I. determine if there is a normal level of
lube oil in the gravity tank
II. be certain that the bearings are being
adequately lubricated

Steam Plants

7

SP091813

ABS

VER

253000

1

258221

1

258215

2

254408

1

258504

1

252107

268815

259430

250250

1

1

Question
Choice A
A heavy accumulation of soot on the
low superheater
fireside of the superheater can cause a outlet temperature
__________.
because of the
insulating effect of
soot
A high carbon monoxide content in the complete
flue gases of a boiler indicates
combustion
__________.
A high percentage of carbon dioxide in carbonized burner
boiler flue gases indicates __________. tips

Choice B
high superheater
outlet temperature
because of reduced
steam flow

A high water level in a deaerating feed
heater will cause the automatic dump
valve to drain condensate to the
__________.
A higher than normal stack gas
temperature could indicate
__________.
A hole should be made in the sagged
tube occurring in a water-tube boiler,
prior to plugging the tube to prevent a
__________.
A Kingsbury, or pivot shoe type thrust
bearing, can bear much greater loads
per square inch of working surface than
can parallel surface bearings because
provisions are made in the Kingsbury
bearing __________.

atmospheric drain
tank

reserve feed tank

dirty firesides or
watersides

inner or outer casing eroded water screen defects in burner
leakage
tube walls
cone refractory

pressure buildup in
the tube

quick burnout of the
tube

complete sagging
failure of the tube

crack failure of the
tube

for adjusting the filler
piece thickness
behind the pivotalshoes to give a more
accurate fit

for automatically
adjusting clearances
to the correct value
when wear occurs

for the shoes to tilt
slightly, thereby
allowing the
formation of a wedge
shaped oil film under
a thrust load

to allow the leveling
plates to pivot on the
collar when thrust
loads are applied

A leak in a desuperheater could be
indicated by an __________.

increased boiler
water compound
level in the boiler
with the affected
desuperheater
an increase in fuel oil
temperature

increased
concentration of
dissolved oxygen in
boiler water

inability to maintain
control of boiler
water suspended
solids

inability to maintain
proper boiler water
pH or phosphate
levels

observing oil on the
contaminated
evaporator steam
coils

the presence of fuel
oil in the inspection
tank

the sputtering of
burners in the boilers

1

5

Steam Plants

A leak in a heating coil in a fuel oil
storage tank should be detected
quickly by __________.

Choice C
high superheater
inlet temperature
because of
decreased heat
transfer
too much excess air incomplete
combustion

Choice D
high superheater
outlet temperature
because of gas
laning

Illustration

a high carbon
content fuel

too much excess air contaminated fuel oil nearly complete
combustion of fuel oil

8

auxiliary condenser

main condenser

SP091813

ABS

VER

250250

6

259430

2

251204

1

257805

1

258210

5

258210

1

268404

2

268404

3

254117

1

Steam Plants

Question
A leak in the heating coils of a fuel oil
heater will first show up as
__________.
A leak in the internal desuperheater
located in one of the two main boilers
on a ship can be indicated by a/an
__________.

Choice A
water in the fuel oil
supply

Choice B
oil in the drain
inspection tank

Choice C
Choice D
sputtering and
an intense white
hissing furnace fires furnace flame

decrease in the
amount of feed
treatment chemicals
remaining in that
boiler

increase in the
amount of feed
treatment chemicals
contained in that
boiler

increase in the
amount of time
necessary for
priming that boiler

A leaking boiler desuperheater may be
indicated by a/an __________.
I. gradual, but continual rise in
phosphate readings in only one boiler
II. inability to maintain normal working
pressure in the auxiliary steam system

I only

II only

decrease in the
amount of feed
treatment required
for proper water
chemistry of that
boiler
Both I and II

A leaky fuel oil heater relief valve could
be indicated by an increase in the
__________.
A light brown haze issuing from the
boiler smoke stack generally indicates
__________.
A lower than normal boiler stack gas
temperature usually indicates
__________.
A lube oil sample is taken from the main
engine lube oil system and visually
inspected. Which of the following would
indicate water contamination?

sludge tank level

discharge piping
temperature

contaminated drain
tank level

fuel oil service pump
pressure

dirty fuel atomizers

good fuel
combustion

too much fuel
pressure

a high firing rate

dirty firesides

dirty watersides

fuel high sulfur
content

incomplete
combustion

A milky-white color

A clear, amber color A black color

A lube oil sample taken from the main
engine lube oil system has a dark
yellow opaque color. This is the result
of ____________ .
A main condenser utilizing a scoop for
the circulation of seawater must be
constructed as a __________.

water contamination mixing oils of two
widely different
viscosities

overheating

aeration

two-pass heat
exchanger

counter flow heat
exchanger

parallel flow heat
exchanger

single-pass heat
exchanger

9

Illustration

Neither I nor II

A reddish-orange
color

SP091813

ABS

VER

253515

1

255207

256308

266405

1

1

1

250306

1

261227

3

251305

1

256809

Question
A major difference between the two
element and the three element feed
water regulator control systems, is that
a three element system will additionally
measure and incorporate the
__________.
A malfunction in the DC heater is
indicated by __________.

1

Steam Plants

A mechanical carbon dioxide recorder
operates by detecting the difference
between air and the __________.
A motor driven synchronizing device,
figure "D" shown in the illustration,
operated from the generator
switchboard, initiates fine adjustments
to the steam turbine speed by directly
__________.
A natural circulation water-tube boiler,
with one or more water drums, would be
classified as a/an __________.

Choice A
drum water level to
the feed water
regulator

Choice B
Choice C
steam flow to the
feed water flow as
feed water regulator sensed variable

the boiler requiring
excessive amounts
of oxygen
scavenging
chemicals
color of boiler flue
gases

water and steam
entering the DC
heater at different
temperatures

condensate coming air flowing from vent
in contact with steam condenser vent
inside the heater

temperature of the
flue gases

soot content of the
flue gases

raising or lowering
the nozzle block
lifting beam

changing the vertical increasing or
varying the pivot rod
location of the pilot
decreasing operating stroke length on the
valve bushing
spring pressure
governor weight
eccentric pad

accelerated natural
circulation boiler

controlled circulation header-type boiler
boiler

drum-type boiler

adjusting ring is set
too low

guide the steam
through the fixed
blades
blow down is set too
low

convert the steam's
kinetic energy to
thermal energy
spring compression
is insufficient

light emitted from the
back wall
incandescent
brickwork

light emitted from the the orange portion of the blue portion of
front wall
the flame spectrum the flame spectrum
incandescent
brickwork

A nozzle in an impulse turbine functions reverse steam flow
to __________.
direction
A nozzle reaction safety valve will lift at
a pressure lower than required if the
__________.
A photoelectric cell is installed in an oil
fired boiler safeguard system to
introduce proper resistance values to
the electronic control circuit. This
device is primarily sensitive to
__________.

10

convert the steam's
thermal energy to
kinetic energy
nozzle ring has come
adrift

Choice D
fuel oil flow to the
feed water regulator

Illustration

specific weight of the
flue gases

SE-0009

SP091813

ABS

VER

266004

2

253509

1

268402

1

289525

258200

261201

261211

256354

259403

1

3

1

1

7

3

Steam Plants

Question
A pilot valve and servomotor are utilized
in mechanical-hydraulic governing
systems on a turbo generator unit in
order to __________.

Choice A
Choice B
Choice C
provide sufficient
provide a means of allow parallel
force to operate
maintaining constant operation with zero
large steam lifting
output voltage
speed droop
beam control valves

Choice D
constant load on the
turbine unit

A pneumatic dual element, main
propulsion, boiler feed water regulating
system commonly used aboard ship
utilizes __________.
A poorly cleaned lube oil purifier bowl
may result in __________.

two-position
differential action

on off reset action

A power failure in the hydraulic system
of a compact type steering gear would
cause the rudder to __________.

swing 35° right or left remain locked in its
last position

move to the midship jam against the
position
rudder emergency
automatically
stops

A practical consideration to allow for
when operating a boiler at low load with
regard to heat absorption is the
requirement to __________.
A pressure drop occurs across both the
moving and fixed blades of a reaction
turbine as a result of the __________.

maintain uptake gas maintain an excess
temperature above of CO
the dew point

prevent excess air
density

proportional action

proportional plus
reset action

insufficient oil supply improper separation excessive lube oil
to the gravity tank
consumption

protect the safety
valves from
excessive
temperature
reversing blades
conversion of the
interstage
causing a velocity
thermal energy to
diaphragms creating
drop with resultant
pressure energy
a nozzle effect in the
pressure drop
always resulting in a steam flow
pressure drop
A pressure-velocity compounded
velocity
several rows of
two or more stages
impulse turbine consists of
compounding with
moving blades
of velocity
__________.
reaction pressure
attached to
compounding
compounding
diaphragms
A primary function of burner atomization maintain a constantly prevent overheating maintain a constantly
steam is to __________.
high fuel pressure
of the air register
high fuel temperature
when secured
A rapid fluctuation of the superheater
outlet temperature on a steady
steaming boiler could indicate
__________.

water carryover into
the superheater

excessive steam
flow through the
superheater

11

Illustration

excessive water
discharge rate

moving and fixed
blades being shaped
to act as nozzles

two or more rows of
nozzles in which no
pressure drop exists

impart a swirling
motion in the oil
spray for efficient
combustion
leaks in the
failure of the internal
superheater element auxiliary
desuperheater

SP091813

ABS

VER

250502

4

261407

4

252107

7

254300

1

259121

3

256354

6

250411

1

Steam Plants

Question
Choice A
A regenerative type air heater should be prevent chipping of
bypassed at low load in order to
the ceramic coating
__________.
A rotor position micrometer on a main
propulsion reaction turbine measures
rotor __________.
A ruptured boiler tube should be
removed by __________.

Choice B
prevent
condensation in the
steam baffling

radial position
radial position
relative to the casing relative to the
micrometer
I only
II only

Choice C
avoid excessive
cooling and
condensation of the
exhaust gases
axial position relative
to the casing

Choice D
maintain a positive
seal on the
replaceable basket

Both I and II

Neither I nor II

evaporator brine
suction line
water sample pH
reaches 10.5

low pressure turbine
casing drain
entire concentration
of chlorides have
been neutralized

Illustration

axial position relative
to the micrometer

I. splitting the remaining tube sections
with a safety ripping chisel
II. cutting out most of the tube and then
allowing the remaining portion to
disintegrate as the boiler is normally
fired
A salinity indicator cell is located in the
__________.
A sample of boiler water can be
chemically tested for alkalinity by initially
adding a few drops of phenolphthalein
and then slowly titrating the water
sample until the __________.

seawater side of the
main condenser
sample color
changes from clear
to pink

A secondary function of atomization
steam in a fuel oil burner is to
__________.

maintain a constantly prevent overheating
high fuel pressure
of the atomizer when
not firing during
maneuvering
support the boiler
direct the flow of
casing
combustion gases

A secondary function of the refractory
installed in a marine boiler is to
__________.

main condenser hot
well
sample color
changes from pink to
clear

12

maintain a constantly vary the viscosity of
high fuel temperature the fuel oil

maintain air flow
through the burner
diffuser

support the burner
distance piece

SP091813

ABS

VER

266407

1

254204

2

Question
Choice A
A sequential lift, nozzle valve control bar A lifting beam
on a turbo generator, utilizes which of
mechanism engages
the following operating principles?
nozzle valve stems
of varying lengths.

Choice B
A hydraulic piston
raises or lowers
groups of valves
according to
pressure received
from a governor.

Choice C
A hydraulic piston
raises or lowers
individual valves
according to
pressure received
from a governor.

Illustration
Choice D
A servomotor,
mechanically
connected to nozzle
valve hand wheels,
opens or closes the
valves in accordance
with the type of
electrical signal
received.

A set of first and second stage air
I only
ejectors are used with a large sea water
cooled steam condenser. If the first
stage air ejector is not in operation
__________.

II only

Both I and II

Neither I nor II

rotating the same
direction as the lowspeed pinion on the
low pressure side.

turning the same
rotation of the highspeed pinion on the
low pressure side.

turning opposite to
the rotation of the
high-speed gear on
the low pressure
side.

turning counter
clockwise as viewed
from the aft end of
the reduction gear.

rotating in the
opposite direction as
the low-speed pinion
on the low pressure
side as viewed from
the aft end of the
reduction gear.

turning clockwise as
viewed from the
forward end of the
reduction gear.

turning opposite to
the rotation of the
high-speed gear on
the low pressure
side.

turning clockwise as
viewed from the aft
end of the reduction
gear.

I. vacuum can not be established
II. maximum operating vacuum can not
be maintained

260202

260202

1

2

Steam Plants

A ship is equipped with the illustrated
turbine gear set and a right hand turning
propeller. When steam is admitted to
the astern element, with sternway on,
the high-speed gear on the high
pressure side is__________.
A ship is equipped with the illustrated
turbine gear set and a right hand turning
propeller. When steam is admitted to
the astern element, with sternway on,
the high-speed gear on the high
pressure side is__________.

13

SE-0016

SE-0016

SP091813

ABS

VER

260202

3

253511

1

254510

259431

2

1

259180

1

256600

4

265202

254218

1

1

Steam Plants

Question
A ship is equipped with the illustrated
turbine gear set and a right hand turning
propeller. When steam is admitted to
the astern element, with sternway on,
the high-speed pinion on the high
pressure side is__________.

Choice A
rotating in the same
direction as the lowspeed pinion on the
low pressure side.

Choice B
turning counter
clockwise as viewed
from the aft end of
the reduction gear.

Choice C
turning the same
direction as the highspeed gear on the
low pressure side.

Choice D
turning the opposite
direction as the low
speed reduction
gear.

A single element boiler feed water
regulating system used aboard ship
utilizes __________.
A slight vacuum is maintained in the
shell of the first stage heater shown in
the illustration. The primary reason for
the vacuum is to __________.

two position
differential gap
action
provide a low
pressure area to
guarantee feed water
flow to the heater

proportional action

proportional plus
reset action

proportional plus
reset plus rate action

force the use of the
main condenser as
the drain cooler

avoid the necessity
of having to use the
condensate pumps

immediate drop in
boiler water level

inability to maintain
required boiler water
chemistry

maintain a positive
flow of steam as
supplied by the main
engine LP bleed
system
A small leak in the desuperheater of an immediate increase immediate decrease
operating boiler could cause an
in superheater outlet in superheater outlet
__________.
pressure
temperature
A sodium sulfite test is performed on a
boiler water sample to determine if
__________.
A solenoid valve in the boiler fuel oil
supply line will close when the
__________.
A steam driven 750 KW turbo generator
has a rated speed of 1200 RPM. The
over speed setting for this unit must not
exceed __________.
A steam plant is operating at 100%
power when the atmospheric drain tank
runs dry allowing a large air leakage
into the main condenser. Which of the
following will occur as a result of this air
leakage?

there is any excess
sulfite present

the pH of the boiler
water is within the
prescribed limits

the dissolved oxygen
in the boiler water is
within tolerable
limits
main turbine throttle boiler is operating at forced draft fan fails
valve is closed
low pressures

the hardness factor
is maintained as
close to zero as
possible
fuel oil temperature
exceeds 150°F

1320 RPM

1380 RPM

1500 RPM

Decreased
condensate
temperature

Decreased pressure Decreased suction
in the main
pressure at the
condenser
condensate pump

14

1440 RPM

Illustration

SE-0016

SG-0025

Decreased
condenser cooling
water outlet
temperature

SP091813

ABS

VER

269856

3

255310

255310

269856

254601

2

1

4

2

Steam Plants

Question
A steam propelled tank ship is
operating at sea and despite
troubleshooting the system by all the
vessel's engineers, the transfer of fuel
to the settler has not been possible and
the settler will be empty in a few
minutes. As the watch engineer, your
NEXT step should be to __________.

Choice C
line up the diesel
cold start system

Illustration
Choice D
stop the main engine
and secure the
generator

II only

Both I and II

Neither I nor II

II only

Both I and II

Neither I nor II

activate the
"engineer needs
assistance" alarm

line up the diesel
cold start system

warm up the
emergency
generator

repeat all the steps
that have been taken
to determine the
cause of the problem

operating lever
stroke

whistle valve travel

position of the back
cover

number of
diaphragms

Choice A
Choice B
repeat all the steps call out other
that have been taken engineers for
to determine the
assistance
cause of the problem

A steam supplied heat exchanger will
I only
fail to maintain the designed quantity of
heated liquid output if the
__________.
I. steam side shell absolute pressure is
decreased
II. heat exchanger drain is leaking
A steam supplied heat exchanger will
I only
fail to maintain the designed quantity of
heated liquid output if the
__________.
I. steam supply absolute pressure is
increased
II. tubes are leaking
A steam vessel is operating at sea and
despite troubleshooting the system by
all the vessel's engineers, the transfer
of fuel to the settler has not been
possible and the settler will be empty in
a few minutes. As the watch engineer,
your NEXT step should be to
__________.
A strong, well defined sound developed
by the steam whistle, shown in the
illustration, is obtained by adjusting the
__________.

15

GS-0099

SP091813

ABS

VER

259500

1

258813

2

259180

3

250252

1

259090

2

210011

253510

260206

Question
A sudden increase in boiler water
hardness or chloride content could
indicate __________.
A sudden unexplainable drop has
occurred in the outlet temperature of an
uncontrolled interdeck superheater on a
boiler carrying a higher than normal
TDS (total dissolved solids) reading.
Which of the actions listed is required?

Choice A
Choice B
a leaking condenser evaporator priming
tube
Immediate increase
in the firing rate.

Reduction in the
forced draft fan
speed.

A sulfite test is conducted on boiler
water to check for __________.
A suspected leak in an operating fuel oil
heating coil is normally confirmed by
__________.
A test of boiler water for chloride
content indicates the amount of
__________.
A theoretical engine cycle is a process
that _________.

nitrates

sulfates

phosphates

checking the pH of
heating coil returns

conducting a soap
test

conducting a blotter
spot test

suspended matter
present

dissolved gases
present

all of the above

A triple element, main propulsion, boiler two-position
feed water regulating system commonly differential gap
used aboard ship utilizes __________. action

proportional action

proportional plus
reset action

proportional plus
reset plus rate action

A turbine assembly in which steam
flows in series through a high pressure
turbine and then on to a low pressure
turbine, with both turbines driving a
common reduction gear through
separate shafts, is classified as
_________.

cross-compound

tandem-compound

tandem, double flow

takes place in the
combustor of the
engine

1

Steam Plants

dual series

16

Illustration

excess oxygen
scavenging agents
checking the drain
inspection tank

seawater
contamination
present
begins with certain
begins with certain
conditions,
conditions,
progresses through a progresses to a
series of additional steady state and
conditions and
stays there
returns to the original
conditions

1

1

Choice C
Choice D
bilge water leaking
all of the above
into the makeup feed
tanks
Lowering the steam Raising the feed
drum water level.
water temperature.

None of the above.

SP091813

ABS

VER

261209

1

253713

1

265201

1

266401

6

253504

1

253504

6

253504

4

253504

2

259093

1

254102

4

Steam Plants

Question
A turbine diaphragm functions to
__________.

Choice A
support moving
blades and
shrouding in an
impulse turbine
hand activating the
over speed trip

Choice B
Choice C
provide support for support the nozzles
interstage packing in and direct the flow of
a reaction turbine
steam in an impulse
turbine
A turbine-driven centrifugal feed pump
closing off the steam slowly closing the
used for boiler feed service should
via the excess
manual throttle
normally be stopped by __________.
pressure pump
governor
A turbo generator back pressure trip
insufficient
a steam inlet valve
an excessive
can be actuated as a result of
circulating water flow being partially open pressure drop
__________.
through the
through the turbine
condenser
A turbo-generator governing system
changes the position controls the opening controls the steam
maintains constant turbine speed by
of the turbine throttle or closing of turbine pressure in the
using a flyweight-actuated pilot valve to valve
nozzle valves in the steam chest
control hydraulic oil flow to a lifting
steam chest
beam operating cylinder, which in turn,
__________.
A two-element boiler feed water
steam flow and feed steam flow and drum drum water level and
regulator is controlled by __________. water flow
water level
feed water flow

Choice D
decrease steam
velocity in the
nozzles of an
impulse turbine
opening wide the
recirculating valve
and then manually
closing the throttle
excessively low
exhaust pressure

A two-element feed water regulator not
only responds to changes in water level,
but is also designed to react to
__________.
A two-element feed water regulator
reacts to changes in the steam drum
water level and the __________.
A two-element feed water regulator
responds directly to changes in
__________.
A unit of measure used to express the
chloride content of boiler water is
__________.
A vent line is provided on each water
box of the main condenser in order to
prevent __________.

regulates steam
back pressure

drum water level and
drum pressure

feed water flow

steam flow

fuel flow

steam pressure

steam flow from the
boiler

main feed pump
speed

water flow to the
boiler

signal from the flame
scanner

feed water flow to
the boiler

feed water pump
discharge pressure

DC heater water
level

steam flow from the
boiler

PPM

Micro-Farads

pH

Micro-Ohms

insufficient head
pressure being
developed on the
circulating pump
discharge

inadequate heat
transfer from
developing during
normal operation

Both A and B

Neither A nor B

17

Illustration

SP091813

ABS

254102

259361

250310

250310

259746

VER

3

1

5

4

1

Steam Plants

Question
A vent line is provided on each water
box of the main condenser in order to
prevent __________.

Choice A

Choice B
II only

I only

I. insufficient head pressure being
developed on the circulating pump
discharge
II. inadequate heat transfer from
developing due to air bound tubes
A water-tube boiler can be laid up either completely fill the
wet or dry. If it is to be laid up wet, you boiler with water,
should __________.
then blow down to
steaming level

Choice C
Both I and II

Choice D
Neither I nor II

completely fill the
drain and refill the
boiler with deaerated boiler each week
feed water and
maintain a slight
pressure
the water-tube boiler Both "A" and "B"
produces more
pounds of steam per
pound of boiler

drain and refill the
boiler when the pH
goes above 6

A water-tube type boiler is more
efficient than a fire-tube type boiler as
__________.

a water-tube boiler
requires less
maintenance

A water-tube type boiler when
compared to a fire-tube type boiler has
an advantage of __________.

I only

II only

Both I and II

Neither I nor II

All mountings shall
be opened up and
examined by a Coast
Guard inspector at
eight year intervals
after the initial
inspection.

All boiler mounting
studs or bolts shall
be removed for
examination by a
Coast Guard
inspector every 4
years after initial
inspection.

Boiler mountings
attached to boiler
nozzles must be
opened and
removed for
examination every 8
years.

Boiler mountings
attached directly to
the boiler plating by
screwed studs and
nuts shall be
removed and
examined every 10
years.

Illustration

Neither "A" or "B"

I. a water-tube boiler requiring less
chemical compounding
II. the fire-tube boiler providing a greater
amount of heat transfer to the water as
the hot gases pass through the tubes
According to 46 CFR Part 61, which of
the following statements is true
concerning the inspection of water-tube
boilers?

18

SP091813

ABS

VER

255801

2

259774

250149

259743

256511

1

3

4

1

Steam Plants

Question
According to 46 CFR Parts 59 and 35,
which of the following is true?

Choice A
The OCMI must be
notified of
emergency repairs to
boilers and unfired
pressure vessels.

Choice B
The fuel burned in
boilers of tankships
shall have a flash
point of not less than
120°F.

Choice C
Choice D
A one gallon sample All of the above.
of each load of fuel
oil shall be drawn
and sealed at the
time of supply and
preserved until that
fuel is exhausted.

According to 46 CFR, which of the
Expansion joints or
following statements is true concerning flexible pipe
main boiler safety valve escape piping? connections are
prohibited.

The piping shall be
led as near vertical
as possible to the
atmospheric drain
tank.

The piping should be All of the above.
supported and
installed so that no
stress is transmitted
to the valve body.

According to 46 CFR's, all oil-fired main controlled
propulsion boilers with automatic burner desuperheaters
safety control systems must be
provided with _______.

stack temperature
pyrostats

one flame detector
for each burner

one flame detector in
each furnace

According to 46 CFR's, steam piping
subject to main boiler pressure must be
hydrostatically tested at specified
intervals. Therefore, which of the
following statements is true?

The piping must be
tested at a pressure
and temperature
specified by a Coast
Guard marine
inspector.

The piping must be
tested at 1 1/2 times
working pressure
every 4 years.

Piping under 3
inches nominal pipe
size need not be
hydrostatically
tested.

The piping must be
tested at 2 times
maximum allowable
pressure every 4
years.

According to Coast Guard Regulations
(46 CFR) a 'oil fuel unit' is correctly
described by which of the following
statements?

The amount of heat
released by burning
a 'unit' amount of fuel
oil.

Equipment used for
the preparation of
fuel oil for delivery to
an oil fired boiler.

The amount of
thermal units
required to raise the
temperature to the
flash point in an
open cup tester.

The amount of
thermal units
necessary to cause a
liquefied flammable
gas to exceed a
certain Reid vapor
pressure.

19

Illustration

SP091813

ABS

VER

259753

3

259753

259789

259759

259747

259746

4

1

2

5

2

Steam Plants

Question
According to Coast Guard Regulations
(46 CFR), a 1200 psig maximum
allowable working pressure boiler, with
external blow off piping is required to
have the blow off piping withstand a
minimum of __________.
According to Coast Guard Regulations
(46 CFR), blow off piping external to a
boiler with a maximum allowable
working pressure of 600 psig must be
capable of withstanding a minimum
pressure of __________.
According to Coast Guard Regulations
(46 CFR), feed water nozzles shall be
fitted with sleeves, or have other
suitable means employed to reduce the
effects of temperature differentials on
all boilers designed for operating
pressures of __________.

Choice A
1200 psig

Choice B
1425 psig

Choice C
1500 psig

Choice D
1575 psig

600 psig

750 psig

825 psig

900 psig

Illustration

250 psig (1825 kPa) 300 psig (2169 kPa) 400 psig (2859 kPa) 600 psig (4238 kPa)
or over
or over
or over
or over

According to Coast Guard Regulations 206°F
(46 CFR), fusible plugs are not
permitted on auxiliary boilers where the
maximum steam temperature to which
they are exposed exceeds __________.

218°F

425°F

850°F

According to Coast Guard Regulations main propulsion
(46 CFR), periodic hydrostatic tests are boilers
required to be conducted without
exception on all __________.

auxiliary steam
piping

air receivers

all of the above

According to Coast Guard Regulations 3 years
(46 CFR), the studs and bolts on
marine boiler mountings must be
removed for examination at least every
__________.

4 years

5 years

10 years

20

SP091813

ABS

VER

259758

1

259747

255800

259759

259782

259787

259760

259735

6

1

1

1

1

1

2

Steam Plants

Question
Choice A
Choice B
According to Coast Guard Regulations Affected areas
Boiler should be
(46 CFR), what action should be taken should be built up by condemned.
if the metal thickness of a marine boiler welding.
is found to be thinner than original
specifications?

Choice C
Drum should be
renewed before the
next biennial
inspection.

Choice D
Working pressure
should be
recalculated.

According to Coast Guard Regulations 1 year
(46 CFR), what is the maximum time
interval for hydrostatically testing boilers
on a cargo vessel having water-tube
boilers?

2 years

5 years

8 years

According to Coast Guard Regulations
(46 CFR), what is the minimum flash
point of oil to be used as fuel for the
boilers?
According to Coast Guard Regulations
(46 CFR), what is the highest steam
temperature to which fusible plugs may
be exposed?
According to Coast Guard Regulations
(46 CFR), which of the following is
classified as a boiler mounting?

80°F (26.7°C)

110°F (43.3°C)

140°F (60.0°C)

150°F (65.6°C)

290°F

375°F

425°F

500°F

Main feed check
valve

Soot blower element Blow off valve

Escape piping drain
valve

According to Coast Guard Regulations
(46 CFR), which of the following is
permitted in boiler fuel oil service
system discharge piping?
According to Coast Guard Regulations
(46 CFR), which of the following steam
piping conditions, subjected to main
boiler pressure, is exempted from
hydrostatic testing?
According to Coast Guard Regulations,
boiler safety valves __________.

Screwed bonnet
valves of the union
bonnet type.

Pipe unions one inch Bushings made of
or greater in
seamless steel.
diameter.

Street ells made of
carbon steel.

All piping with a
nominal size of 3
inches or less.

All piping from the
main steam stop to
the throttle valve.

All piping equipped
with a safety or relief
valve.

shall not have valves will only be set and
on drain lines
sealed by the Chief
Engineer

21

All piping to the
ship's service
generators.

Illustration

will be provided with all of the above
a suitable lifting
device operated only
from the fire room

SP091813

ABS

VER

262008

1

250013

250012

250012

1

1

3

250013

3

262009

1

250420

250421

1

1

Steam Plants

Question
According to illustration SE-0019, piston
"F" in the gland seal regulator is moved
upward by ________.
According to the data given in
illustration SG-0026, which of the
following would be the physical state of
the fluid at a gage vacuum of 25.03
inches Hg, and 126.08 degrees
Fahrenheit?
According to the data given in
illustration SG-0026, which of the
following would be the physical state of
the fluid at a gage vacuum of 25.03
inches Hg, and 138.79 degrees
Fahrenheit?
According to the data given in
illustration SG-0026, which of the
following would be the physical state of
the fluid at a gage vacuum of 28.09
inches Hg, and 117.99 degrees
Fahrenheit?
According to the data given in
illustration SG-0026, which of the
following would be the physical state of
the fluid at a gage vacuum of 29.00
inches Hg, and 85.21 degrees
Fahrenheit?
According to the illustration (SE-0019),
bellows "I" in the gland seal regulator is
actuated by ________.
According to the illustration of a typical
boiler furnace rear wall, which item
number would best represent
"insulating block"?
According to the illustration of a typical
boiler furnace rear wall, which item
number would best represent
"insulating brick"?

Choice A
steam pressure

Choice B
control air

Choice C
lube oil pressure

Choice D
nitrogen

Illustration
SE-0019

Sub cooled liquid.

Saturated liquid.

Mixture of saturated Superheated vapor.
liquid and vapor.
SG-0026

Sub cooled liquid.

Saturated liquid.

Mixture of saturated Superheated vapor.
liquid and vapor.
SG-0026

Sub cooled liquid.

Saturated liquid.

Mixture of saturated Superheated vapor.
liquid and vapor.
SG-0026

Sub cooled liquid.

Saturated liquid.

Mixture of saturated Superheated vapor.
liquid and vapor.
SG-0026

gland seal steam
pressure

control air pressure

1

2

lube oil pressure

3

steam throttle
pressure

SE-0019

7
SG-0003

1

2

3

7
SG-0003

22

SP091813

ABS

VER

267208

2

Question
Choice A
According to the illustration of a typical 1
boiler furnace rear wall, which item
number would best represent "standard
fire brick"?
According to the illustration, what is the act as a final filter for
normal function of the component
oil entering a bearing
shown?

1

According to the illustration, what part
4
number identifies the "air door handle"?

6

256367
256366

1

1

3

9

4

256365

1

1

3

9

7

256368

1

According to the illustration, what part
number identifies the "air doors"?
According to the illustration, what part
number identifies the "diffuser"?
According to the illustration, what part
number identifies the "igniter"?
According to U. S. Coast Regulations
(46 CFR), water-tube boilers shall be
hydrostatically tested on passenger
vessels every __________.
According to U.S. Coast Guard
Regulations (46 CFR), which of the
following pumps is required to have a
pressure gage provided on the
discharge side of the pump?
Accumulation of fuel oil in the boiler
double casing could be caused by
__________.
Accumulation tests are conducted in
order to determine the __________.

2

3

7

9

year

2 .5 years

5 years

8 years

Fire pump

Boiler Feed pump

Fuel oil transfer
pump

All of the above

leaking fuel oil
strainers

dripping atomizers

high atomizing steam faulty steam
pressure
atomizer return traps

steam generating
capacity of an
individual boiler

steam relieving
capacity of safety
valves

maximum combined
oil consumption of all
oil burners installed
on a single boiler

250422

259747

1

9

256404

1

258015

2

251313

2

Steam Plants

Choice B
2

Choice C
3

Choice D

Illustration

7
SG-0003

indicate the
temperature and flow
of lube oil leaving a
turbine bearing

indicate the pressure
and flow of lube oil
entering a turbine
bearing

indicate the pressure
and temperature of
lube oil leaving a
turbine bearing

7

12

SE-0010

SG-0016

23

SG-0016
SG-0016
SG-0016

maximum combined
steam generating
capacity for all
propulsion boilers of
a single plant

SP091813

ABS

VER

250721

1

252107

3

257005

254801

263302

251609

2

2

1

1

263017

1

258402

1

258201

1

Steam Plants

Question
Advances in metallurgy and improved
methods of boiler tube fabrication has
led to lighter tubes with wall thicknesses
in the vicinity of 0.1 inches. A
characteristic of these thin walled tubes
is __________.
After a boiler generating tube has been
plugged, __________.

Choice A
low tube metal
temperatures

a hole should be
made in the
defective tube
After a boiler has been taken off the line purge all air from the
and is cooling, the air cock is opened to steam drum
__________.

Choice B
Choice C
decreased probability better heat transfer
of tube failure during characteristics
normal operating
conditions

Choice D
all of the above

the firing rate should the steam flow rate
be reduced
must be increased

all of the above

allow even cooling of guard against
the steam drum
entrapped gas
pockets in the
superheater
Absolute pressure
Absolute pressure
will decrease and hot will increase and hot
well temperature will well temperature will
increase.
decrease.

prevent the formation
of a vacuum within
the boiler

After being required to plug an
excessive number of leaking condenser
tubes on the main condenser, what
changes would you expect to observe
when returning to normal steam plant
sea speed operation?

Absolute pressure
and hot well
temperature will
increase.

After one year of operating the bearing
shown in the illustration, the reading
obtained at point "A" would always be
equal to the __________.
After patching refractory with plastic
firebrick, holes are poked in the patch
on 1 1/2 inch centers in order to
__________.
After properly lining up the main
propulsion turbine for warm up, steam
should first be admitted to the rotor
through the ________.
After restoring the normal water level in
a boiler following a high water casualty,
you should __________.
After routine blowing of tubes at sea,
there should be a decrease in the
__________.

reading stamped on designed oil
the gage only
clearance

Absolute pressure
and hot well
temperature will
decrease.

designed oil
clearance plus the
stamped bridge gage
reading
allow for expansion

stamped bridge gage
reading plus the
bearing wear

LP turbine bleed
valve

prevent spalling

vent escaping
moisture

ahead throttle valve

astern throttle valve

HP turbine bleed
valve

immediately put the
boiler on the line

immediately drain
the economizer

blow down the water completely drain the
gage glass
superheater

fuel oil temperature

stack temperature

excess air required
for complete
combustion

24

Illustration

SE-0017

prevent slag buildup

CO2 in the stack gas

SP091813

ABS

VER

261405

2

268102

268407

257110

269001

1

3

1

1

254001

1

254112

1

254201

1

254201

3

250502

6

Steam Plants

Question
After setting the allowable end play of
the thrust bearing shown, you would
establish the axial position of the turbine
shaft by __________.
After starting the main lube oil pump in
a gravity-type lube oil system, you
should verify that the gravity tanks are
full by __________.
After starting the main lube oil pump in
a gravity-type lube oil system, you
should verify that the gravity tanks are
full by __________.
After steam has been raised and a
boiler is being placed on the line, the
superheater vent can be closed when
__________.
After the housing has been bolted
down, the final check of reduction gear
tooth contact is usually made by
__________.
After the main engine has reached full
sea speed, which of the following
conditions could cause the water level
in the boiler steam drum to keep falling?

Choice A
increasing the
thickness of the
adjusting ring

Choice B
decreasing the
thickness of the
adjusting ring

Choice C
changing the
thickness of the
thrust collar

Choice D
changing the
thickness of the filler
piece

observing the
overflow sight glass

sounding the gravity sounding the lube oil observing the flow
tanks
sump
from the bearings

looking at the
overflow sight glass

sounding the gravity sounding the lube oil observing the flow
tanks
sump
from the bearings

main and auxiliary
the boiler steam
steam line drains are stops have been
opened
warmed up

boiler pressure is 5
psi above line
pressure

the boiler is
supplying auxiliary
steam

alignment gauges

dial indicators

bluing the teeth

bridge gauges

Open cutout valves
on the boiler gage
glasses.

Condensate
recirculating line is
excessively open.

Feed pump
discharge pressure
is set too low.

Feed pump
recirculating valve is
closed.

After the steam leaves the low pressure main condenser
turbine, it enters the __________.

feed and filter tank

first-stage feed water turbine extraction
heater
valve manifold

Air accumulated in the after condenser
of the air ejector unit is discharged
directly to the __________.

high pressure turbine main condenser

atmosphere

Air accumulated in the intercondenser after condenser
of the air ejector assembly is
discharged directly to the __________.

high pressure turbine main condenser

atmosphere

Air for combustion is bypassed around
the boiler air heater when the
__________.

control
desuperheater is
operating

boiler is steaming at
low rates

intercondenser

soot blowers are
operating

25

combustion control
system is in manual

Illustration
SE-0007

SP091813

ABS

VER

254210

1

258100

2

258100

1

254201

2

269924

1

269924

2

254210

2

256406

1

250149

250148

250148

2

3

2

Steam Plants

Question
Air in the main condenser is harmful
because it will __________.
Air leaks through the inner or outer
casing of a boiler could result in
__________.
Air leaks through the inner or outer
casings of a boiler will __________.
Air removed from the main condenser
is vented to the atmosphere through the
__________.
Air trapped in the hydraulic fluid of a
steering system would be indicated by
__________.
Air trapped in the hydraulic fluid of a
steering system would be indicated by
__________.
Air trapped within the main condenser
shell is detrimental because it will
__________.
All fuel oil service pumps are equipped
with a __________.

Choice A
decrease the turbine
exhaust steam
pressure
high superheater
outlet temperature

Choice B
decrease the
vacuum in the main
condenser
low superheater
outlet temperature

improve fuel
combustion
vacuum breaker

decrease stack
temperatures
vent condenser

the pump over
speeding

erratic rudder
response

an improper rudder
response

hammering noises in
the equipment or
transmission lines
decrease the turbine cause the turbine
exhaust steam
casing to warp and
temperature
bow
relief valve on the
combustion control
suction side
valve on the
discharge side
All oil-fired main boilers with automatic a modulating
a pyrostat measuring
safety control systems must be
pressuretrol, sensing decreased steam
provided with _______.
both steam and
temperature
temperature
All oil-fired main propulsion boilers with flame in boiler
actuated by boiler
automatic safety control systems must furnace is confirmed safety trip
automatically close the burner valve
when ________.
All oil-fired main propulsion burners with the flame in boiler
starting "trial for
automatic safety control systems must furnace is confirmed ignition"
automatically close the burner valve
when _________.

26

Choice C
cause heat to be
transferred too
rapidly
higher fuel
consumption for
normal steaming
conditions
cause boiler panting
atmospheric drain
tank
bubbles in the sight
glass

Choice D
cause the turbine
casing to warp and
bow
all of the above

Illustration

reduce boiler
efficiency
after condenser

ram relief valves
lifting

popping or sputtering all the above
noises
decrease the
vacuum in the main
condenser
remote means of
stopping the pump

cause heat to be
transferred too
rapidly
direct suction to the
double bottom tanks

one flame detector
for each burner

one flame detector in
each furnace

burner is properly
seated

starting trial for
ignition occurs

the burner is properly actuated by a boiler
seated
safety trip

SP091813

ABS

VER

259785

2

259785

261800

259282

252400

251319

259325

3

1

2

4

7

1

Steam Plants

Question
All ships with periodically unattended
machinery plants shall, in addition to the
general alarm required by Coast Guard
Regulations (46 CFR), be provided with
a/an __________.
All ships with periodically unattended
machinery plants shall, in addition to the
general alarm required by Coast Guard
Regulations (46 CFR), be provided with
a/an __________.
Allowance for axial expansion of the
steam turbine due to temperature
changes is provided for by the use of
__________.
Although accurate tests of boiler water
for dissolved oxygen are difficult to
obtain on board ship, you can be fairly
certain of proper oxygen removal by
__________.
An accumulation of slag build up on the
boiler furnace floor will cause
__________.
I. peeling of furnace brickwork
II. overheating of the furnace floor
An accumulation test is performed on
the boiler to determine the suitability of
the safety valves and the set points
__________.

Choice A
engineer's
assistance-needed
alarm

Choice B
accommodation
space
communication
system

Choice C
personnel alarm

Choice D
all of the above

accommodation
space
communication
system

engineer's
assistance-needed
alarm

remote vital system
alarm

all of the above

casing flexible joints rotor position
indicators

a deep flexible I
beam support

pivoted-shoe type
thrust bearings

testing frequently for maintaining low
total dissolved solids boiler water pH

giving the boiler
frequent surface
blows

maintaining a normal
level of scavenging
agents

I only

II only

Both I and II

Neither I nor II

I only

II only

Both I and II

Neither I nor II

reduce the blow
down frequency

maintain a pH of 7

remove dissolved
oxygen
concentrations

Illustration

I. if the boiler normal operating
pressure is permanently reduced
II. when the steam generating capacity
is increased
An adequate phosphate reserve should prevent hard scale
be maintained in boiler water to
formation
__________.

27

SP091813

ABS

VER

256354

5

250400

2

250400

1

268605

1

265400

2

260400

1

261017

1

266200

2

266200

1

261015

1

268106

1

269929

2

Steam Plants

Question
Choice A
An advantage of steam atomization
its greater turndown
compared to mechanical atomization is ratio
__________.

Choice D
bleed steam is
utilized thereby
increasing plant
efficiency

An advantage of using boiler furnace
studded water wall tubes packed with
refractory is _________.
An advantage of using boiler furnace
studded water wall tubes packed with
refractory is that __________.
An air vent is installed on some
reduction gear casings to __________.

avoid the
release air pressure admit cooling air to
accumulation of
buildup
the gearing
flammable oil vapors

lower furnace wall
operating
temperature
the use of dense
firebricks is not
required
decrease the
possibility of
corrosion

closing the exhaust
valve slightly

actuating the throttle rotating the hand
hand tripping device lube oil pump
backwards
copper gaskets
asbestos gaskets

increasing the load
on the driven unit

windage loss

tip leakage loss

leaving loss

main circulator pump turbine-driven feed
pump

low pressure
propulsion turbine

forced draft fan

main circulator pump turbine-driven feed
pump
improper nozzle
excessive fluid
angle
friction

low pressure
propulsion turbine
leaking diaphragm
packing

forced draft fan

the strainer needs
cleaning

the relief valve is
stuck open

all of the above

failure of the brine
pump

excessive distillate
pump speed

An auxiliary turbine boiler feed pump
should normally be stopped by
__________.
An efficient seal is normally obtained
between the upper and lower halves of
a turbine casing by __________.
An energy loss associated with a
reaction turbine, but not an impulse
turbine, is __________.
An excess pressure governor is a
special type of control device which
would normally be found on a
__________.
An excess pressure governor would
normally be used on a __________.
An excessive power loss in a straight
reaction turbine is commonly caused by
__________.
An excessive pressure differential
across a lube oil strainer could indicate
__________.
An excessively high brine level in a
flash evaporator can be caused by
__________.

Choice B
Choice C
improved heat
the ability of the
transfer in the boiler system to maintain
the proper ratio of
fuel and air at all
rates of combustion
thinner tubes can be fewer tubes are
lower quality steel
used
required
can be used
thinner tubes can be thicker tubes are
used
required

precision metal-tometal contact
throttling loss

the filter elements
are installed upside
down
excessive vacuum in an excessive brine
the first effect shell blow down rate

28

lower quality steel
can be used

Illustration

flexible steel seal
strips

abnormal tip leakage

SP091813

ABS

VER

258204

1

258652

2

261203

3

258208

2

261018

2

261018

3

259243

3

254505

1

253005

1

252812

4

253009

1

Steam Plants

Question
Choice A
An excessively high superheater
excessive air
temperature could be the result of
__________.
An explosion or flareback could occur in too much excess air
a boiler if __________.
were supplied for
combustion

Choice B
high feed water
temperature

Choice C
Choice D
soot accumulation on excessive steam
the superheater
demand

Illustration

the fuel being burned the firebox is not
had been heated to purged before
the flash point
attempting to light a
fire
An impulse-reaction turbine is
Reaction blading
Stationary nozzles
Reaction stages
Velocitycharacterized by which of the following followed by impulse with impulse blading followed by velocity- compounded stages
arrangements?
diaphragms.
stages.
compounded
followed by reaction
blading.
blading.
An incandescent white flame in a boiler efficient combustion low fuel oil
excessive fuel oil
too much excess air
firebox would indicate __________.
temperature
pressure
An increase in clearance between
reaction blade tips and the turbine
casing will result in __________.
An increase in clearance between
reaction blade tips and the turbine
casing will result in __________.
An increase in the concentration of total
dissolved solids in boiler water can
result from __________.
An increase in the pressure drop
between the inlet and outlet of the feed
water heater waterside, not due to a
waterside obstruction, would indicate
__________.
An indication of a faulty superheater
soot blower element is a __________.

an increase in rotor
thrust load

An indication of a moderate leak
existing in a desuperheater is
__________.
An indication of excessive soot
accumulation on boiler water tubes and
economizer surfaces is __________.

the boiler firing rate
exceeded the end
point of circulation

an increased
pressure drop across
the blades
an increase in rotor an increased
thrust load
pressure drop across
the blades
zero water hardness dissolved oxygen
deaeration

decrease in rotor
torque

increase in rotor
vibration

an increase in
pressure in the
following stage
routine treatment
with phosphates

a decrease in
pressure in the
following stage
frequent prolonged
surface blows

insufficient water
velocity through the
heater

a water flow rate
higher than feed
water heater design
limits

fouling of the heater an accumulation of
steam side
non-condensable
gases in the steam
circuit

low stack
temperature

low superheater
outlet temperature

high superheater
outlet temperature

low fuel oil
consumption

high auxiliary steam
pressure

low auxiliary steam
temperature

reduced feed water
consumption

a sudden increase in
make-up feed

low stack
temperature

high stack
temperature

lower feed water flow high feed water
temperature

29

SP091813

ABS

VER

260601

3

250250

1

252602

1

268406

1

264601

269709

269709

1

1

2

259090

1

250501

1

250405

4

Steam Plants

Question
An intermediate chamber is used in
conjunction with labyrinth packing on
main turbine shaft glands to provide a
__________.
An internal leak in a fuel oil heater can
result in __________.

Choice A
Choice B
Choice C
Choice D
pressure relief during sealing steam supply sealing steam flow to suction path to the
periods of low
during periods of low the throttle
air ejectors
internal vacuum
internal pressure
water contamination oil contamination of
of the fuel oil
the heater drains

carbon buildup in the fluctuating fuel oil
heater
pressure

An obstruction in the top connection of
a boiler gage glass will cause the
__________.
An overheated bearing in the main
propulsion unit is indicated by
__________.
An unusual vibration in the main
propulsion turbine unit, accompanied by
a rumbling sound in the reduction gear,
could be caused by __________.

water level to remain water level to rise
constant in the glass slowly in the glass

gage glass to
overheat and break

overloading of the
condenser

sludge in the lube oil high level in the lube high temperature of
strainers
oil sump
the lube oil leaving
the bearing
a carryover from the a reduction in
a labyrinth seal
boiler
condenser vacuum failure

Any abnormal condition or emergency
occurring in the fire room must be
immediately reported to the
__________.
Any abnormal condition or emergency
that occurs in the engine room must be
reported immediately to the
__________.
Any feed water testing done on a
routine basis would normally include
testing for __________.
Arrow "B" shown in the illustration
indicates the __________.
As a general rule, for proper results
castable fireclay must be air cured for
__________.

oiler on watch

engineer on watch

first assistant
engineer

U. S. Coast Guard

first assistant
engineer

fireman on watch

Chief engineer

engineer on watch

chloride

phosphate

regenerative air
heater
12 hours

retractable soot
blower opening
18 hours

electrical conductivity all of the above
(total dissolved
solids)
combustion air inlet uptakes

bubbles in the sight
flow glasses

30

24 hours

Illustration

gage glass to be
blown empty

SG-0008

48 hours or longer

SP091813

ABS

VER

250304

1

256801

268800

262409

262409

2

3

3

1

268416

1

262010

1

250000

2

250000

1

Steam Plants

Question
As compared with a typical front fired
boiler, which of the listed conditions
represents an advantage of a top fired
boiler?

As found in a basic pneumatic
automatic combustion control system,
the function of a standardizing relay is
to __________.

As found in a reduction gear drive
system, thrust bearings serve to
__________.
As indicated in the graph, what
percentage of rated horsepower is
being developed when operating the
main propulsion turbine at 80% speed?
As indicated in the graph, what
percentage of rated horsepower is
being used to operate the main
propulsion turbine at 30% speed?
As lube oil absorbs moisture its
dielectric strength can be expected to
__________.
As shown in the illustration (SE-0019),
live steam is supplied to the gland seal
regulator via ________.
As steam accomplishes work in an
engine or turbine, it expands and
__________.
As steam accomplishes work in an
engine or turbine, the pressure of the
steam is reduced because it
__________.

Choice A
No division tube wall
separating the
convection and
radiant sections of
the furnace is ever
required.
provide a backup
means for manual
control of the system

Choice B
Superheating
diaphragms may be
omitted.

Choice C
More uniform heat
distribution and gas
dwell is obtained
within the furnace.

Illustration
Choice D
A lower fuel flow rate
can be allowed, thus
increasing economy.

control the boiler
drum water level
within acceptable
limits regardless of
the load

introduce a control
for maintaining
constant steam
pressure regardless
of boiler load

transmit the force
produced by the
propeller to the
structure of the ship
10%

limit the radial
movement of the
shaft

introduce a control
for maintaining
constant
superheated steam
temperature
regardless of boiler
load
increase the shaft
speed

50%

80%

25%

hold the main engine
in place

SE-0018

1%

4%

10%

40%
SE-0018

remain the same

decrease

increase with an
increase with a
increase in viscosity decrease in viscosity

line "C"

line "D"

line "G"

line "A"
SE-0019

increases in
superheat

decreases in
superheat

diminishes in volume becomes saturated
again

31

decreases in volume decreases in
moisture content
expands in volume

becomes
superheated again

SP091813

ABS

VER

261235

4

258215

1

259030

1

257203

1

250034

1

256307

1

250005

3

252814

4

Steam Plants

Question
As steam first enters the main
propulsion turbine, which of the
following energy conversions takes
place?
As the percentage of CO2 in the stack
gas decreases, you can assume that
__________.

Choice A
potential to kinetic

Choice B
mechanical to
thermal

the fuel to air ratio is fuel is being burned
increasing
with increasing
economy

you are approaching excess air is
secondary
increasing
combustion

As the pH of the boiler water
approaches zero, the water becomes
increasingly __________.
As the rate of combustion is increased
in a boiler, more steam is generated
because the __________.
Assume that steam has formed in a
boiler in which all of the steam stop
valves are closed, and the water level is
held constant. When there is an
increase in the temperature of the
steam and water in the boiler, which of
the following effects will occur on the
pressure and the specific volume of the
steam?
Assuming all burners are clean and the
fuel oil is at the correct temperature, it is
considered good practice to adjust the
excess air until a light brown haze is
obtained. With the aid of a chemical
based flue gas analyzer, the percentage
readings (not necessarily in order)
should indicate __________.

soft

alkaline

neutral

fires are hotter

mass flow rate of hot furnace becomes
gas increases
hotter

The steam pressure The pressure will
and volume will
increase and the
remain constant.
volume will remain
constant.

no CO, low O2, and
high CO2

At a given pressure, erosion of steam
superheated steam
piping and machinery will be minimized
by utilizing __________.
At which point of the blistered boiler
A
tube shown in illustration will the
temperature be the greatest?

Choice C
chemical to thermal

The pressure will
remain constant and
the volume will
increase.

Choice D
thermal to chemical

acidic

flue gas turbulence
decreases
The pressure will
increase and the
specific volume will
decrease.

low CO2, no O2, and high CO, high CO2,
high CO
and no O2

high O2, low CO,
and low CO2

desuperheated vapor wet steam

saturated steam

B

D

C

Illustration

SG-0012

32

SP091813

ABS

VER

258019

4

250101

12

250122

2

260000

1

260000

3

268701

1

268701

2

268701

4

261206

268804

3

2

Steam Plants

Question
Automatic fuel shutoff to the burners of
a main propulsion boiler could result
from __________.
Auxiliary exhaust steam can generally
be used as a supply for the
__________.
Auxiliary steam at full operating
pressure is supplied from the boiler
directly to the __________.
Axial movement in a gear-type flexible
coupling is provided for by __________.

Choice A
high boiler water
level

Choice B
Choice C
carbon deposits on dirty flame scanner
the ignition electrode

Illustration
Choice D
excessive fuel return
pressure

air ejectors

steam atomizers

air heater supply

fuel oil heaters

turbo generators

main air ejectors

distilling plants

soot blowers

each gear sliding on the variable oil
gear teeth on the
its shaft between
clearance in the quill floating member
retaining collars
shaft
sliding between
internal teeth on the
shaft ring
Axial movement in a gear-type flexible flexible "I beam"
the variable oil
gear teeth on the
coupling is provided for by __________. construction
clearance in the quill floating member
shaft
sliding between
internal teeth on the
shaft ring
Babbitt is a metal alloy commonly used bearings
cylinder liners
bearing journals
for lining __________.
Babbitt is a metal alloy commonly used saltwater piping
valve seats
shim stock
for lining __________.
Babbitt metal is used to make
pump packing rings shaft journals
bearing surfaces
__________.
Because of the pressure drop existing a fluid seal
deflector rings
a Babbitt liner
across each diaphragm, the flow of
steam between the nozzle diaphragm
and the rotor of the turbine is held to a
minimum by __________.
Because the entire thrust bearing
leveling plates and
base ring and
leveling plates and
assembly is normally submerged in oil, collar
pivoted shoes
buttons
the pivoting shoe arrangement allows
the formation of a continuous wedge
shaped oil film shown in the illustration
by arrow "B", between the __________.

33

adjusting the pitch of
the teeth on the
pinion and high
speed gears
adjusting the pitch of
the teeth on the
pinion and high
speed gears
saltwater piping
precision bearings
non-sparking tools
a labyrinth packing
ring

collar and pivoted
shoes
SE-0012

SP091813

ABS

VER

258652

1

251555

1

Question
Before an explosion can occur in a
boiler furnace, there must be an
accumulation of unburned fuel,
sufficient air to form an explosive
mixture, and a __________.
Before blowing tubes in a boiler
equipped with steam soot blowers, you
should __________.
Before commencing a surface blow, the
boiler __________.

Choice A
space large enough
for the explosion to
occur

Choice B
Choice C
ground in the burner high steam demand
ignition electrode
on the boiler

Illustration
Choice D
source of ignition for
the explosive mixture

increase the boiler
water level

decrease the boiler
water level

lower the boiler
steam pressure

should be cold

water level should be water drum should
lowered to the
be checked for
surface blow line
sludge

water level initially
lowered below
normal
raise the water level
2 or 3 inches above
normal
open the skin valve
on the blow down
line
raise the water level
2 or 3 inches above
normal
purge the furnace
with air

boiler steam
pressure should be
increased
lower the water level
2 to 3 inches below
normal
secure the fires in
the furnace

259260

2

250724

1

259260

4

259260

3

Before giving a boiler a bottom blow, it
should be taken off the line and then the
__________.
Before giving a boiler a surface blow
when underway at sea, you should
__________.
Before giving a boiler a surface blow,
you must __________.

259260

1

Before giving a boiler a surface blow,
you should __________.

257107

5

Before lighting any burner in a cold
boiler you should always __________.

263002

2

251556

1

251555

2

Steam Plants

Before placing the jacking gear in
operation on a main turbine unit, you
must always insure that __________.
Before using a boiler compressed air
soot blower system, you should
__________.
Before using the steam soot blowers to
blow tubes at sea, you should
__________.

reduce the forced
draft fan speed

water level initially
raise above normal
increase forced draft
air pressure to
maximum
lower the water level
to a half glass

lower the water level reduce the boiler
to the normal level
firing rate to the
minimum
open the furnace
close off the burner
peephole cover
register

the gland seal steam the main salt water
system is operating circulating pump is
operating
reduce the boiler
lower the water level
pressure

the condensate
system is operating

water level should be
raised 2 to 3 inches
(5 to 7.6 cm) above
normal
boiler air cock should
be cracked
temporarily secure
all burners on that
boiler
increase the boiler
steam pressure
above normal
take the boiler off the
line and let it cool 1
hour
reduce the forced
draft pressure
the main lube oil
system is operating

decrease the forced drain the soot blower
draft fan speed
pneumatic operating
lines
raise the water level lower the water level increase the firing
decrease the firing
rate
rate

34

SP091813

ABS

VER

250903

1

257802

1

252814

2

250724

6

258200

2

253008

1

251555

4

257401

1

251400

1

258008

1

250402

2

Steam Plants

Question
Choice A
Bi-color water level indicators,
different refractive
connected directly to the boiler drum,
properties of steam
operate on the principle of __________. and water

Black smoke issuing from the boiler
stack can be caused by an improper
fuel/air ratio and by __________.
Blisters developing on boiler tubes can
be caused by __________.
Blowing down a water wall header while
steaming a boiler at a high firing rate
could result in __________.

Boiler furnace brickwork can be
fractured and broken by thermal shock
caused by __________.
Boiler refractory anchor bolts are
secured to the casing by __________.

Choice C
different chemical
properties of steam
and water

Illustration
Choice D
different densities
which result from the
comparison of the
varying steam
pressure in the drum

excessively high fuel low fuel temperature high fuel temperature low fuel pressure
pressure
air in the feed water

cold feed water

hot feed water

excessive strain on
boiler blow down
lines

the thermo-hydraulic
feed water regulator
valve slamming
closed
prevent excess air
density at low load
conditions

a load imbalance
between other
boilers on the line

Boiler efficiency and its ability to absorb maintain an excess
heat is limited by the need to
of CO during
__________.
transient firing rates
Boiler firesides must be kept free of
soot accumulations because
__________.
Boiler forced draft pressure should be
increased before blowing tubes to
__________.
Boiler fuel oil atomizer parts should be
cleaned by soaking in 'tip cleaner' or
diesel fuel and __________.
Boiler fuel savings gained by the use of
an economizer can amount to
__________.

Choice B
special insoluble
indicating fluids

protect the safety
valves from
excessive
temperature
the steam drum
the fuel oil heaters
internals will become will become
clogged
overloaded
aid in removing
maintain a clear
loosened soot
stack

waterside scale
deposits
an interruption in the
water circulation

maintain uptake gas
temperature above
the dew point

soot interferes with
the flow of feed
water
prevent
condensation in the
uptakes
polished with emery brushed with a steel scraped with a
cloth
brush
nonabrasive tool

soot insulates the
boiler heating
surfaces
prevent a drop in
steam pressure

three percent for
one percent for each one half percent for
each 5°F rise in feed 10°F rise in feed
each 15°F rise in
water temperature
water temperature
feed water
temperature
leaving the registers load changes on the allowing the furnace
open on a hot boiler boiler while
to cool too slowly
answering bells
hooked ends
slots in the firebrick high strength tensile
inserted into pads
fasteners
welded to the casing

three percent for
each 20°F rise in
feed water
temperature
cold feed water
passing through the
boiler economizer
furnace mortar

35

scraped with a
modified table knife

SP091813

ABS

VER

250402

1

250404

250701

253011

253011

2

4

1

3

250604

1

252823

1

259495

1

259120

3

256353

2

Steam Plants

Question
Boiler refractory firebrick is secured to
the casing by __________.

Choice A
slots in the brick
engaging anchor
bolts
rapid cooling

Boiler refractory previously baked out
and fired are most sensitive to
__________.
Boiler screen tubes are used to protect Superheater
which of the listed components from
high furnace temperature?

Choice B
Choice C
high strength tensile studding on the
fasteners
water wall tubes

Choice D
fast drying plastic
refractory mortar

sustained high
rapid heating
furnace temperature

radiant heat of the
burner

Refractory

Wall tubes

Steam drum

fuel oil temperature
is excessively high

secondary
combustion occurs in
the gas passages

Boiler stack gas temperature could be
higher than normal if __________.

leakage exists in the defects exist in the
inner and outer
burner cone
casing
refractory

Boiler stack gas temperatures will be
higher than normal when __________.

fuel temperature at
the burners is
excessively high

Boiler superheaters are designed to
__________.

raise the sensible
heat of the steam

Boiler tube failures can result from
__________.
Boiler water hardness is increased by
__________.
Boiler water samples should be
circulated through a cooling coil prior to
analysis because __________.

corrosion

Boilers equipped with steam atomized
burners can be operated without
changing burner tips because steam
atomization __________.

maintains the oil at finely atomizes fuel
ignition temperature oil over a band of
fuel oil system
pressures

zero alkalinity in the
water
this prevents the
boiler water from
flashing into steam
as the sample is
collected

not enough excess
air is being supplied
for combustion

secondary
combustion is
occurring in the gas
passages
increase the overall provide continuous
mechanical
steam flow to the
efficiency of the plant control
desuperheater
overheating
mechanical stress

internal water wall
refractory baffles
have failed

scale forming salts in
the feed water
it reduces the
amount of
suspended matter
that frequently finds
its way into the dead
end lines

improper operation
of the DC heater
the degree of acidity
as measured on the
pH recorder is
amplified by cool
water temperatures

36

dissolved gases in
the water
the cool sample has
a higher conductivity
measurement and
the total dissolved
solids in the water
are easier to identify

Illustration

raise the latent heat
of the steam

all of the above

automatically cleans regulates itself by
the burner tips and responding to the
eliminates fouling
position of the main
engine throttles

SP091813

ABS

VER

256353

1

256353

3

250402

3

263302

3

256520

5

252701

3

268619

1

259252

2

257806

2

258018

2

Steam Plants

Illustration
Choice D
steam velocity aids
in the atomizing of
fuel oil over a wide
range of fuel
pressures
the degree of
atomization is not
dependent upon fuel
oil pressure

fillet welds

Choice C
it is not necessary to
regulate fuel oil
pressure at the
burners with this
system
it is not necessary to
regulate fuel oil
pressure at the
burners with this
system
tack welds

identify the bearing
by radius

center the bearing
load point

center the bridge
gauge

measure the angle to
bridge gauge

increase the heating
value
form a protective
coating thus
increasing its life

increase its specific
gravity
seal refractory joints
thereby improving its
function

reduce its viscosity

Inspection covers

Bull's eyes or sight
glasses

Sodium phosphate

Sodium hydroxide

Phenolphthalein

Caustic soda

low fuel oil
temperature
too much excess
combustion air

high fuel oil
temperature
a faulty ignition
electrode

low fuel oil viscosity

high fuel oil pressure

a dirty atomizer
sprayer plate

the burner cycling on
and off

Question
Boilers equipped with steam atomizers
can operate over a wide load range
without cutting burners in and out
because __________.

Choice A
Choice B
steam maintains the atomizing steam
oil at the fire point
pressure is held
temperature
constant for all load
ranges

Boilers equipped with steam atomizers
can operate over a wide load range
without cutting burners in and out
because __________.

steam maintains the atomizing steam
oil at the fire point
pressure is held
temperature
constant for all load
ranges

Brick bolts, tile bolts, and pennant
anchors are attached to the inner
casing by __________.
Bridge gage readings are to be taken
on the bearing shown in the illustration.
You would use the indicated 3 3/4"R to
__________.
Bunker "C" fuel oil is heated prior to
atomization to __________.
Burning fuel with entrained saltwater,
will cause a glassy slag formation on
furnace refractory. This slag will
__________.
By which of the following means can
rotating parts of the main reduction gear
be examined?
Calcium minerals in boiler water are
precipitated out of solution by the use of
which of the listed chemicals?
Carbon deposits in a fuel oil heater are
caused by __________.
Carbon deposits on the boiler burner
throat ring is usually caused by
__________.

retaining clips

37

All of the above are
correct.

SE-0017

reduce the flash
point
expand at a different increase the furnace
rate and result in
efficiency because of
damaged refractory reduced firebox
turbulence
RT junction boxes
Tachometer drives

SP091813

ABS

VER

258018

3

259498

1

260600

2

257806

6

259407

269918

4

5

268702

1

259285

2

Steam Plants

Question
Carbon deposits on the diffuser and
register throat ring of a burner
__________.

Choice A
Choice B
Choice C
Choice D
interfere with air flow cause pre-ignition of allow heat loss to the are of no
around the burner
the atomized fuel
boiler casing
consequence and
may be left in place
until a fireside
inspection allows
time for removal
Carbon dioxide dissolved in boiler water forms carbonic acid breaks the magnetic combines with
combines with
is dangerous in a modern power boiler which attacks the
iron oxide film inside sulfates to cause
oxygen to cause
because the gas __________.
watersides
boiler tubes
severe waterside
severe waterside
pitting
scaling
Carbon ring packing segments are
garter springs
centering rings
steam pressure
labyrinth rings
secured in a shaft gland assembly of a
steam turbo generator by means of
__________.
Carbonization of the conductive
a fluid film layer
the relative velocities the thermal
radiational heat
surfaces of a fuel oil heater results in
covers the solid
of the fluids must be conductivity of
transfer becomes
reduced heating capacity because
contaminants and
decreased causing a solidified
severely impaired
__________.
increases heat
corresponding loss contaminants is poor
transfer
of heat transfer
Carryover in a marine boiler can be
caused by __________.

boiler water
contaminants

low boiler water
alkalinity

Cavitation is a term commonly used
with centrifugal pumps to describe
__________.

the formation and
subsequent collapse
of vapor pockets in
the impeller

excessive
the laminar flow of
clearances produced the fluid being
on the impeller
pumped
wearing rings

Chamfers, located at the parting edges
of horizontal split sleeve type bearings,
are used to facilitate oil storage and
distribution. They are machined
__________.
Chemicals are added to boiler feed
water to __________.

radially the full length axially the full length radially, to within 45
of the bearing
of the bearing
degrees of the
normal bearing
surface

axially, approaching
but not extending to
the end of the
bearing

reduce the frequency prevent precipitation decrease heat
of blow downs
of sludge
transfer

precipitate dissolved
oxygen

38

Illustration

a high concentration operating under low
of hydrazine in the
load conditions for
boiler water
extended periods
water hammer in the
pump suction line

SP091813

ABS

VER

259300

1

Question
Choice A
Choice B
Choice C
Chemicals are added to boiler water by as a powder into the as a powder into the in solution into the
injecting them __________.
mud drum
steam drum
main feed line

259281

2

Chemicals are added to boiler water in
order to __________.

reduce oxygen
corrosion

259322

1

Chemicals are added to boiler water to
__________.

eliminate the need
for blow downs

250061

8

250719

2

Circulation in a water-tube boiler is
caused by the difference in the
__________.
Circulation of boiler water to the water
wall tubes is maintained by the
__________.
Circulation of water and the
steam/water mixture within a natural
circulation boiler is retarded by
__________.
Clean low pressure steam drains are
collected in the __________.
Clean oil leaves the centrifuge
illustrated through item __________.
Coast Guard Regulations (46 CFR Part
52) concerning boiler superheater
safety valves require that the valve
________.
Coast Guard Regulations (46 CFR Part
56) permit copper pipe to be used for
steam service subjected to a maximum
pressure and temperature of
__________.
Coast Guard Regulations (46 CFR Part
56) require that new fuel oil service
piping between pumps and burners be
subjected to __________.

258800

2

250144

1

267840

1

259779

259736

259763

3

2

1

Steam Plants

Choice D
in solution through
the chemical feed
pipe
eliminate dissolved
chlorides

decrease the
necessity for blow
downs
prevent scale
forming deposits

area and length of
the water-tubes

reduce the total
dissolved solids
content
stabilize feed water if
a boiler becomes
salted up
densities of the
circulating water

heights of the boiler
drum

maintain an acidic
condition in the feed
water
angle of inclination of
the tubes

water screen tubes

risers

downcomers

generating tubes

large changes in
steam density

fluid friction in the
downcomers, drums,
generating tubes,
and headers
contaminated drain
inspection tank
N

high feed water
pressure

back pressure in the
steam drum acting
on the user tubes

atmospheric drain
tank
V

main condenser hot
well
X

deaerating feed
water heater
K
be set at a lifting
pressure that is
higher than the drum
safety valve
350 psi and 460°F

have a drain opening be constructed with a have a threaded inlet
tapped for not less
cast iron body
connection if greater
than 1/4 in. NPS
than 2 in. NPS
350 psi and 406°F

250 psi and 460°F

250 psi and 406°F

a hydrostatic test of
1.5 times the
maximum allowable
pressure but not less
than 500 psi (3447
kPa)

a hydrostatic test of
1.25 times the
maximum allowable
pressure with the
relief valves closed

spot radiographic
examination of
portions of the
finished weld joints

a hydrostatic leak
test to the design
pressure specified by
the Coast Guard

39

Illustration

GS-0124

SP091813

ABS

VER

267951

1

259784

259779

1

2

Choice A
the lube oil system to
function satisfactorily
when the vessel has
a permanent list of
25°

Coast Guard Regulations (46 CFR)
concerning marine boilers, require the
installation of a safety valve on the
__________.
Coast Guard Regulations (46 CFR)
concerning superheater safety valves
require that the valve __________.

auxiliary steam outlet desuperheated
steam outlet

Coast Guard Regulations (46 CFR) for
boiler fuel oil service systems require
__________.
259788

1

Coast Guard Regulations (46 CFR) for
boiler fuel oil service systems, require
that __________.
259753

259762

259735

2

2

1

Steam Plants

Illustration
Choice B
Choice C
Choice D
lube oil coolers to
lube oil piping to be two standby auxiliary
have three separate independent of other lube oil pumps be
means of circulating piping systems
provided
water

Question
Coast Guard Regulations (46 CFR)
concerning lubricating oil systems for
main propulsion turbines, require
__________.

Coast Guard Regulations (46 CFR) for
boiler safety valves, require that
__________.

preheated steam
outlet

superheated steam
outlet

be set at a pressure can only be operated nominal size is not
higher than the drum by a pilot valve
less than 1.5 inches
safety valves
nor more than 4
inches
fuel oil heaters for
fuel oil service tanks machinery driving
boilers burning fuels to overhang boilers fuel oil service
with low viscosity
to utilize heat
pumps to be fitted
radiated from the
with remote controls
boilers for greater
so that they may be
efficiency
stopped in the event
of a fire

is not set at a
pressure less than
the feed pump relief
valve
all piping between
service pumps and
burner fronts to be
located below the
floor plates to
eliminate fire
hazards

discharge piping
from the service
pumps to the
burners must be of
schedule 60
seamless steel

no valves of any type
shall be installed in
the leak off from
drains or drain
headers
Coast Guard Regulations (46 CFR)
the chief engineer in
permit repairs and adjustments to boiler an emergency
safety valves while installed on a main
propulsion boiler and may be made by
________.

the return line from
the burners must be
arranged so that
suction piping cannot
be subject to
discharge pressure

the fuel oil service
pump relief valve
must discharge to a
wing tank

the suction strainer
must be a simplex
type

all safety valve gags
or clamps must be
carried on board the
vessel at all times

the final setting of
the safety valves
shall be checked and
adjusted under
steam pressure
an approved repair
facility only

All of the above are
correct.

any competent
person on the ship

40

only the safety valve
manufacturer

SP091813

ABS

VER

256509

1

259743

259764

259746

259757

259743

259776

1

2

4

4

3

1

Steam Plants

Question
Coast Guard Regulations (46 CFR)
prohibit which of the following pipe
fittings from being installed in fuel oil
service discharge piping?
Coast Guard Regulations (46 CFR)
regarding hydrostatic testing of main
steam piping state that __________.

Choice A
Pipe unions

Choice B
Screwed bonnet
valves

Choice C
Street ells

Choice D
Bolted flange joints

the hydrostatic test
shall be applied from
the boiler drum to
the throttle valve

the hydrostatic test
pressure must be
maintained on the
piping for a minimum
of one hour

a pipe with a nominal
size of six inches or
more is not required
to be hydrostatically
tested

Coast Guard Regulations (46 CFR)
require that alarm systems be provided
for superheaters whose operating outlet
temperature is capable of exceeding
__________.
Coast Guard Regulations (46 CFR)
require that boiler mountings shall be
removed and studs examined by a
Coast Guard inspector __________.
Coast Guard Regulations (46 CFR)
require that in preparing a water-tube
boiler for a hydrostatic test, you should
fill the boiler with water at a temperature
of not less than __________.

550°F (288°C)

not less than fifty
percent of the
lagging shall be
removed each time
the hydrostatic test is
applied
650°F (343°C)

750°F (399°C)

850°F (454°C)

every 4 years

every 10 years

when the boiler is
at each inspection
hydrostatically tested for certification

50°F and not more
than 100°F

70°F and not more
than 160°F

60°F and not more
than 120°F

100°F and not more
than 200°F

Coast Guard Regulations (46 CFR)
require that main steam piping must be
hydrostatically tested at specified
intervals. If the pipe insulation cannot
be removed during this test, the piping
shall be tested at __________.
Coast Guard Regulations (46 CFR)
require that quick-closing valves on a
fuel oil service system should be
installed as close as is practicable to
the __________.

1 1/4 times the
maximum allowable
working pressure
and the pressure
maintained for 10
minutes
suction side of the
fuel oil pump

1 1/2 times the
maximum allowable
working pressure
and the pressure
maintained for 20
minutes
boiler front fuel oil
header

operating pressure
and temperature and
the pressure
maintained for 1 hour

a pressure and
temperature
specified by a Coast
Guard marine
inspector

41

Illustration

fuel oil settling tanks fuel oil service
heaters

SP091813

ABS

VER

259777

1

259762

259753

259753

259747

259747

256406

259741

1

1

5

1

2

2

2

Steam Plants

Question
Coast Guard Regulations (46 CFR)
require that the design pressure of an
economizer integral with the boiler and
connected to the boiler drum without
intervening stop valves shall be at least
equal to __________.
Coast Guard Regulations (46 CFR)
require that the final setting of boiler
safety valves be conducted in presence
of the __________.
Coast Guard Regulations (46 CFR)
require the duplex fuel oil discharge
strainers installed in boiler fuel oil
service systems to be __________.

Choice A
the feed pump shut
off head pressure

Choice B
Choice C
110% of the drum
125% of the boiler
safety valves highest hydrostatic test
set pressure
pressure

Choice D
150% of the boiler
design test pressure

Chief Engineer

COTP

OCMI

Marine Inspector

located so as to
as close to the fuel
preclude the
oil service manifold
possibility of spraying as practicable
oil on the burner or
boiler casing

enclosed in a dripproof vented
enclosure to reduce
the possibility of fire

a positive venting
system that will
return any vapors to
the pump suction

Coast Guard Regulations (46 CFR)
require the temperature of the water
leaving an oil fired, cast iron, low
pressure, hot water heating boiler must
not exceed __________.
Coast Guard Regulations (46 CFR)
require unfired pressure vessels with
manholes to be hydrostatically tested
__________.
Coast Guard Regulations (46 CFR)
require unfired pressure vessels with
manholes to be hydrostatically tested
__________.
Coast Guard Regulations (46 CFR)
requires machinery driving the fuel oil
transfer and fuel oil service pumps to be
fitted with a remote means of stopping
that machinery __________.
Coast Guard Regulations (46 CFR)
state that a marine inspector may
require a boiler to be drilled or gaged to
determine actual thickness
__________.

190°F (87.8°C)

210°F (98.9°C)

230°F (110.0°C)

250°F (121.1°C)

every four years

every eight years

at each certification
inspection

at the discretion of
the marine inspector

every 4 years

every 8 years

at each certification
inspection

at the discretion of
the marine inspector

within the space
concerned

outside of the space at the throttle station within the fire room
concerned

at the first inspection to preclude
for certification
nondestructive
testing methods

42

Illustration

at any time its safety when boiler drum
is in doubt
thickness has
decreased by 5%

SP091813

ABS

VER

259738

1

259738

259738

259757

267950

259734

3

2

2

1

1

Steam Plants

Question
Coast Guard Regulations (46 CFR)
state that main propulsion water-tube
boilers are not required to be fitted with
a surface blow off valve if the design
pressure is __________.
Coast Guard Regulations (46 CFR)
state that main propulsion water-tube
boilers are not required to be fitted with
a surface blow off valve if the design
pressure is __________.
Coast Guard Regulations (46 CFR)
state that main propulsion water-tube
boilers are required to be fitted with a
surface blow off valve if the design
pressure is __________.
Coast Guard Regulations (46 CFR)
state that the temperature of the water
for a hydrostatic test on a fire-tube
boiler will be not less than 70° and not
more than __________.
Coast Guard Regulations (46 CFR),
require main propulsion lube oil
systems to be designed to function
satisfactorily when the vessel has a
permanent __________.
Coast Guard regulations require that
the relieving capacity of boiler safety
valves must be checked __________.

Choice A
Choice B
Choice C
Choice D
300 psig (2169 kPa) 350 psig (2413 kPa) 500 psig (3548 kPa) 550 psig (3893 kPa)
or over
or over
or over
or over

more than 200 psig
(1436 kPa)

more than 250 psig
(1795 kPa)

more than 300 psig
(2169 kPa)

more than 350 psig
(2513 kPa)

less than 200 psig
(1436 kPa)

less than 250 psig
(1795 kPa)

less than 300 psig
(2169 kPa)

less than 350 psig
(2513 kPa)

90°F

100°F

130°F

160°F

15° list and a
permanent 5° trim

15° list and a
permanent 10° trim

22° list and a
permanent 10° trim

30° list and a
permanent 10° trim

at least once a year

at least once every 4 when the generating when repairs have
years
capacity of the boiler been made to the
is increased
safety valves

43

Illustration

SP091813

ABS

251319

259737

VER

3

2

256813

1

251552

1

256358

1

250307

2

260200

1

257808

2

Steam Plants

Question
Coast Guard regulations require that
the superheater safety valves
__________.

I only

Choice A

Choice B
II only

Choice C
Both I and II

Choice D
Neither I nor II

Coast Guard Regulations, 46 CFR Part
54, require steam safety and relief
valves to be provided with a substantial
lifting device, capable of lifting the disc
from its seat at what percentage of the
set pressure?
Combustion control systems on
automatic boilers are designed to
prevent immediate burner ignition after
a normal or safety shutdown in order to
allow time for __________.
Combustion gases can leak into the fire
room through __________.

0%

25%

75%

90%

the furnace to be
purged

electric charge
the fuel pump to start the drum level to
buildup in the igniter
equalize

desuperheater seals fouled burner
registers

idle burner
assemblies

soot blower swivel
tube packing glands

Compared to the return flow oil burner
system, an internally mixed steam
atomizer requires __________.
Component "B" shown in the illustration
is properly identified as the
__________.
Concerning the classification of steam
turbines, a cross compound designed
unit __________.

higher fuel oil
viscosity

less excess air

higher air velocity

greater turbulence in
the air/oil stream

drumhead

wrapper sheet

tube sheet

drum crown

Illustration

I. and the drum safety shall have a total
rated capacity not less than the
maximum generating capacity of the
boiler
II. be set and adjusted under pressure,
regardless of the pilot pressure source

SG-0007
consists of reaction consists of one
stages and a dummy Curtis stage and
piston
reaction blading

Condensate accumulating in the steam overheating
side of a fuel oil heater could result in
__________.

scale accumulation

44

consists of a high
pressure turbine,
crossover pipe, and
low pressure turbine

is made up of a
varied assortment of
impulse and reaction
staging

corrosion

immediate oil
contamination of the
condensate

SP091813

ABS

VER

257808

1

250160

3

254414

1

254105

1

250160

2

266401

3

250163

1

254410

2

250302

253011

1

6

Steam Plants

Question
Condensate accumulation in the steam
side of a fuel oil heater could result in
__________.
Condensate from fuel oil heating coils
return to the __________.
Condensate is pumped from the
condenser to the DC heater instead of
directly to the boiler because
__________.

Choice A
scale accumulation
in an operating
heater
feed water heater

Choice B
Choice C
water contamination reduced heating
of the fuel oil
capacity in an
operating heater
engine room bilge
reserve feed tank

Choice D
annealing of the
heater tube bundles

boiler feed pumps
must operate with a
negative suction
head

Condensate pumps have distinctly
noticeable characteristics and can
usually be recognized by their
__________.
Condensate return lines from tank
heating coils are led to the
__________.
Constant speed governors are normally
employed with __________.
Contaminated steam generators in a
contaminated drain system are usually
__________.
Cooling water to the vent condenser in
a DC heater is supplied by the
_______.
Corrosion due to electrolytic action in
modern water-tube boilers is
uncommon because __________.

speed-limiting
governors and
closed impellers

suspended solids in condensate should condensate at
the condensate must be deaerated before condensing
be eliminated
entering the boiler
temperature is too
hot and will cause
thermal stress in the
boiler
large suction
multiple impellers
open impellers and
chambers and
and pump shaft
power ends
impeller eyes
positions

Corrosion of the flue gas side of the
economizer can be a result of the
__________.

Illustration

drain inspection tank

atmospheric drain
tank

main condenser

DC heater

contaminated drain
system

cruising turbines
single effect

high pressure
turbines
double effect

turbo generator units variable speed
turbines
triple effect
multistage flash type

salt water circulator

main feed pump

feed booster pump

main and/or auxiliary
condensate pump

boiler water is a
strong electrolytic

alkalinity control
treatment prevents
electrolytic action

electrolytic action
cannot occur at high
pressure

I only

II only

boiler components
are generally
constructed of
similar metals
both I and II

neither I or II

I. stack gas temperature being lower
than the dew point
II. feed water temperature being
excessively cool

45

SP091813

ABS

VER

252824

1

250200

2

259414

1

253308

1

250009

261204

2

1

269856

1

251201

1

251203

269083

3

4

Steam Plants

Question
Cratering and water tracking in boiler
tubes is caused by __________.

Choice A
burning a fuel with a
high vanadium
content
Damage to deck machinery from water installing a steam
hammer developing in the steam lines strainer in all exhaust
can be prevented by __________.
lines

Choice B
baked on slag
deposits

Choice C
soot corrosion

opening machinery draining the steam
throttle valves rapidly piping before
operating any
machinery
high superheater
insufficient steam
outlet temperature
flow through the
superheater
main condenser hot distilled water tank
well

Choice D
water trapped
between tubes and
refractory
ensuring that all
drain lines are
properly insulated

Damaging scale can form on the interior
of superheater tubes as a result of
__________.
Deaeration of condensate primarily
occurs in what section of the illustration
shown.
Depending upon the design of the
boiler, the constant pressure
maintained at the steam drum or the
superheater outlet is known as the
__________.
Design characteristics of a velocitycompounded impulse turbine include
the utilization of __________.

leaks from the
desuperheater

Despite troubleshooting the system, the
watch engineer has been unable to
transfer fuel to the settler while
underway. As the settler level is
becoming dangerously low, the
engineer should now __________.
Desuperheated steam can be found at
the __________.
Desuperheated steam from the control
desuperheater is returned to the main
superheater to control the outlet
temperature by the action of
__________.
Dirt and/or metallic particles in a
reduction gear lubricating oil system
may cause which of the following
problems to occur?

repeat all the steps
he has taken

call out other
engineers for
assistance

utilize a portable
rubber impeller
transfer pump

secure each
propulsion boiler

main steam stop

generator steam
stop
the superheater flow
valves

spray attemperator
outlet
an orifice in the
superheater inlet
header

high pressure turbine
steam chest
a diaphragm type
pressure controller

Uniform polishing of Decrease in lube oil
the journals.
temperature.

Spalling of the gear
teeth.

Increase in lube oil
discharge pressure.

DFT

designed maximum
pressure

overload pressure

operating pressure

Illustration

boiler water
carryover
first stage feed
heater

SG-0010

output pressure

one or more nozzles a single pressure
a low velocity steam two or more simple
with one row of
stage with two or
jet from a nozzle
impulse stages
rotating blades
more velocity stages

the superheater
temperature control
valve

46

SP091813

ABS

VER

253000

2

254414

254414

2

3

259241

1

259281

1

259493

2

255203

1

255203

250719

2

8

Steam Plants

Question
Dirty generating tube surfaces may
cause higher than normal superheater
outlet temperatures because
__________.

Choice A
the boiler must be
over fired to maintain
the required rate of
steam generation

Choice B
the temperature of
the gas leaving the
generating banks will
be lower than normal

Discharging an excessive amount of
cold water into the DC heater during
normal steaming conditions could
cause __________.
Discharging an excessive amount of
make-up feed water into the DC heater
during normal steaming conditions
could cause __________.
Dissolved and suspended solids in
boiler water are kept at minimum levels
by __________.
Dissolved oxygen can be removed from
the boiler water by __________.

flashing at the feed
pump suction

Choice C
the screen tubes
absorb excessive
heat and transfer the
increased
temperature to the
superheater
excess oxygen in the water hammer in the
feed water
economizer

loss of feed pump
suction

decreased auxiliary
exhaust pressure

using only volatile
chemicals

frequently blowing
down the boiler

Illustration

increased back
pressure

water hammer in the increased air ejector
economizer
discharge
temperature

treating the boiler
water with
phosphates
frequent surface and dumping and refilling passing the water
bottom blows
the boiler weekly
through absorbent
filters
Dissolved oxygen entrained in the feed erosion
localized pitting
caustic
water entering a boiler can cause
embrittlement
__________.
Dissolved oxygen in the condensate
steam leaks into the air leaks through the improper operation
can result from __________.
gland leakoff
turbine glands
of the gland
exhauster
Dissolved oxygen in the condensate is steam leaks into the improper operation adding make up feed
generally attributed to _________.
gland leakoff
of the gland
exhauster
Downcomers are frequently mounted
reducing heat in the improving the cooling causing suspended
outside the boiler casing on a waterdowncomers and
of the lower tube
solids in the boiler
tube boiler for the purpose of
improving water
banks
water to settle in the
__________.
circulation
water drums

47

Choice D
gas laning will result
causing overheating
of the superheater

the introduction of
oxygen scavenging
chemicals
treating the water
with chemical
scavengers
acid corrosion

vapor lock in the
condensate pump
vapor lock in the
condensate pump
providing for easy
maintenance and
repair

SP091813

ABS

VER

250721

6

Question
Choice A
Downcomers are installed between the I only
boiler inner and outer casing to
__________.
I. increase circulation rates
II. decrease the amount of heat that
they can absorb from the furnace
Downcomers are installed between the I only
inner and outer boiler casings to
__________.

250721

8

Choice C
Both I and II

Choice D
Neither I or II

II only

Both I and II

Neither I or II

II only

Both I and II

Neither I or II

II only

Both I and II

Neither I or II

Illustration

I. increase the end point of carry over
II. decrease the end point of circulation

Downcomers are installed between the I only
inner and outer boiler casings to
__________.
250721

Choice B
II only

9
I. increase the end point of
combustion
II. increase the end point of carry over
Downcomers are installed between the I only
inner and outer boiler casings to
__________.

250721

7

250719

7

250719

5

Downcomers are used in modern
boilers to __________.
Downcomers installed in water-tube
boilers function to __________.

250719

6

Downcomers installed in water-tube
boilers function to __________.

Steam Plants

I. increase the end point of
combustion
II. increase the end point of circulation
circulate water to the
mud drum
distribute feed water
within the water
drum
distribute feed water
within the water
drum

cool the superheater preheat the feed
water
decrease the end
accelerate the
point for moisture
generation of
carryover
superheated steam
decrease the end
cool the tubes
point for moisture
adjacent to the
carryover
burner throats

48

remove soot from
the firesides
accelerate water
circulation in the
boiler
ensure proper
circulation to the
water wall headers

SP091813

ABS

VER

250405

6

265800

265800

269853

263800

263800

254417

2

1

1

1

2

1

Steam Plants

Question
Due to of the curing characteristics of
plastic refractory, its use should be
avoided in __________.
During a maintenance inspection of a
turbo generator, the integral turbine
wheels are tapped with a hammer.
What condition may be indicated by a
dull non-resonating sound?
During a maintenance inspection of a
turbo generator, the integral turbine
wheels are tapped with a hammer.
What condition may be indicated by a
dull, non-resonating sound?
During an in-port watch onboard a tank
vessel while cargo operations are in
progress, with the jacking gear engaged
and running, you notice a 200 gallon
drop in the reduction gear lube oil
sump level. Which components or
conditions should be checked
immediately?
During an inspection of the main
turbine, you notice flow marks or
discoloration across the diaphragm
joints. This condition indicates
__________.
During an inspection of the main
turbine, you notice flow marks or
discoloration across the diaphragm
joints. This condition indicates
__________.
During cold ship start-up, you should
open the feed water outlet and
condensate valves to a DC heater in
order to __________.

Choice A
high temperature
areas

Choice B
burner fronts

Choice C
small repairs

Choice D
low temperature
areas

Improper rotor
support

Overstressed blade
shrouding

A cracked turbine
wheel

Normal structural
solidity

Normal structural
solidity

A cracked turbine
wheel

Overstressed blade
shrouding

Improper rotor
support

Inspect proper line- Confirm with deck
up of lube oil service officer that there was
pumps.
a change in vessel
trim.

water carryover
between stages

avoid running the
feed pump 'dry'

Verify the correct line- All of the above are
up of the lube oil
correct.
transfer tank gravity
overflow line.

normal wear for a
excessive chemical
high temperature unit treatment of the
boiler water

normal wear for a
water carryover
high temperature unit between stages

Illustration

improper seating of
the diaphragm joint

improper seating of
the diaphragm joint

excessive chemical
treatment of the
boiler water

expel nonthoroughly atomize prevent excessive
condensable vapors incoming condensate pressure
from the vent

49

SP091813

ABS

VER

259769

1

267201

253707

253707

262005

262005

263016

254422

2

1

3

2

1

1

3

Steam Plants

Question
During each two and one-half year
inspection, which test or examination of
a cargo vessel water tube boiler is
required by Coast Guard Regulations
(46 CFR)?
During high speed operation of the main
turbine propulsion unit, the heat
absorbed by the lubricating oil is
removed by the __________.
During initial starting of the standby
turbine-driven boiler feed pump, which
of the listed valves should remain
closed?
During initial starting of the standby
turbine-driven feed pump, which of the
listed valves should remain closed?

Choice A
Accumulation test

Choice B
Uptakes structural
survey

Choice C
Hydrostatic test

Choice D
Fireside inspection

lube oil purifier

sump vents

distillate cooler

lube oil cooler

Turbine exhaust
valve

Turbine steam
supply valve

Pump suction valve

Pump discharge
check valve

Pump discharge
check valve

Turbine steam
supply valve

Turbine exhaust
valve

Pump suction valve

During maneuvering, a vessel has just
proceeded from full ahead to a dead
slow condition. Which of the following
actions reflects the first response of the
gland seal regulator shown in the
illustration SE-0004?
During maneuvering, a vessel has just
reached full ahead from a dead slow
condition. Which of the following
actions reflects the first operation of the
gland seal regulator shown in the
illustration?
During normal operation of a main
propulsion turbine, the lube oil supply
temperature to the bearings should be
maintained at approximately
__________.
During normal operation, the steam flow
from the auxiliary exhaust line to the DC
heater can be closely related to the
_______.

Pilot valve "J" would Valve "D" would
move upward.
open.

Bellows and
Valve "C" would
connecting link
open.
would move upward.

Pilot valve bushing
would move
downward.

Valve "D" would
move upward.

60°F

72°F

spring pressure of
the spray valves

water level in the DC the temperature and rate of evaporation in
heater reservoir
quantity of the
the DC heater
condensate flow to
the DC heater

50

Bellows and
Needle valve would
connecting link
automatically
would move upward. become seated.

110°F

Illustration

SE-0004

SE-0004

135°F

SP091813

ABS

VER

267814

2

268409

258210

1

4

256309

3

258210

3

259181

1

254106

259785

3

4

Steam Plants

Question
During the operation of a lube oil
centrifuge, a thin emulsion interface
occurs between the lube oil and seal.
The position of this interface is
determined by the __________.
During the routine inspection of an
operating centrifugal lube oil purifier,
you notice oil discharging through the
water discharge port. Which of the
following actions should be taken?
Economy and efficiency in the operation
of a marine boiler have traditionally
been characterized by __________.

Choice A
number of disks in
the disk stack

Efficient boiler operation is indicated
when the percentage by volume of
carbon dioxide present in combustion
gases is between __________.
Efficient combustion in a boiler is
indicated by a __________.
Eight (8) ounces of oxygen, dissolved in
500,000 pounds of water, is a
concentration of __________.
Electrolytic corrosion in the condenser
circulating water system can be
reduced by __________.

Engineering Control Centers for
minimally attended machinery plants
shall, in addition to the general alarm
required by Coast Guard Regulations
(46 CFR), be provided with a/an
__________.

Choice B
outside diameter of
the discharge ring

Choice C
inside diameter of
the ring dam

Illustration
Choice D
initial volume of seal
water admitted to the
bowl

Do nothing as this is Add water to seal the Increase the bowl
normal.
bowl.
speed to balance the
water and oil
discharges.

Decrease the
temperature of the
entering oil to lower
the specific gravity.

a clear stack
(invisible stack
gases)

maintaining the fuel
oil temperature as
high as possible

a light brown haze
from the stack

a slight wisp of white
smoke from the
stack

1 and 10

10 and 11

12 and 14

15 and 17

white haze

brown haze

yellow haze

black haze

1.0 ppm

4.0 ppm

8.0 ppm

16.0 ppm

decreasing the
velocity of the
circulating water
through the
waterboxes
gyrocompass system
alarm

using zinc plates in
the waterboxes

chemically treating
the condensate
formed in the hot
well

decreasing the
volume of water in
the system

satellite
personnel alarm
telecommunications
alarm

51

all of the above

SP091813

ABS

VER

259785

5

259785

6

256301

1

255201

1

258018

1

259492

1

Question
Engineering Control Centers for
minimally attended machinery plants
shall, in addition to the general alarm
required by Coast Guard Regulations
(46 CFR), be provided with a/an
__________.
Engineering Control Centers for
minimally attended machinery plants
shall, in addition to the general alarm
required by Coast Guard Regulations
(46 CFR), be provided with a/an
__________.
Excess air must be provided to an
operating boiler to allow for
__________.
Excess free oxygen in the boiler feed
water can be the result of __________.

Choice C
Choice D
gyrocompass system all of the above
alarm

engineer's
assistance-needed
alarm

gyrocompass system satellite
all of the above
alarm
telecommunications
alarm

complete
combustion of fuel

fluctuations in boiler
steam demand

improper operation
of the DC heater

steam leaks through improper operation
the turbine glands
of the gland
exhauster
a reduced boiler fuel a decrease in boiler
oil pressure
efficiency

vapor lock in the
boiler feed pump

sodium sulfite
reacting with
dissolved oxygen
main and auxiliary
steam lines

Excessive accumulation of carbon
too much excess
deposits on a boiler burner throat ring
combustion air
and diffuser could result in __________.

heat losses up the
stack

increased heat
transfer and
overheating

caustic
embrittlement

scale formation

calcium carbonate
precipitation

condensate lines

boiler superheater
tubes

boiler generating
tubes

shower of sparks

orange colored flame dull red or black
flame

light brown flame

overheated air
injectors
increased oxygen
rejected in the
condenser

high condensate
discharge
temperature
decreased steam
consumption

insufficient
condensate sub
cooling
increased air
absorption by the
condensate

255304

1

258216

1

255309

1

255309

2

Excessive condensate depression will
result in __________.

52

decreased plant
operating efficiency
excessive
condensate
temperatures

Illustration

all of the above

Excessive alkalinity of boiler water will
cause ________.
Excessive carbon dioxide formed by
improper chemical treatment in the
boiler may cause corrosion in the
__________.
Excessive combustion air in a boiler is
indicated by the flame ends appearing
as a/an __________.
Excessive condensate depression can
result in __________.

Steam Plants

Choice A
Choice B
satellite
remote vital system
telecommunications alarm
alarm

SP091813

ABS

VER

259400

3

269504

269504

5

3

Question
Choice A
Excessive foaming in a steaming boiler superheater
can cause damage to the __________.

Excessive priming in a propulsion boiler integral superheater main steam turbine
can cause severe damage to
the_________.
Excessive priming in a propulsion boiler I Only
II Only
can cause severe damage to
the_________.
I. integral superheater
II. main steam turbine
Excessive priming in a propulsion boiler I Only
can lead to severe damage of the
__________.

269504

4

255309

3

253000

4

253000

263301

254505

3

1

2

Steam Plants

Choice B
desuperheater

II Only

Choice C
economizer

Choice D
internal feed pipe

Both A and B

Neither A nor B

Both I and II

Neither I nor II

Both I and II

Neither I nor II

Illustration

I. downcomers installed in a "D" type
boiler
II. main steam turbine reduction gears
Excessive recirculation of condensate
should be avoided, as it can cause
__________.

excessive cooling of overheating of the air the condenser hot
the condensate
ejectors
well to be completely
drained at low
speeds
Excessive soot accumulations on boiler high superheater
incomplete
reverse circulation of
generating tube surfaces can result in outlet temperature
combustion in the
the steam and water
__________.
furnace
mixture
Excessive soot deposits on the heating decreased fuel oil
increased stack
increased
surfaces of a boiler uncontrolled
and air requirements temperature
desuperheated
interdeck superheater would be
steam temperature
indicated by __________.
Excessive thrust bearing wear in a main rubbing noises when metal particles in the an intermittent
propulsion turbine rotor should FIRST jacking over the
lube oil purifier
vibration when
become apparent by __________.
main unit
changing speed

overheating of the
vent condenser

Excessive water flow beyond the design increase in the
limits of a feed water heater, will be
pressure drop
indicated by a/an __________.
between the water
inlet and outlet

high steam
temperature at the
heater outlet

decrease in the
pressure drop
between the water
inlet and outlet

53

excessive gas
liberation from the
waterside vents

low stack gas
temperature
increased
superheater outlet
temperature
taking rotor position
indicator readings

SP091813

ABS

VER

268408

1

255300

1

255100

1

255100

2

261800

5

258019

1

259494

3

263003

1

254500

1

254407

4

Steam Plants

Question
Excessive water in an operating lube oil
system can be detected by
__________.
Excessive water loss from the main
feed system can be caused by
__________.

Choice A
the amount of water
discharging from the
lube oil purifier
an atmospheric drain
tank trap frozen in
the closed position

Choice B
Choice C
sounding the lube oil examining the lube
settling tank
oil strainers

Choice D
checking oil for
unusually low
temperature
excessive
a vapor bound main a leak in the
recirculation of
condensate pump
desuperheater
condensate from the
internal gasket
outlet of the air
ejector condenser to
the main condenser

Excessively hot water returning to an
atmospheric drain tank indicates
__________.
Excessively hot water returning to an
atmospheric drain tank indicates
__________.
Expansion and contraction of a
propulsion turbine casing due to
changes in operating temperature, are
normally compensated by _______.

the condensate
recirculating valve is
open
a heating coil has
ruptured

there is a loss of
circulating water

expansion bolts at
the base of the
steam line

an expansion loop in supporting the
the exhaust line
forward end on a
deep flexible I-beam

Failure of the fuel oil service pump to
maintain fuel oil flow to the burner could
be caused by __________.
Failure to remove calcium and
magnesium from feed water before it
reaches the boiler can result in tube
__________.
Failure to use the turning gear prior to
warming up a main turbine will damage
the __________.
Feed water heaters are used aboard
steam vessels to reduce thermal shock
to the boiler and to __________.

a high relief valve
setting

excessive return line dirty fuel oil strainers excessive fuel pump
oil pressure
speed

scaling

pitting

thrust bearings

gland sealing system rotor assembly

nozzle located in the
diaphragm

increase plant
mechanical
efficiency

act as a heat sink for improve thermal
turbine bleed steam efficiency

reduce back
pressure in the
auxiliary exhaust line

Feed water is deaerated to prevent
__________.

cavitation in the feed corrosion in the
pump
boiler

a steam trap is hung a heating coil has
open
ruptured

a steam trap is hung there is a loss of
open
circulating water

54

Illustration

sludging

loss of system
vacuum

the condensate
recirculating valve is
open
corrugations in the
steam chest

erosion

all of the above

SP091813

ABS

VER

259221

2

256803

1

267203

1

252820

4

252820

5

252820

252820

256808

268902

Question
Choice A
Ferrous sulfate tends to go into solution pure with zero pH
in boiler water when the value of the
value
hydrogen ion concentration increases.
Consequently, the water in a 900 psi
boiler should be _______.

Choice B
Choice C
pure and treated to a maintained at a pH
pH value of 4.0 to
value of 7.0
4.5

Illustration
Choice D
pure and treated to a
pH value of 10.5 to
11.0

Fine adjustments to a boiler combustion fuel oil back
control system, to bring about near
pressure
perfect combustion, should be made by
manually adjusting the __________.

air volume regulators fuel/air ratio knob

forced draft fan
dampers

Fine metallic particles, which may
originate from wear or failure of the lube
oil service pump internal parts, are
prevented from contaminating the
bearings served by the lube oil system
by __________.
Fireside burning of boiler superheater
tubes is a direct result of __________.

the settling action of use of the magnetic
solid matter in the
strainers in the lube
gravity tank
oil service pump
discharge piping

combustion gases
impinging on the
tubes
slag deposit

the change of
batch centrifuging
direction and settling the lube oil at least
action within the lube once a week
oil coolers

fuel droplets striking heating carbon steel tubes becoming
the hot tubes
tubes above 750°F steam bound
improper atomization soot accumulations

waterside deposits

overheating due to
poor heat transfer

oxygen corrosion

1

Fireside burning of boiler tubes can be
a result of __________.
Fireside burning of boiler tubes is
soot accumulations
usually the direct result of __________. on a tube bank

slag accumulation on
the firesides

2

Fireside burning of boiler tubes is
high furnace
usually the direct result of __________. temperatures

gas laning in tube
banks

oxygen corrosion of
metallic surfaces

overheating due to
poor heat transfer

3

3

Steam Plants

Flame scanners are used with boiler
combustion control systems to monitor
flame quality and to __________.

shut off the fuel
secure the fuel oil
supply if flame failure service pump in the
is detected
event of a floor fire

Flexible couplings used between main
turbine rotors and reduction gear
installations are usually ________.

gear type

grid type

55

secure the forced
regulate the fuel/air
draft fan in the event ratio controller for
of a flame failure
more efficient
combustion
flexible claw type
labyrinth type

SP091813

ABS

VER

254408

3

258016

1

258016

2

259407

3

259402

4

268413

1

259402

2

259402

3

269710

1

Question
Flooding of the DC heater, due to the
addition of excessive makeup feed, is
normally corrected by the use of
__________.

Choice A
a condensate
pressure regulating
valve

Choice B
Choice C
a thermostatic steam the feed pump
regulating valve
recirculating line

Fluctuations in the atomizing steam
pressure at the burners could be
caused by a/an __________.

malfunctioning
steam trap in the
atomizing steam
system
malfunctioning
condensate drain in
the atomizing steam
system
excessive amount of
dissolved solids in
the boiler water
high total solids

incorrectly
assembled air
register

partially closed
atomizing fuel valve

Choice D
a manual or
automatic dump
valve to the reserve
feed tank or distilled
tank
partially opened
recirculating valve

incorrectly
assembled air
register

partially closed
atomizing fuel valve

partially opened
recirculating valve

excessive acidity
level in the boiler
water
high alkalinity

inadequate amount
of dissolved oxygen
in the boiler water
excessive phosphate

inadequate alkalinity
content in the boiler
water
all of the above

oil overflow

inadequate
lubrication
low water level

all of the above

neutral water

loss of cooler
effectiveness
excessive
suspended solids
acidic contamination

I only

II only

Fluctuations in the atomizing steam
pressure at the burners could be
caused by a/an __________.
Foaming and moisture carryover in a
boiler can be caused by an
__________.
Foaming in a boiler can be caused by
__________.
Foaming in a lube oil system can cause
__________.
Foaming in boiler water is a result of
__________.
Foaming in boiler water is caused by
__________.
For a gravity type lube oil system, a
remote pressure sensing device is
installed at the point of highest static
head pressure on the main unit to
enable the watch engineer to
__________.

carryover

high boiler water
alkalinity
Both I and II

Illustration

excessive surface
blows
low boiler water
alkalinity
Neither I nor II

I. be certain that the bearings are being
adequately lubricated
II. determine if there is sufficient lube oil
pressure to the main engine

Steam Plants

56

SP091813

ABS

VER

269710

3

261400

1

262605

2

262014

262013

268410

260005

250145

1

1

3

1

2

Steam Plants

Question
For a gravity type lube oil system, a
remote pressure sensing device is
installed on the main unit lube oil
header to enable the watch engineer to
__________.
I. determine if there is sufficient lube oil
pressure to the main engine
II. be certain that the bearings are being
adequately lubricated
For a large main propulsion turbine, the
most commonly used turbine thrust
bearing is the __________.
For a period of time immediately after
being secured, turbines should be
rotated slowly to avoid __________.
For the gland seal regulator shown in
the illustration (SE-0019), an increase in
gland seal pressure will result in
________.

I only

Choice A

Choice B
II only

Choice C
Both I and II

Choice D
Neither I nor II

pivoted segmental
shoe

overhung turbine
wheel

self-aligning shell

self-oiling sleeve

damage to the
distortion of the rotor excessive strain on
reduction gear teeth shaft
the quill shaft flexible
coupling
piston "F" moving
piston 'F" moving
piston 'F" moving
downward to shut
upward to shut the
downward to open
the makeup steam
makeup steam valve the makeup steam
valve "B" and open "B" and open the
valve "B" and close
the exhaust valve "E" exhaust valve "E"
the exhaust valve "E"

seizure of the main
bearing

For the gland seal regulator shown in
the illustration SE-0019, a decrease in
gland seal pressure will result in a
________.

decrease of pressure
on the bellows, and
the pivot rod will
move downward

increase of pressure
on the bellows, and
the pivot rod will
move downward

decrease of pressure
on the bellows, and
the pivot rod will
move upward

Fresh water accumulating in the
reduction gear sump may be directly
attributed to a/an __________.
From the data shown in the illustration,
what would be the speed of the L.P.
turbine rotor if the propeller shaft was
turning at 90 RPM?

inefficient gland
sealing system

faulty turbine casing lube oil cooler tube
drain valve
leak

1,545 RPM

2,794 RPM

From which of the areas listed are
condensate drains normally collected
and returned to the atmospheric
pressure drain system?

Steam whistle
separator/trap

increase of pressure
on the bellows, and
the pivot rod will
move upward

3,947 RPM

piston "F" moving
upward to open the
makeup steam
valve "B" and close
the exhaust valve "E"

Illustration

SE-0019

SE-0019

fractured main
condenser support
sheet
4,316 RPM
SE-0022

Each main feed
pump steam supply
line

57

Steam systems
operating in excess
of 150 psi

Main and auxiliary air
ejector after
condensers

SP091813

ABS

VER

250145

1

258015

3

256329

2

255701

2

256520

3

256101

5

Question
From which of the areas listed are
condensate drains normally collected
and returned to the low pressure drain
system?
Fuel oil accumulation in a boiler double
front is generally caused by
__________.
Fuel oil atomizers are used in boilers to
__________.
Fuel oil is heated before atomizing to
__________.
Fuel oil is heated before it reaches the
burners to __________.
Fuel oil is transferred from storage
tanks to the settling tanks to allow for
__________.
Fuel oil is transferred to the settling
tanks for __________.

Choice A
Steam whistle
separator/trap

Choice B
Each main feed
pump steam supply
line

Choice C
Steam systems
operating in excess
of 150 psi

Illustration
Choice D
Main and auxiliary air
ejector after
condensers

leaking fuel oil
strainers

low return line
pressure

dripping atomizers

insufficient air

control the
temperature of fuel
entering the furnace
reduce the viscosity

control the amount of
air entering the
furnace
increase the
viscosity
make it atomize
properly
purging of any large
air bubbles that have
formed

mix air and fuel
together

break fuel oil into a
fine spray

raise the fire point

lower the flash point

raise its ignition
temperature
heating to separate
water and sediment

boil off water
contamination
heating to the correct
temperature for
proper atomization

the purpose of
removing any volatile
gases present in the
fuel
steam atomizer
leaks

purging of any large heating to allow
air bubbles that have water and sediment
formed
to settle out
fuel oil heater leaks

DC heater leaks

heating to the correct
temperature for
proper burner
atomization
steam operated fuel
oil pump leaks

diffuser

air register

sprayer plate

store oil for
immediate use

precipitate out water facilitate the stripping all of the above
and solids
of sludge and water

increase its heating
ability
blending with
atomizing steam

256101

4

250250

4

256329

4

256101

2

Fuel oil may be discovered in the
contaminated drain inspection tank
when the __________.
Fuel oil passing through the burners is
divided into fine particles by the
__________.
Fuel oil settling tanks are used to
__________.

256101

3

Fuel oil settling tanks are used to
__________.

store oil for
immediate use

separate water and
solids from the fuel

Fuel oil solenoid valves at the burner
fronts should be of the manual reset
type to __________.

permit the operator
to secure each
burner during a
blackout

permit the operator
to secure each
burner after a
blackout

256601

1

Steam Plants

58

make stripping of
sludge and water
from fuel oil easier
prevent the furnace
filling with oil during a
power failure

air foils

all of the above

prevent the furnace
filling with oil after
restoration of power

SP091813

ABS

VER

256520

253200

6

Question
Choice A
Choice B
Fuel oil viscosity to the atomizer can be increasing the fuel oil mixing heavier oil
reduced by __________.
heater steam supply with the fuel

Choice C
changing the
atomizer orifice size

Choice D
increasing fuel oil
pressure

improper positioning pitted seating
of the gasket
surfaces

loose dogs

all of the above

1

Gasket leakage around boiler hand
holes may be caused by __________.
Gear surface failure caused by
exceeding the endurance limit of the
surface material is characterized by
__________.
Generally, a 12% to 14% content of
carbon dioxide in boiler flue gases
indicates __________.
Gland sealing steam is used during
steam turbine operation to prevent the
loss of __________.
Gland sealing steam is used on
propulsion turbines to prevent
__________.
Guardian valves are installed on main
propulsion turbines to __________.

initial or corrective
pitting

spalling

All of the above are
correct

269082

1

256309

1

262000

2

262000

1

262401

1

Guardian valves are installed on main
propulsion turbines to __________.
262401

3

252814

3

254111

2

257806

3

Steam Plants

Heat blisters forming on the first row of
the generating tubes are caused by
__________.
Heat introduced to the condenser by
exhausting steam is removed by the
circulation of __________.
Heating the fuel oil to an excessively
high a temperature in a fuel oil heater
will cause __________.

destructive pitting

Illustration

too much excess air a high vanadium
proper combustion of carbon deposits in
content in the fuel oil the fuel oil
the uptakes
oil

air

vacuum

temperature

steam leakage
through the casing
drains
prevent steam from provide an
leaking into the
emergency means of
astern element while quick throttle closing
the vessel is
maneuvering
prevent steam from provide an
leaking into the
emergency means of
astern element while quickly closing the
the vessel is
throttle
maneuvering
fireside deposits
low water level

overheating of the
labyrinth packing

reversed steam flow
at interstage bleeds

provide a means to
supply steam directly
to the astern element
of the turbine

prevent steam from
leaking into the
astern element at full
sea speed

provide a means to
supply steam directly
to the astern element
of the turbine

prevent steam from
leaking into the
astern element while
at full sea speed

flame impingement

waterside deposits

reserve feed water

cold condensate

low pressure drains

seawater

a loss of fuel oil
suction

over firing the boiler

leakage at the
burners

fouling of the heater

air leakage into the
turbine

59

SP091813

ABS

VER

255702

2

268615

1

268615

2

258404

2

250140

2

254409

1

250141

259264

4

1

258805

2

258805

1

268405

1

268709

2

Steam Plants

Question
Heavy slagging and high temperature
corrosion of boiler tubes can result from
using a fuel oil with high amounts of
__________.
Helical gears are preferred over spur
gears for reduction gear units due to
they fact that they __________.
Helical gears are preferred over spur
gears for steam turbine reduction gear
units due to the fact that they
__________.
High boiler water level can cause
carryover and __________.
High pressure and low pressure drain
systems are part of the __________.
High pressure steam drains are
normally discharged to the
__________.
High pressure steam drains from
systems operating at above 150 psi are
normally collected in the __________.

ash

Choice A

Choice B
Choice C
sodium chloride salts vanadium salts

Choice D
all of the above

prevent torsional
stress

eliminate pinion
deflection

produce less noise
and vibration

be easier to lubricate
at high speeds

prevent torsional
stress

eliminate pinion
deflection

produce less noise
and vibration

be easier to lubricate
at high speeds

damage to the
economizer
condensate drain
system
DC heater

warped screen tubes warped water wall
tubes
auxiliary turbine
contaminated drain
bleed system
system
atmospheric drain
reserve feed tank
line

damage to the
superheater tubes
boiler drain system

atmospheric drain
tank

contaminated drain
inspection tank

deaerating feed
water heater

distilled water tank

High salinity can be reduced in a
using the continuous steaming at a low
steaming boiler by adding caustic soda, blow down
firing rate for 24
phosphate, and then __________.
hours

adding hydrazine to
control dissolved
oxygen

adding calcium
carbonate to
precipitate solids

High temperature at the superheater
outlet would be caused by
__________.
High temperature at the superheater
outlet would NOT be caused by
__________.
Hot running bearings can be caused by
__________.
How are line shaft bearings usually
lubricated?

outer casing leakage improper turn down
ration

rapid fuel oil
atomization

excessive excess air

outer casing leakage high feed water
temperature

poor fuel oil
atomization

too much excess air

inadequate lube oil
supply
Gravity feed

drain and inspection
tank

contaminated lube oil excessive loading

all of the above

Pressure feed

Oil lubricating rings

60

Oil lubricating disks

Illustration

SP091813

ABS

VER

254600

1

262002

1

250705

1

How is boiler water forced to circulate
faster in accelerated natural circulation
boilers, than in free natural circulation
boilers?
How is the axial clearance indicator
used on a turbine?

261407

2

How is the lube oil temperature
controlled in the pressurized lube oil
system shown in the illustration?
267212

4

251302

1

261219

1

Steam Plants

Illustration
Choice C
Choice D
A water separator is The diaphragm
installed in the steam separates
supply line.
condensate from
steam.
It is directed to the
It is recirculated via
gland exhaust
the loop seal.
condenser.
Increasing the
Installing a water
Increasing the
Increasing the
density of the water. circulating pump,
inclined angle of the surface area of the
such as a hydrogenerating tubes.
economizer exposed
kineter.
to the combustion
gases.
The axial clearance After the axial
The arm of the axial A bridge gauge is
indicator is inserted clearance indicator is clearance indicator is placed across the
in the depth gauge
screwed into contact pushed so contact is bearing, and the gap
well until it rests on with the rotor, shims made with the end of between bridge and
the reference boss, are placed in the
the rotor, and the
rotor is measured by
and the reading is
clearance well, and reading on the scale the axial clearance
noted.
the thickness is
is noted.
indicator.
measured.

Question
Choice A
Choice B
How is a diaphragm type steam whistle High temperature
Condensate drains
protected from damage due to
steam is used in the from the horn each
entrained condensate?
whistle.
time the whistle is
blown.
How is an excess of turbine gland seal It exhausts to
It drains to the
steam remedied?
atmosphere.
makeup feed tank.

Sea water flow
through the cooler is
adjusted by opening
or closing the inlet
valve.

How is the nozzle in a nozzle reaction
Press fit
safety valve held in place?
How many Curtis stages are contained 1
in the turbine shown in the illustration?

A thermostatic valve
diverts sea water
flow around the
cooler.

A thermostatic valve
sensor determines
temperature
downstream of the
L.O. coolers and the
valve diverts lube oil
flow through or
around the cooler
accordingly.

Lube oil flow through
the cooler is adjusted
by changing the
speed of the lube oil
pump.

Lock nut

Machine threads

Spot weld

2

3

only a reaction
turbine stage is
shown

61

SE-0011

SE-0003

SP091813

ABS

VER

268900

1

261233

1

250101

6

250101

10

258604

1

258650

3

250033

251400

250724

257101

1

3

5

1

Steam Plants

Question
How many pinion gears are required in
an articulated, double reduction gear
set for a cross-compounded turbine?

Choice A

Choice B

Choice C

Choice D

Two

Four

Six

Eight

How many pressure drops occur in the
turbine stage shown in the illustration?

One

Two

Three

Four

Identify the system shown in the
illustration.
Identify the system shown in the
illustration.
If a boiler begins to pant and vibrate you
should __________.
If a boiler fire is blown out by a
flareback, you should immediately
__________.
If a boiler generates saturated steam at
125.3 psig, how much heat is required
to change the water into steam if the
feed water temperature is 240°F?

Bleed steam

Auxiliary steam

High pressure drains Auxiliary condensate

Bleed steam

Auxiliary steam

High pressure drains Auxiliary condensate

check the fuel oil
service pumps
increase the forced
draft blower speed

secure the fires

increase the air

If a boiler is being operated with the
inlet feed water bypassing the
economizer, which of the following is
true?

The fuel
consumption will
increase for the
same boiler load.

Illustration

SE-0003

30.5 Btu/lb

start the standby fuel secure the fuel
oil pump
supply to the boiler
burners
116.5 Btu/lb
582.7 Btu/lb

SG-0024
SG-0005

reduce the steam
demand
relight the fires with a
torch
983.4 Btu/lb
SG-0004

There is always the
danger of burning
the economizer
tubes.

Less heat is actually all of the above
being transferred to
the superheated
steam because of
the decrease in feed
water flow

If a boiler is being steamed at a high
excessive strain on
firing rate, blowing down a water wall
boiler blow down
header without taking any other
lines
precaution could result in __________.

erratic operation of
the automatic feed
water regulating
valve

load imbalance
between other
boilers on the line

interruption of water
circulation

If a boiler is brought on the line with its thermal shock
steam pressure much higher than that
of the boiler already on the line, there is
danger of __________.

priming and
carryover

low water

an overloaded
superheater

62

SP091813

ABS

VER

258604

3

258002

258002

1

4

251707

2

252831

1

258004

2

253708

254000

1

1

269929

1

252817

1

Steam Plants

Question
If a boiler is panting, which of the
following actions should be taken?
If a boiler is smoking black and
increasing the boiler front air box
pressure does not reduce the smoke,
the cause can be __________.
If a boiler is smoking black and
increasing the boiler front air box
pressure does not reduce the smoke,
the cause can be __________.
If a boiler superheater safety valve is
leaking at normal working pressure, the
quickest method of determining and
possibly solving the problem is to
__________.
If a boiler tube bank baffle carries away,
or burns through, there will be
__________.
If a burner were inserted too far into the
boiler furnace, it could cause carbon
deposits on the __________.
If a centrifugal main feed pump were
operated at shutoff head with the
recirculating line closed, which of the
following conditions could occur?
If a feed pump failure causes the boiler
water to drop out of sight in the gage
glass, the engineer should FIRST
__________.
If a higher than normal water level is
observed through the inspection port of
a flash evaporator, you should suspect
__________.
If a large number of tubes fail in a
steaming boiler, the __________.

Choice A
Decrease the air
pressure to the
burners.
forced draft fan
failure

Choice B
Increase the air
pressure to the
burners.
dirty atomizers

forced draft fan
failure

heavy soot on tubes low fuel oil
temperature

high air heater
temperature

blow out the valve by
several short lifts
with the hand lifting
gear

fully open the
superheater safety
drain valve for
several seconds

raise the firing rate
until the leakage
stops

incomplete
combustion
furnace opening

localized overheating excessive gas
of the water drum
turbulence in the
furnace
burner tip
air cone

A decreased water
level in the DC
heater.

An increased water
level in the steam
drum.

secure the fires,
steam stops and
then add water

secure the fires,
reduce steam load
and start standby
feed pump

a leak in the feed
water heater

improper vacuum

a malfunctioning
brine pump

a clogged
desuperheater water
strainer

steam pressure will
rise rapidly

fires will always be
extinguished

water level will drop
rapidly

fires will hiss and
sputter

63

Choice C
Increase the fuel oil
pressure.

Choice D
Increase the fuel oil
temperature.

Illustration

heavy soot on tubes high ambient air
temperature

lower the firing rate
until the leakage
stops

fireside burning of
boiler tubes
register doors

Flashing at the
suction side of the
pump.

Excessive
diaphragm seal wear
in the feed water
regulator.
reduce the steaming reduce the steaming
rate and then cool
rate and then add
the boiler with the
water
force draft fan

SP091813

ABS

VER

252802

3

268310

1

268104

4

268104

1

254122

2

268104

5

258651

1

252809

250004

1

1

Steam Plants

Question
Choice A
If a large number of tubes has failed,
securing the fires,
you can minimize damage to a boiler by steam stops, and
__________.
relieving boiler
pressure
If a line shaft bearing begins to
increase lube oil
overheat, the shaft speed should be
pressure to the
reduced. If overheating persists, you
bearing
should then __________.

Choice B
securing the fires,
feed stops, and
leaving the boiler cut
on the line
decrease lube oil
pressure to the
bearing

If a lube oil pump fails to build up
discharge pressure when first started,
the cause could be the __________.
If a lube oil pump fails to build up
discharge pressure, the cause could be
the __________.
If a main condenser were operating with
a vacuum of 28.09 in. Hg, a condensate
discharge temperature of 95°F, a
seawater inlet temperature of 64°F and
an overboard temperature of 72°F,
which of the following would represent
the condensate depression?

bypass valve is
closed

discharge valve is
open

Choice C
Choice D
increasing the feed speeding up the
water supply to keep forced draft fans to
the boiler cool
blow steam up the
stack
apply emergency
flood the bearing
cooling water
with a higher
externally to the
viscosity oil to
bearing
provide emergency
lubrication and
cooling
suction pressure is shaft packing gland
high
requires adjustment

bypass valve is
closed

discharge valve is
open

suction vacuum is
high

suction valve is
closed

0.3 in. Hg

0.5 in. Hg

5.5°F

3.24°F

If a main lube oil pump fails to build up
discharge pressure, the cause could be
the __________.
If a major flareback occurs to a boiler,
which of the following actions should be
immediately taken?
If a pressure drop does not exist across
the superheater in a steaming boiler
__________.

bypass valve is
closed

gravity tank is
overflowing

Secure the forced
draft fan.

Secure the fuel to
the burners.

this is a normal
condition

the drum safety
valve is about to lift
ahead of the
superheater safety
80%

Illustration

SG-0026

If a quantity of saturated steam consists 10%
of 90 percent steam and 10 percent
moisture, the quality of the mixture is
__________.

64

discharge strainer
magnets have not
been cleaned
Secure all fire room
ventilation.

shaft packing gland
requires tightening

there is no steam
flow through the
superheater

the feed water
temperature is too
low

90%

100%

Purge the fuel oil
system.

SP091813

ABS

VER

259243

1

254305

2

269922

3

254800

254800

253006

2

1

1

269083

5

258600

7

258600

4

258300

8

Steam Plants

Question
If a routine boiler water test indicates
high salinity, you should blow down the
boiler to reduce salinity and then
__________.
If a salinity alarm system indicates 2.5
grains per gallon at the main
condensate pump discharge, your first
action should be to __________.
If a severe leak develops in the electrohydraulic steering gear, which of the
listed conditions could result?
If a ship is to be laid up for an indefinite
period, the saltwater side of the main
condenser should be __________.

Choice A
add carbonates to
control sludging

Choice B
Choice C
Choice D
treat the boiler water reduce the firing rate increase the firing
with phosphates
to prevent scaling
rate to prevent
foaming

blow down the
boilers and add
make up water

chemically test the
condensate for
chloride content

increase the
open the main
hydrazine dosage in condensate
the condensate line recirculating valve

Loss of vessel
steering

Overheating of the
gyrocompass

Jamming of the sixway valve

Jamming of the
follow-up device

left filled with
saltwater with the
sea valves closed

left filled with
saltwater with the
sea valves open

drained and refilled
with saltwater after
closing the sea
valves
completely drained
of water

drained and dried out
after closing the sea
valves

If a ship is to be laid up for an indefinite filled with moist air
period, the steam side of the main
condenser should be __________.

If a soot blower element does not
revolve freely, the most likely cause
would be __________.

left under a vacuum

a seized blower head an improper blowing warpage of the soot
bearing
arc cam setting
blower element

If a spring bearing begins to run at an
abnormally high temperature, you
should __________.

increase the water
immediately stop the reduce the shaft
flow to the main lube shaft to prevent
speed and supply
oil cooler
seizing
emergency cooling
water to the spring
bearing housing
If a steaming boiler begins 'panting,' the too much air for
excessively high
excessively high fuel
probable cause is __________.
proper combustion
furnace temperature oil temperature
If a steaming boiler is not supplied with boiler will pant and
fires will hiss and
boiler will smoke
sufficient air for proper combustion, the rumble
sputter
white
__________.
If a tube failure results from low water
immediately secure increase the feed
immediately secure
level and the water level can not be
the forced draft fans pump speed to
the fuel oil supply to
maintained in sight in the gage glass,
maximum
the burners
you should __________.

65

Illustration

pressurized to
approximately 5 psig
with nitrogen, 99.5%
pure by volume
insufficient steam
pressure to the soot
blower element
reverse direction of
the shaft to flush out
the bearing

insufficient air for
proper combustion
fires will be too hot

blow down the gage
glass to verify a low
water condition

SP091813

ABS

VER

252802

2

267211

2

269700

3

258300

252107

256304

256304

256304

4

2

2

3

1

Steam Plants

Question
If a tube failure results from low water
level and you cannot maintain water in
sight in the gage glass, you should
__________.
If a tube should leak in an operating
main steam turbine lube oil cooler, the
water will not immediately contaminate
the oil because the __________.

Choice A
Choice B
immediately secure increase the feed
the forced draft fans pump speed to
maximum

Choice C
immediately secure
the fuel oil supply to
the burners

Choice D
blow down the gage
glass to verify a low
water condition

second-stage
discharge valve will
open

plug type bypass
valve will open

cooling pump would oil pressure is
automatically shut off greater than the
water pressure

If a turbine bearing high temperature
alarm sounds, you should immediately
__________.
If a vessel is steaming at a steady rate,
and the water level has dropped out of
sight in the boiler gage glass, the FIRST
corrective action should be to
__________.
If a water-tube boiler tube has sagged
and must be plugged, a hole must be
made in the tube wall to prevent
__________.
If an analysis of boiler flue gas
determines there is 100% excess air
for combustion, you should expect the
flue gas to have a nitrogen content of
approximately __________.

increase lubricating
oil flow

increase cooling
water flow

slow the turbine

open the feed water
bypass regulator

blow down the boiler slow down the
gauge glass
engines

If an analysis of boiler flue gas
determines there is 50% excess air for
combustion, you should expect the
nitrogen content of the flue gas to be
approximately __________.
If an analysis of boiler flue gas
determines there is no excess air for
combustion, you should expect the
nitrogen content of the flue gas to be
approximately __________.

stop the turbine

cut out the fires

quick burnout of that pressure buildup in
tube
that tube

a complete sagging
failure

tube cracking due to
overheating

21.0%

33.0%

79.0%

87.0%

79.0%

33.0%

21.0%

14.0%

10.5%

14.0%

21.0%

79.0%

66

Illustration

SP091813

ABS

VER

259003

1

258700

1

258700

2

264200

2

259401

2

259432

1

267837

1

250724

3

253704

1

Steam Plants

Question
If an automatically fired burner ignites,
but repeatedly goes out within two
seconds, the cause could be a/an
__________.
If an oil fire occurs in the double casing
of a steaming boiler, you should
__________.
If an oil fire occurs in the double casing
of a steaming boiler, you should
__________.

Choice A
Choice B
faulty pressure signal dirty flame scanner
to the time delay
window
relay circuit

Illustration
Choice C
Choice D
burned out solenoid excessively high fuel
coil in the low fire oil oil temperature
valve

increase the forced
draft fan speed

secure the fuel oil
apply water with a
supply to the burners smooth bore nozzle

If an operating propulsion unit requires
excessive quantities of gland sealing
steam, you should suspect a
__________.
If boiler priming occurs, you should
immediately __________.

vacuum leak in the
condenser shell

flooded main
condenser hot well

increase the
steaming rate

reduce speed and
open throttle drains

secure the feed
water supply to the
boiler
immediately secure
the feed water supply
to the boiler

increase the forced
draft fan speed

secure the fires and
air supply and
activate the steam
smothering system
worn or damaged
labyrinth packing

apply water with a
smooth bore nozzle

lift the safety valves
with the hand easing
gear
feed water crossover
line

open the boiler
bottom blow valve

restriction in the
gland leak off piping

If boiler water chemicals are decreasing economizer tubes
in one boiler and increasing in the other
boiler, while both are steaming at
normal rates, a leak probably exists in
the __________.

superheater tubes

If contaminated lube oil were allowed to
settle undisturbed in a tank, into which
layers would the contaminants
separate?
If it becomes necessary to remove
water from a pressurized main boiler, it
should be directed __________.
If it is necessary to operate a turbine
driven main feed pump at shut off
head, or at less than 20% of its rated
capacity, what will prevent the pump
from overheating?

Sediment on the
bottom, oil in the
middle, and water on
top.
into the bilges

Sediment on the
bottom, water in the
middle, and oil on
top.
overboard through
the bottom blow line

Water on the bottom, Water on the bottom,
oil in the middle, and sediment in the
sediment on top.
middle, and oil on
top.
into the cofferdam
into the reserve feed
tank

Throttling of the
steam supply valve.

Throttling of the
liquid discharge
valve.

A bypass or
recirculating line led
back to the pump
impeller eye or
suction.

67

internal
desuperheater flange

A bypass or
recirculating line led
back to the source of
suction supply.

SP091813

ABS

VER

269502

1

250162

269702

253304

250251

250162

256364

1

1

1

2

3

2

Steam Plants

Question
If it should become necessary to
abandon a compartment because of the
danger of a large steam leak on a
boiler, which of the following actions
represents the best avenue of escape?

Choice C
Escape by way of a
fire room ladder to
the outer deck.

Choice D
Use fire room
elevator to an upper
deck.

If live steam is supplied directly to the
main and/or auxiliary atmospheric drain
tank heating coils, the collected drains condenser
tank
in the 'clean' section of the
contaminated drain inspection tank are
removed directly to the __________.

deaerating feed
water heater

makeup feed water
tank

If lube oil pressure to the main turbines applying the pony
is lost while underway at sea speed, the brake
rotor should be stopped immediately.
This is accomplished by __________.

tightening the stern
tube packing gland

securing all steam to admitting astern
the turbines
steam to the turbines
after securing ahead
steam

If manual control of the water level in a
steaming boiler is required, the proper
method of control is with the auxiliary
feed __________.
If oil is found in the main fuel oil heater
steam drain system, which of the
actions listed should be taken first?

stop valve

pump speed control

If oil is observed in the steam drains
from a fuel oil heater, you should
__________.

Choice A
Escape through
another
compartment on a
higher level.

stop-check valve

Choice B
Escape through
another
compartment on a
lower level.

Change over fuel
Shift over to the
supply to diesel fuel. standby heater and
monitor
contaminated drain
tank for additional
traces of oil.
increase the fuel oil shift the drains to the
pressure to the
atmospheric drain
heater
tank

If one burner of a group of operating
left wide open
steam atomizing burners in a steaming
boiler is cut out, the register doors for
that burner should be __________.

left cracked open

68

Illustration

pump pressure
control

Bottom blow the
Shift over to the low
boiler using the
fuel oil suction on the
continuous blow line. day tank.

transfer operation to
another heater and
secure the original
heater
closed halfway

increase the steam
pressure to that
heater
closed tightly

SP091813

ABS

VER

257811

1

256502

1

268410

2

263007

1

253900

1

253900

2

258900

2

254418

254418

268401

1

3

4

Steam Plants

Question
If one fuel oil strainer of a duplex unit
becomes clogged while the vessel is
steaming at sea, the FIRST action
should be to __________.
If one fuel strainer of a duplex strainer
unit becomes clogged while your vessel
is underway, you should first
__________.
If saltwater leaks into and contaminates
the main lubricating oil system, which of
the following remedial actions should be
taken?

Choice A
Choice B
clean the dirty
change the oil flow
strainer as quickly as over to the clean
possible
side

Choice C
stop the fuel oil
service pump

Choice D
open the strainer
bypass valve

secure the engine
immediately

stop the fuel oil
pump

open the strainer
bypass valve

change the oil flow
over to the clean
side

Locate the leak and Disengage the
seal it off when time jacking gear and
permits.
allow contaminated
oil to cool to engine
room temperature.
If steam is admitted to the main
Uneven warming of Destruction of the
propulsion turbine with the jacking gear the turbine.
jacking gear.
engaged, which of the following
problems can occur?
If the bellows in a thermo-hydraulic feed increase only
decrease only
water control valve ruptures, the boiler
water level will __________.
If the bellows in a thermo-hydraulic feed decrease only
increase only
water control valve ruptures, the boiler
water level will __________.
If the boiler fires are extinguished by
secure the burner
secure the settler
water contamination in the fuel oil, you valves
tank suctions
should FIRST __________.
If the boiler water and condenser hot
increase the speed open the feed pump
well levels are normal, but the DC
of the condensate
recirculating valve
heater level is only 30% of full, you
pump
wide
should __________.
If the boiler water level is normal, the
prime the
bypass the vent
main condenser hot well level is normal, condensate pump
condenser
and the DC heater level is 40% full, you
should __________.
If the bowl of a centrifugal purifier is
bearings will be
will begin to lose its
improperly reassembled with O-ring
permanently
water seal
seals that have become hard and flat, damaged
the centrifuge __________.

69

Illustration

Run the engines at
idle and prevent the
circulation of
contaminated oil.

Seal off the leak and
promptly remove and
replace all
contaminated oil
from the system.
A possibility of
Excessive tooth
shearing the jacking stress on the high
gear flexible
pressure first
coupling.
reduction pinion.
increase initially and decrease initially and
then decrease
then increase
decrease initially and increase initially and
then increase
then decrease
reduce the load on
the boiler

purge the boiler
furnace

open the makeup
feed

bypass the vent
condenser and thirdstage feed heater

slow the main unit

open the makeup
feed vacuum drag
line

will discharge oil to
the main sump as
dirty as the input

bowl will rotate at a
lower speed

SP091813

ABS

VER

255308

2

255308

259002

255005

255205

255315

269500

252600

253514

1

1

1

1

1

1

1

1

Steam Plants

Question
If the condensate level in the loop seal
of the air ejector intercondenser is lost,
__________.
If the condensate level in the loop seal
of the intercondenser is lost,
__________.
If the control air pressure for an
automatic combustion control system is
lost during maneuvering, you should
immediately __________.
If the cooling water flow through the air
ejector intercondensers and after
condensers is inadequate, which of the
problems listed will occur?
If the DC heater relief valve lifts
frequently, the cause can be excessive
__________.
If the drain regulator used in the
operation of the combined L.P. feed
water heater, shown in the illustration, is
incorrectly set to maintain too high of a
level (condensate level covers
approximately the lower half of tubes in
the first stage heater) the resulting
operation will __________.

Choice A
no condensate will
flow through the
system
no condensate will
flow through the
system
switch to manual
control

Choice B
air will be drawn
back into the main
condenser
some air will be
drawn into the main
condenser
blow down the air
receiver

Choice C
the air ejector will not
transfer heat to the
condensate
the air ejector will not
operate

Air ejector nozzles
will erode.

After condenser will
be flooded.

DC heater level will
rise

If the engineer on watch has reason to open the auxiliary
doubt the accuracy of the water level
feed line
showing in the boiler gage glass, he
should FIRST __________.
If the engineer on watch has reason to speed up the main
doubt the accuracy of the water level
feed pump
shown in the boiler gage glass, he
should __________.
If the entire pneumatic control to a multi- constant pump
element feed water regulator fails, the pressure regulator
feed water valve is controlled by
__________.

the air ejector will
become overheated

Main condenser
absolute pressure
will increase.

feed water
recirculated from the
feed pump
cause the feed water cause the feed water
outlet temperature to temperature to
decrease
increase above the
designed outlet
temperature

makeup feed
introduced to the
system
cause the automatic
make-up feed valve
to cycle open

blow down the gage replace the gage
glass
glass

start the standby
feed pump

SG-0025

open the auxiliary
feed line

blow down the gage start the standby
glass
feed pump

remote manual
control regulator

single-element feed
water regulator

70

Illustration

attempt to restart the secure the boilers
air compressor

condensate supplied auxiliary exhaust
to the DC heater
steam pressure
cause no adverse
operating effect

Choice D
the air ejector will
overheat

local manual control

SP091813

ABS

VER

253514

3

258901

3

258901

7

258901

8

257107

6

258223

1

257802

2

257806

252601

262004

5

1

1

Steam Plants

Question
If the feed water flow sensor of a multielement feed water regulator fails, the
valve will be controlled as a
__________.
If the fires in a boiler furnace begin
sputtering or hissing, you should
suspect __________.
If the fires in both boilers start to
sputter, you should immediately
__________.
If the fires start sputtering while
steaming under steady conditions,
which of the actions listed should be
taken?
If the fires to a steaming boiler have
been accidently extinguished, you
should not relight any burner until
__________.
If the flue gas oxygen content is too
high, you should __________.

Choice A
single element feed
water regulator

Choice B
Choice C
double element feed triple element feed
water regulator
water regulator

Choice D
local manual control
device

excessive fuel
pressure at the
burners
shift feed suction to
the double bottom

loss of fuel pump
suction

water contamination
of the fuel oil

speed up the fuel oil shift settlers
pump

Start the standby fuel Increase the fuel oil
oil service pump.
pressure.

all burning embers in the furnace
the furnace are
refractory has cooled
extinguished
below ignition
temperature
adjust the
adjust the fuel oil
combustion control service system
system
If the fuel oil temperature flowing to the fuel service pump
boiler will produce
burners is too low, the __________.
will lose suction
heavy black smoke
If the fuel oil temperature in the fuel oil
heater attains an excessive
temperature, what will happen?

low fuel oil
temperature

Illustration

shift to the low
suction

Shift over to another Shift suction to
fuel strainer.
another settling tank.

the boiler furnace
all fuel has been
has been thoroughly recirculated from the
purged
burners
increase the forced
draft fan speed

increase the fuel oil
temperature

boiler will produce
dense white smoke

fuel service strainers
will become clogged

Carbon deposits will The fuel heater relief The fuel oil pump will The fuel oil
build up on the
valve will open
lose suction.
recirculating valve
heating surfaces.
immediately.
will automatically
close.
broken feed water
restricted gage glass properly operating
high water level
regulator
line
feed pump

If the gage glass water level remains
constant in a steaming boiler while
maneuvering, the most probable cause
is a __________.
If the gland assembly, shown in the
A slight vacuum
illustration, is located at the forward end would exist at "E"
of the high pressure turbine, and the
vessel is operating at full speed ahead,
__________.

sealing steam would sealing steam would this gland would be
only enter at "F"
enter at "E" and "F" self sealing and
from the LP turbine provide sealing
steam to the other
glands

71

SE-0006

SP091813

ABS

VER

262004

2

258300

269702

254122

6

4

1

254122

3

268104

2

264603

1

Steam Plants

Question
If the gland assembly, shown in the
illustration, is located at the forward end
of the high pressure turbine, and the
vessel is operating at minimum
maneuvering speeds, which of the
following statements is true?
If the low water level alarm sounds on
an automatically fired boiler, and the low
water cutout fails to function, you must
immediately __________.

Choice A
Choice B
Choice C
Choice D
Sealing steam would Sealing steam would Sealing steam would This gland would be
enter at "E".
enter at "F".
enter at "E" and "F". self sealing and
provide sealing
steam to the other
glands.
blow down the gage
glass to determine
where the water level
is

increase the feed
water supply to
maintain the water
level

the turbine bearings
will immediately fail

emergency
lubrication can be
supplied through the
use of the hand
pump

If the main condenser were operating at
a vacuum of 28.5"Hg, a condensate
discharge temperature of 86°F, a
seawater inlet temperature of 72°F, and
a seawater outlet temperature of 79°F,
what would be the condensate
depression?
If the main condenser were operating at
a vacuum of 28.7"Hg, a condensate
discharge temperature of 81°F, a
seawater inlet temperature of 72°F, and
a seawater outlet temperature of 79°F,
what would be the condensate
depression?
If the main lube oil pump fails to build
up discharge pressure, the reason
could be the __________.
If the main propulsion turbine begins to
vibrate severely while you are
increasing speed, you should
__________.

4 degrees
Fahrenheit

7 degrees
Fahrenheit

0.7 inches Hg

SE-0006

start the emergency secure the fires to
feed water injector to minimize damage to
restore the normal
the boiler tubes
water level

If the main and standby lube oil service an emergency supply the reduction gear
pumps of the main engine fail while
of oil in the gravity
bearings will
underway at sea, __________.
tank will provide time immediately fail
to crash stop the
turbine and gears
0.2 inches Hg

Illustration

SG-0026

0.2 inches Hg

0.3 inches Hg

4.0 degrees
Fahrenheit

12 degrees
Fahrenheit
SG-0026

bypass valve is
closed

discharge valve is
open

shaft packing gland
requires adjustment

open the throttle
wider to pass
through the critical
speed

hold the turbine at
that speed until
vibration stops

stop the turbine and immediately slow the
not answer any more turbine to see if the
bells
vibration will stop

72

suction pressure is
too high

SP091813

ABS

262409

269702

259739

259739

254118

251554

269927

254300

VER

2

2

1

2

2

2

4

2

Steam Plants

Question
If the main propulsion turbine speed
percentage is increase from 30% to
60%, what percentage of horsepower is
required when the new speed is
attained as shown in the illustrated
graph?
If the main turbine bearing lube oil
pressure drops to 'zero' and cannot be
restored immediately, you should
__________.

Choice A
10%

Choice B
20%

Choice C
30%

Choice D

Illustration

40%
SE-0018

notify bridge and
crash stop the
engine

reduce turbine rotor
speed until lube oil
sump level returns to
normal

If the maximum steam generating
capacity of a boiler is increased Coast
Guard Regulations (46 CFR) require
that the safety valve's __________.

lifting pressure be
increased

relieving capacity be reseating pressure
checked
be increased

If the maximum steam generating
capacity of a boiler is increased, Coast
Guard Regulations (46 CFR) require
that the safety valves' __________.

relieving capacity be lifting pressure be
checked
increased

reseating pressure
be increased

blow down be
reduced

If the pressure becomes excessive in
the auxiliary exhaust system of a steam
propulsion plant, the excess steam will
normally be dumped to the
__________.
If the pressure control disk in the soot
blower illustrated, is moved to a higher
position, the result will __________.

deaerating feed tank vent condenser

reduced steam
system

main condenser

cause the soot
blower to rotate
faster

cause the soot
blower to rotate
slower

If the rated distillate production of a
submerged tube type evaporator cannot
be maintained with the supplied
maximum steam pressure, the
evaporator __________.
If the salinity indicator located in the
main condensate pump discharge
piping causes an alarm to sound there
is a danger of __________.

chemical feed must
be increased

has a serious brine
leak

decrease the amount increase the steam
of steam valve travel pressure in the
rotating blower
element
condenser pressure heating surfaces
should be raised
have excessive scale
buildup

low condensate
depression

low condensate
temperature

73

reduce turbine rotor strike down makeup
speed and pump
lube oil from the
lube oil with the hand gravity tanks
emergency pump
blow down be
reduced

SG-0023

salting up the boilers contaminating the
distilled tank

SP091813

ABS

VER

255306

2

250026

4

256302

1

253514

4

255350

1

258003

2

256300

256300

1

4

Steam Plants

Question
If the salinity indicator periodically
registers high salinity in the main hot
well, the cause may be __________.
If the saturation pressure of water is
increased, the relative values shown on
the illustrated graph of SG-0001 will
change. According to pertinent
information found in the steam tables of
SG-0004, this will result in __________.

Choice A
leaking air ejector
condenser tubes

Choice B
leaking tubes in the
third-stage heater

Choice C
excessive water
pressure in the lube
oil cooler
a decrease in the
height of line 4

Choice D
a contaminated
distilled water tank

a decrease the
length of line 4

no change to the
length of line 4

If the stack temperature is higher than
normal, this could indicate
__________.
If the steam flow input device to a twoelement feed water regulator valve fails,
the regulator operates as a
__________.
If the steam whistle shown in the
illustration produces a poor, rattling
tone when blown, the probable cause is
a/an __________.
If the temperature of the fuel oil entering
an atomizer is too low, the burner will
__________.
If the theoretical quantity of dry air
required to burn one pound of fuel oil is
13.75 pounds, what is the weight of air
per pound of fuel when operating a
boiler at 5% excess air?
If the theoretical quantity of dry air
required to burn one pound of fuel oil is
13.75 pounds, what weight of air will be
necessary to burn one pound of fuel to
operate a boiler at 10% excess air?

low fuel oil back
pressure

too much excess air high feed water
pressure

external boiler casing
leakage

constant pump
pressure regulator

remote manual
control regulator

single-element feed
water regulator

local manual control

insufficient steam
pressure

defective pilot valve

excessive back
cover tightness

a loose back cover

produce smoke
white
14.44 pounds

require more fuel for produce heavy black require more excess
atomization
smoke at any load
air for combustion
condition
15.13 pounds
15.81 pounds
16.50 pounds

14.44 pounds

15.13 pounds

Illustration

no change in the
height of line 4
SG-0001
SG-0004

74

15.81 pounds

GS-0099

16.50 pounds

SP091813

ABS

VER

256300

2

256300

258300

258300

258301

3

2

3

2

258300

7

258813

1

266406

1

Steam Plants

Question
If the theoretical quantity of dry air
required to burn one pound of fuel oil is
13.75 pounds, what will be the weight
of the air necessary to burn one pound
of fuel when operating a boiler at 15%
excess air?
If the theoretical quantity of dry air
required to burn one pound of fuel oil is
13.75 pounds, what will be the weight of
the air necessary to burn one pound of
fuel to operate a boiler at 20% excess
air?
If the water level cannot be seen in the
lower part of the boiler gage glass,
which of the following actions must be
carried out immediately?
If the water level in a steaming boiler is
dropping rapidly and cannot be kept at
the normal level by standard practices,
you should __________.
If the water level in one boiler of a two
boiler plant rapidly falls out of sight,
which of the following actions should be
carried out FIRST?
If the water level in the boiler water
gage glass is not in sight, and the
automatic feed water regulator is in the
closed position, the __________.
If there is a sudden drop in the outlet
temperature of an uncontrolled
superheater, you should __________.
If two turbo-generators with the same
no-load speed settings are operating in
parallel, the unit whose governor has
the lesser speed droop will
__________.

Choice A
14.44 pounds

Choice B
15.13 pounds

Choice C
15.81 pounds

Choice D
16.50 pounds

14.44 pounds

15.13 pounds

15.81 pounds

16.50 pounds

Increase the feed
water going to the
boiler.

Check the DC heater Blow down the boiler. Secure the boiler
water level.
fires.

secure the fires and
then secure the
steam stop

secure the steam
blow down the gauge speed up the feed
stop and then secure glass to find the true pump to raise the
the fires
water level
water to normal

Illustration

Secure the fuel oil to Raise the feed pump Blow down the gage Secure the steam
that boiler.
pressure.
glass.
stop to that boiler.

safety valve should
be lifted by hand

fires should be shut
off

increase the firing
rate

bypass the air heater check for high water reduce the forced
level in the drum
draft fan speed

assume the smaller
share of the load

assume the larger
share of the load

75

boiler water gage is
faulty

bottom blow should
be opened

have poor sensitivity have poor power
characteristics
response

SP091813

ABS

VER

250200

3

250200

253201

269700

269702

4

1

2

3

Steam Plants

Question
If water hammer develops while
opening the valve in a steam line, which
of the following actions should be
taken?

Choice A
Shut the steam valve
at once, open the
drain valves until all
moisture is drained,
shut the drain line
valves, and slowly
open the steam
valve again.

Choice B
Continue to fully
open the steam
valve as the drain
line valves are
opened until all
moisture is drained,
shut the drain line
valves.

If water hammer develops while
opening the valve in a steam line, which
of the following actions should be
taken?

Shut the steam valve
at once, open the
drain valve until all
moisture is drained,
shut the drain line
valve, and slowly
open the steam
valve again.

Continue to fully
open the steam
valve and partially
open the drain line
valve until all
moisture is drained
and then shut the
drain line valve.

Choice C
Stop opening the
steam valve, open
the drain line valves,
resume opening the
steam valve slowly,
and shut the drain
line valves after the
steam valve is open
fully.

Illustration
Choice D
Increase the speed
of opening the steam
valve to rapidly heat
the line to stop the
water hammer.

Stop opening the
steam valve, open
the drain line valve,
resume opening the
steam valve slowly,
and shut the drain
line valve after the
steam valve is open
fully.
If while filling the boiler a newly installed coat the gasket with retighten the stud nut use a double gasket
gasket on a water-tube hand hole plate graphite
with an air wrench
weeps, you should __________.

Increase the speed
of opening the steam
valve to rapidly heat
the line to stop the
water hammer.

If you are notified that one of the turbine Immediately reduce
bearings is overheated, which of the
speed.
following actions should you take first
as the watch engineer?

Increase cooling
water supply to the
lube oil cooler.

If you are underway at full speed on a
vessel fitted with a main propulsion
turbine pressure lubrication system,
which of the following actions will be
necessary upon complete loss of lube
oil pressure?

Secure main steam
to the turbines and
break vacuum on the
main plant
immediately.

Immediately stop the Increase lube oil
turbine.
pump discharge
pressure and check
the strainer for metal
particles.
Slow the main
First close the ahead Secure main steam
engines and strike
throttle valve, then
to the turbines
down additional oil
open the astern
immediately and
from the gravity tank. guardian valve, and engage jacking gear.
then open the astern
throttle to admit
astern steam as
quickly as possible.

76

center and tighten
with correct size
wrench

SP091813

ABS

VER

269918

2

269918

3

257811

2

258002

2

255200

1

258002

5

264605

2

252205

1

258802

3

Steam Plants

Question
If you hear a 'crackling' sound coming
from a salt water centrifugal pump
casing, the most probable cause of the
noise would be __________.
If you hear a 'crackling' sound coming
from a salt water centrifugal pump
casing, the most probable cause of the
noise would be __________.
If you noted a large difference in the
pressures indicated by a duplex
pressure gage to the fuel oil system
strainer, you should __________.
Improper atomization can be caused by
__________.

Choice A
insufficient packing

Choice B
Choice C
Choice D
an oversized lantern excessive suction lift reversed pump
ring
rotation

insufficient speed

cavitation

increase the fuel
pump discharge
pressure

reduce the firing rate shift to a clean fuel
of the boilers
oil strainer

low draft air pressure using the same size
burner tips in all
burners
Improper boiler feed water deaeration operating with
fluctuating
could be directly linked to __________. excessive
deaerating feed tank
condensate
level as a result of
depression
taking on makeup
feed too rapidly

excessive discharge excessive net
pressure
positive suction head

using small sprayer
plates

secure the fuel oil
service pump

dirty sprayer plates

fluctuating
all of the above
condensate pressure
due to not
maintaining proper
hot well level

Improper fuel oil burner atomization can low draft air pressure using the same size high fuel oil
be generally attributed to __________.
burner tips in all
temperature
burners
Improper operation or faulty main steam speed
vibration
noise level
turbine components may be indicated
by an abnormal variation in _______.
Improper water washing of the watertube boiler firesides can cause
__________.
In a "D" type marine boiler, operating
under constant load, which of the
following conditions could cause the
superheated steam temperature to rise
above normal?

high fuel oil viscosity

All of the above are
individually correct

sulfuric acid
corrosion

decreased heat
transfer capabilities

erosion of tubes and loss of ductility in
drums
boiler tubes

High feed water
temperature

Insufficient
combustion air

Low feed water
temperature

77

Illustration

DFT excessive vapor
pressure

SP091813

ABS

VER

259005

1

250600

2

250600

4

259402

1

258501

2

250900

1

250061

254200

7

1

255302

1

254407

3

Steam Plants

Question
In a boiler automation system, if a
burner fuel oil solenoid valve continually
trips closed under normal steaming
conditions, you should __________.

Choice A
wedge the valve in
the open position
and report it to the
chief engineer

Choice B
bypass the solenoid
valve and enter the
fact in the logbook

Choice C
secure the burner
and determine the
cause of the valve
failure

In a boiler equipped with a convection
type superheater, the superheater tubes
are located __________.
In a boiler equipped with a convection
type superheater, the superheater tubes
are located __________.
In a boiler equipped with an automatic
feed water regulator, erratic variations
in the water level could be caused by
__________.
In a boiler furnace, incomplete
combustion due to insufficient air yields
an excess amount of __________.

in the path of the
radiant heat of
combustion
in a position
screened from the
furnace flame
high solids content
and foaming in the
drum

between the
downtake nipple and
circulator tube
in the direct path of
radiant heat flow

in a position
screened from the
furnace
in a separately fired
convection furnace

Choice D
wedge the valve in
the open position
and reduce the fuel
oil pressure at that
burner
between the
economizer and
generating tubes
on the fireside of the
screen tubes

ruptured feed water
control valve
diaphragm

low feed water
temperature

high feed water
temperature

carbon dioxide

carbon monoxide

nitrogen oxide

sulfur dioxide

In a boiler water gage glass, a ball
check valve is installed on the
__________.
In a boiler, water flows downward in
tubes furthest from the fires and flows
upward in tubes nearest the fires
because __________.
In a closed feed and condensate
system, to where do the main air ejector
after condenser drains directly drain?

top connection only

bottom connection
only

top and bottom
connection

drain valve

water is denser in
the tubes farthest
from the fires

water is less dense
in the tubes farthest
from the fires

tubes farthest from
the fires have a
greater diameter

tubes farthest from
the fires have a
smaller diameter

auxiliary condenser

loop seal

atmospheric drain
tank

deaerating feed tank

In a closed feed and water cycle, which Steam leaking from
of the conditions listed could prevent
the turbine glands.
vacuum from reaching the desired
level?

Marine growth on the Condensate
cooling water side of recirculating back to
the main condenser. the condenser during
maneuvering.

In a closed feed water system, the
greatest deaeration of condensate
occurs in the __________.

atmospheric drain
tank

DC heater

78

Illustration

Steam pressure to
air ejectors
maintained at 10
psig above designed
supply pressure.

air ejector condenser vent condenser

SP091813

ABS

VER

255302

2

262400

1

260205

1

260204

2

250101

9

267802

2

267805

1

267803

1

268401

267808

3

2

Steam Plants

Question
In a closed steam and water cycle,
which of the conditions listed could
prevent main condenser vacuum from
reaching the desired level?
In a cross-compound main propulsion
unit, the astern turbine is usually
installed at the __________.
In a cross-compounded turbine
operating at full load, the total available
steam energy is approximately divided
between the HP and LP turbine in the
ratio of __________.

Choice A
Excess steam
leaking from the
turbine glands.

Choice B
Abnormally low
atmospheric drain
tank level.

Choice C
Main condensate
recirculating valve
open during
maneuvering.
high pressure end of low pressure end of
the low pressure
the high pressure
turbine
turbine
2:1
3:1

Choice D
Dirty boiler
economizer tubes.

In a cross-compounded turbine
propulsion plant, steam enters the
__________.

high pressure,
intermediate and low
pressure units
simultaneously

high pressure unit
and then flows
through a crossover
to the low pressure
unit
Auxiliary exhaust
steam

high and low
pressure units
simultaneously

high pressure unit
and then cross-flows
to the condenser

In a DC heater, which source of steam
is commonly used to heat and deaerate
condensate?
In a disk type centrifugal purifier, the
bowl is mounted on the upper end of
the __________.
In a disk type centrifugal purifier, the
contaminated oil enters the centrifuge
__________.
In a disk type lube oil purifier, heavy
impurities collect mostly __________.

Root steam

Main steam

Auxiliary steam

worm wheel

radial thrust bearing

bowl spindle

friction clutch

at the bottom
through the oil inlet

at the top through
the regulating tube

through the neck of
the top disk

through the funnel
body

at the bottom of the
unit

along the center
shaft

at the water
discharge

on the inside
surfaces of the bowl

In a disk type lubricating oil centrifuge
__________.

the centrifuge driving all dirt and sludge
gears are lubricated are discharged with
by the reclaimed oil the cooling water
as it leaves the bowl

sealing water must
never be supplied
until after oil is fed to
the unit

deterioration of the
bowl ring gasket will
cause the purifier to
lose its water seal

A tubular bowl

A series of coneshaped plates

low pressure end of
the low pressure
turbine
1:1

In a disk-type purifier which component A discharge ring
is used to separate lube oil into thin
layers and create shallow settling
distances?

A three-wing device

79

Illustration

high pressure end of
the high pressure
turbine
4:1

SP091813

ABS

VER

260004

4

260004

2

260004

3

268901

1

250707

1

267206

268407

251307

251307

2

5

3

2

Steam Plants

Question
In a double articulated reduction gear
system, the component labeled "1"
would be identified as the _________?

Choice A
high speed pinion

In a double articulated reduction gear
system, the component labeled "2"
would be identified as the _________?

high speed pinion

Choice B
low speed pinion

Choice C
quill shaft

Illustration
SE-0005

low speed pinion

quill shaft

high speed gear
SE-0005

In a double articulated reduction gear
high speed pinion
system, the component labeled "3"
would be identified as the _______.
In a double reduction gear, the function bull gear
of a quill shaft is to provide flexibility
between the second reduction pinion
and the __________.

low speed gear

In a D-type boiler, which of the tubes
listed would be located in the generating
tube bank?
In a gravity lube oil system, a sight
glass is installed in a line near the
operating platform. This line connects
the __________.
In a gravity type lube oil service system,
if no lube oil appears in the sight glass
(bull's eye) of the return drop line while
underway, this is a positive indication
that __________.
In a huddling chamber safety valve, the
initial valve opening is caused by
__________.

Superheater support Downcomer tubes
tubes

In a huddling chamber type safety
valve, initial valve opening is caused by
static pressure acting on the
__________.

Choice D
high speed gear

Water walls

quill shaft

high speed gear
SE-0005

second reduction
gear

first reduction gear

first reduction pinion

Recirculating tubes

bottom of the gravity bottom of the gravity gravity tank overflow gravity tank overflow
tank and the lube oil tank and the sump
and the lube oil
and the sump
headers
headers
no oil is flowing to
the bearings

no oil is overflowing there is a failure of
from the gravity tank all lube oil pumps

static pressure acting steam pressure
on the compression acting on the
screw
increased surface
area of the
projecting feather
valve disk
nozzle ring

80

the gravity tanks are
empty

steam flow passing
through the
calibrated adjusting
ring

steam pressure
acting on the
exposed bottom area
of the valve disk

adjusting ring

compression screw

SP091813

ABS

VER

254203

2

256341

256341

259321

1

2

1

254109

1

254407

5

267203

258017

4

1

258017

2

261000

7

Steam Plants

Question
In a main propulsion steam turbine
installation, the condensate pump
initially discharges to the __________.

Choice A
Choice B
Choice C
air ejector condenser deaerating feed tank first stage heater

Choice D
distillate tank

In a marine boiler equipped with
mechanically atomized burner
assemblies, proper combustion
depends on the __________.
In a marine boiler equipped with
mechanically atomized burner
assemblies, proper combustion
depends on the __________.
In a marine boiler, maximum heat
transfer rates can be obtained by
__________.

design and
mechanical
construction of the
atomizers
fuel oil pressure

all of the above

speed of the forced centrifugal force
all of the above
draft fan and quantity imparted to the oil in
of excess air
the atomizer
speed of the forced temperature of the
draft fan and quantity fuel oil
of excess air

maintaining the
treating the boiler
recommended boiler water with oxygen
water pH
scavenging
chemicals
In a marine condenser designed with a recirculation of
steam lanes in the
reheating hot well, the hot well is
condensate
condenser
reheated by __________.

maintaining feed
water temperature of
212°F in the
economizer
a branch line from
the air ejector steam
supply

keeping the
watersides free from
scale deposits

In a modern high pressure steam plant, atmospheric drain
most feed water deaeration takes place tank
in the __________.
In a modern main propulsion turbine
bearing supply line
installations, lube oil system strainers
are usually located in the __________.

air ejector condenser DC heater

submerged heating
coils supplied with
auxiliary exhaust
steam
vent condenser

gravity tank overflow pump suction line
line

gravity tank
discharge line

In a multi-burner firebox, a burner tip
with a worn and enlarged orifice will
__________.

result in an uneven
flow of oil through
the burner

cause a high fuel oil
return line back
pressure

cause smokeless
and flameless
combustion

result in an uneven
heating of the
furnace

cause a high fuel oil
return line back
pressure

cause smokeless
and flameless
combustion

In a multi-burner firebox, a burner tip
with a worn and enlarged orifice will
__________.
In a multistage reaction turbine, the
dummy piston and cylinder function to
__________.

Illustration

have no effect on the
flow of oil if the
proper pressure is
maintained
have no effect on the
flow of oil if the
proper pressure is
maintained
counteract rotor axial
thrust

dynamically balance eliminate the
provide a means of
the rotating rotor
pressure drop across measuring axial
the blades
clearances

81

SP091813

ABS

VER

267601

1

250062

8

250062

3

257109

2

261009

3

261013

1

268901

3

250502

1

268802

1

251200

6

253501

3

259403

4

Steam Plants

Question
Choice A
In a pressure type main propulsion
gravity feed tank
turbine lubrication system, the lube oil
service pumps normally take suction
from the main sump and discharge
directly to the __________.
In a properly designed boiler, which end Evaporation
point is most likely to occur first?
In a properly designed boiler, which of Carryover
the end points should be reached first?

Choice B
lube oil coolers

Choice C
lube oil header

Choice D
main thrust bearing

Circulation

Combustion

Moisture carryover

Circulation

Evaporation

Combustion

In a propulsion boiler, diesel oil is
generally supplied to the burners when
__________.
In a reaction turbine, the axial thrust
due to the reactive force on the rotor
blading drives the rotor __________.
In a reaction turbine, the fixed blades
function to __________.
In a reduction gear train, a quill shaft of
high torsional flexibility provides
__________.

heavy smoking
persists

lighting off a cold
ship

toward the high
pressure end

toward the low
pressure end

decrease steam
velocity
self-adjustment of
the pinion gear shaft

a heavy fuel must be it is necessary to
blended
compensate for
overload capacity
against the dummy toward the
piston
diaphragm squealer
rings
prevent turbulence
produce turbulence

increase steam
velocity
rigidity between the efficient distribution
elements of the gear of oil to the various
train
elements of the gear
train
blowing tubes
crossing over forced
draft fans

In a regenerative air heater, air is
operating at low
bypassed around the heater while
steaming rates
__________.
In a segmental pivoted-shoe thrust
base ring
bearing, the thrust load among the
shoes is equalized by the __________.
In a single furnace boiler, where is the
steam typically cooled for use as
auxiliary steam?
In a single-element feed water
regulator, the amount of valve opening
and closing is controlled by the
__________.
In a steadily steaming boiler, carryover
is indicated by a/an __________.

equal distribution of
the load among the
various elements of
the gear train
giving a surface blow

oil wedge

leveling plates

thrust collar

Superheater

Desuperheater

Condenser

Air ejector

water level in the
drum

steam pressure in
the drum

steam flow from the
boiler

feed water flow to
the boiler

inability to maintain
boiler chemistry

sudden increase in
superheater outlet
temperature

sudden decrease in
superheater outlet
temperature

sudden decrease in
drum level

82

Illustration

SP091813

ABS

VER

256357

1

256361

1

250101

5

267200

2

268201

3

259411

2

253011

2

259411

1

267802

3

267803

3

267803

5

Steam Plants

Question
In a steam assist atomizer, the fuel
oil/steam mix takes place entirely within
the __________.
In a steam assist fuel oil atomizer, the
steam pressure is higher than the oil
pressure at __________.
In a steam propulsion plant, the primary
source of auxiliary exhaust steam is
from the __________.
In a steam turbine and reduction gear
main propulsion plant, the alarm sensor
for low turbine oil pressure is usually
installed __________.

Choice A
tangential slots

Choice B
mixing chamber

design boiler load

minimum boiler load high fuel viscosity

low fuel viscosity

main condenser

main feed pump

air heaters

at a point on the inlet
side of the main
bearings as close to
the bearings as
possible

at a point on the
at the outlet of the
outlet side of the
main thrust bearing
main bearings as
close to the bearings
as possible

at the end of the
supply line header to
the bearings

In a steam turbine propulsion plant, the
source of metal particles adhering to
the magnets in the lube oil strainer is
probably from the __________.
In a steaming boiler most dissolved
chlorides tend to concentrate at or near
the __________.
In a steaming boiler, higher than normal
stack gas temperature can be caused
by __________.
In a steaming boiler, most dissolved
chlorides tend to concentrate at, or
near, the __________.
In a tubular bowl centrifugal purifier,
lube oil is rotated at the same speed as
the bowl by the __________.
In a tubular-bowl type centrifugal lube
oil purifier, any solids separated from
the oil are __________.
In a tubular-bowl type centrifugal lube
oil purifier, any solids separated from
the oil are __________.

turbine shaft journal

turbine bearing shell reduction gears

bearing Babbitt
material

tube joints

feed pipe

water surface

low steam demand

tube joints

excessively high fuel too much excess air delayed burning due
oil temperature
to inadequate excess
air
mud drum
water surface
floor tubes

ring dam

bowl boss

discharged with the
water

removed through the retained in the bowl
waste drain

solidified on the
upper cover

discharged with the
water

removed during the
'shoot' cycle

solidified on the
upper cover

83

Choice C
whirling chamber

distilling plant

mud drum

three-wing device

retained in the bowl

Choice D
fuel oil swirlers

Illustration

flexible spindle

SP091813

ABS

250721

VER

Question
In a water tube boiler, circulation is
developed by the difference in the
__________.

I only

Choice A

Choice B
II only

Choice C
Both I and II

Choice D
Neither I nor II

I only

II only

Both I and II

Neither I nor II

area and length of
the water-tubes

densities within the
circulating water

heights of the boiler
drum

angle of inclination of
the tubes

generating tubes

downcomer tubes

screen tubes

floor tubes

sodium phosphate

calcium sulfate

magnesium
phosphate

sodium hydroxide

In accordance with Coast Guard
Regulations (46 CFR Part 56), all
vessels having oil fired boilers must be
equipped with __________.

one positivedisplacement type
fuel service pump

one fuel oil heater if all of the above
shown that the
normally used fuel oil
will be of low
viscosity

In accordance with Coast Guard
Regulations (46 CFR Part 62) for
vessels propelled by steam turbines,
the navigation bridge primary control
system must include safety limit
controls for ____________.
In accordance with Coast Guard
Regulations (46 CFR) all fuel oil service
piping in the vicinity of the burners must
__________.

high boiler water
levels

Suction and
discharge strainers
capable of being
cleaned without
interrupting the oil
supply
low boiler water
levels

utilize leak proof
gaskets in all joints

have all joints seal
welded

have wrap around
be provided with
deflectors on all
coamings or drip
bolted flanged joints pans

Illustration

4
I. tube length and various diameters
II. densities of the hot and cold water
In a water tube boiler, waterwall tubes
are effectively used to __________.

250411

6

250061

6

250703

6

259494

1

259775

259791

259783

2

1

1

Steam Plants

I. decrease the amount of refractory
material necessary in non-waterwall
installations
II. allow for significant increases in the
combustion rates
In a water-tube boiler, circulation is
caused by the difference in the
__________.
In a water-tube boiler, sludge is most
likely to collect in the __________.
In a water-tube boiler, waterside scale
formation is caused by __________.

84

low steam pressure

All of the above

SP091813

ABS

VER

259775

1

259733

259786

1

1

Question
Choice A
In accordance with Coast Guard
at least two fuel
Regulations (46 CFR), all vessels
service pumps
having oil fired main propulsion boiler(s)
must be equipped with __________.

Choice B
at least two fuel oil
heaters

Choice C
a suction and
discharge duplex
strainer

Choice D
all of the above

In accordance with Coast Guard
Regulations (46 CFR), the maximum
allowable working pressure of a watertube boiler must be stamped on the
__________.
In accordance with Coast Guard
Regulations (46 CFR), which of the
following materials may be used in short
lengths between the fuel oil boiler front
header manifold and the atomizer head
to provide flexibility?
In accordance with Coast Guard
Regulations (46 CFR), which of the
following statements is true concerning
safety valve construction and/or
operation used on propulsion boilers?

burner front

lower header

name plate

drum head

Copper tubing

Annealed copper
nickel

Nickel copper

All of the above

Not have threaded
inlets for valves
larger than 2".

Gagging a safety
valve by means of a
set screw through
the cap when gags
are unavailable is
acceptable only
when conducting a
hydrostatic test.
Burner cone

After the valve is set All of the above.
and adjusted, the
tolerance in popping
and reseating
pressures shall not
vary more than plus
or minus 1 1/2%.
Sprayer plate

Air cone

Burner cone

Sprayer plate

Air cone

259740

1

256330

1

In addition to a nozzle, a fuel oil
Ignition electrode
atomizer uses which of the listed parts?

256330

2

In addition to a orifice plate, a fuel oil
Ignition electrode
atomizer uses which of the listed parts?

258102

266900

1

1

Steam Plants

In addition to being hazardous to
cause overheating of impair the
personnel, gas leaks through the boiler the uptakes
effectiveness of the
casing can also __________.
air purge cycle

cause improper
impair the operation
atomization of fuel oil of the high steam
pressure limit switch

In addition to causing erosion of turbine thermal shock to the erratic governor
blades, slugs of water in the steam
bearings
operation
supply to a turbine driven pump can
result in __________.

loss of load with
overheating of the
resultant turbine over wearing rings
speed

85

Illustration

SP091813

ABS

VER

256808

4

261804

1

259243

2

256347

3

258808

256805

3

1

261227

1

258100

3

266404

2

Steam Plants

Question
Choice A
In addition to monitoring flame quality, regulate the air/fuel
flame scanners are used in combustion ratio controller for
control systems to __________.
more efficient
combustion
In addition to the direction of steam
The method in which
flow, which of the descriptions listed
the steam causes
may also be used to classify turbines? the turbine rotor to
rotate.
In addition to the repeated use of
calcium chromate,
surface blow to control boiler water
for oxygen control
chemistry, caustic soda may be used to
treat high salinity, as well as
__________.
In an air register assembly, the majority diffuser or impeller
of air passes through the __________.

Choice B
Choice C
secure the forced
automatically open
draft fans upon flame the fuel oil solenoid
failure
valves

Illustration
Choice D
secure the fuel
supply in the event of
a flame failure

The type of staging
and compounding of
steam pressures and
velocities.
phosphate, to aid in
scale prevention

The division of the
steam flow.

All of the above

calcium carbonate,
to assist in
precipitating solids

calcium sulfate to
reduce priming

atomizer assembly

stationary air foil or
blade cone

distance piece

In an automatically fired boiler,
increasing the temperature of the feed
water entering the steam drum will
ultimately result in a/an __________.

increase in the
quality of
superheated steam

increase in fuel
consumption

decrease in the
decrease in the
degree of superheat quality of steam
entering the
superheater

In an automatically fired boiler, the
steam pressure regulator controls the
supply of fuel oil to the burners by
responding to variations in the
__________.
In an impulse turbine, the fixed blades
function to __________.

steam drum water
level

steam header
pressure

master fuel oil
solenoid valve
position

decrease steam
velocity

change the direction equalize pressure
of steam flow
differences

In an oil fired water-tube boiler, inner
casing air leaks can cause
__________.
In any governor there is a small range
of speed in which no corrective action
occurs. This speed range is called the
governor dead band and is caused by
__________.

oxidation of the
exposed furnace
walls
friction in the
governor linkage and
control valve

chilling of the
combustion gases

prevent steam
turbulence

excessive feed water localized overheating
consumption
of tube surfaces

excessive sensitivity speed droop
in the governor
designed into the
control valve
governor system

86

burner flame
intensity

speeder spring surge
in the governor
servomotor system

SP091813

ABS

VER

256806

1

256817

1

261230

2

268614

1

268604

2

261015

7

256354

1

250715

250705

1

3

Steam Plants

Question
In automated boiler operations, a dirty
flame scanner will most likely result in
__________.
In automatic combustion control
systems, increasing or decreasing a
loading pressure by a set amount is
called __________.
In comparison to a reaction turbine, a
steam loss specific to an impulse
turbine is known as __________.
In herringbone helical gear sets, the
tooth contact loading __________.

Choice A
increased fuel oil
consumption

Choice B
securing fuel oil to
the burner

Choice C
loss of forced draft
air

Choice D
incomplete purge
cycle

biasing

loading

relaying

transmitting

radiation loss

leaving loss

blade and nozzle
loss

diaphragm packing
loss

is both a sliding and
rolling action
Aluminum-bronze

is distributed
between two
opposing helices
Aluminum

all of the above

In main propulsion systems, which
metal is used in the construction of the
shafts for a main reduction gear unit?

is distributed over
several teeth
simultaneously
Forged steel

In modern reaction turbines, thin tipping
is a procedure designed to
__________.
In most installations, the firing rate of a
boiler using steam atomization is
indicated by the __________.
In most marine boilers, the primary
reason the first few rows of generating
tubes, called screen or furnace row
tubes, are made larger in diameter than
the rest of the generating tubes is
because __________.

allow for axial
expansion

increase blade
strength and rigidity

reduce tip leakage

maintain radial
clearances

burner register
opening

fuel oil supply
pressure

fuel oil return
pressure

steam atomization
temperature

they require more
water flow since they
are exposed to the
greatest heat

they must screen the
superheater from the
direct radiant heat of
the burners

they must act as
downcomers to
ensure proper
circulation

their main function is
to retard combustion
gas flow for
maximum heat
transfer rates

In order for a maximum number of
boiler generating and circulating tubes
to be installed without weakening the
tube sheet, which of the listed
procedures should be carried out?

All rows of tubes
All rows of tubes
should be bent at the should be installed
same angle.
horizontal to the
drum.

87

Illustration

Cast steel

Different rows of
All tubes should be
tubes should be bent installed normal to
to enter the drum at the drum surfaces.
any convenient
angle.

SP091813

ABS

VER

267838

2

267212

267801

263600

261405

255204

1

1

2

1

5

Steam Plants

Question
Choice A
In order to maintain the effectiveness of have the centrifuge
the lube oil centrifuge to remove water, cleaned only once
the engineer in charge should
every 30 days
__________.
In order to maintain the required lube oil
temperature leaving a lube oil cooler,
where an automatic bypass valve is not
provided, which of the following
operations is correct?

Choice B
Choice C
Choice D
take lube oil samples maintain the lube oil insure that the oil
each week and place input temperature at input is always twice
in clear containers a maximum of 110°F the output capacity
for inspection

The cooling water to The quantity of lube
the lube oil cooler is oil to the cooler is
directly regulated to regulated.
maintain the proper
lube oil temperature.

In order to obtain the best performance never exceed the
be equal to the
with a lube oil purifier, the lube oil inlet highest main engine normal lube oil
temperature should __________.
bearing temperature cooler outlet
temperature
In order to operate the main engine with to secure only the
with a blank installed
only the high pressure turbine in
gland sealing steam in the high pressure
service, the unit should be arranged
to the low pressure turbine steam inlet
__________.
turbine
In order to reduce the oil clearance
between the collar and the astern thrust
element shown in the illustration, you
would __________.
In order to test the lifting pressure of the
deaerating feed heater relief valve, you
would __________.
I. close the auxiliary exhaust dump
valve to the main and auxiliary
condensers
II. increase the set point of the make-up
steam regulator to the auxiliary exhaust
system

The cooling water
The lube oil velocity
discharge leaving the from the cooler is
cooler is directly
regulated.
regulated.

be equal to main
lube oil sump
temperature

be maintained in a
temperature range of
160°F to a maximum
of 180°F
with the high
pressure turbine
exhausting directly to
the main condenser

increase the
thickness of the
adjusting ring

decrease the
thickness of the
adjusting ring

so that the astern
turbine is providing
approximately one
half the output
horsepower
increase the
decrease the
thickness of the filler thickness of the filler
piece
piece

I only

II only

Both I and II

88

Illustration

SE-0007

Neither I nor II

SP091813

ABS

VER

255204

6

255204

3

251555

3

262605

1

267212

267202

268701

3

1

5

Steam Plants

Question
Choice A
In order to test the lifting pressure of the I only
deaerating feed heater relief valve, you
would __________.

Choice B
II only

Choice C
Both I and II

Choice D
Neither I nor II

II only

Both I and II

Neither I nor II

increase the firing
rate
dry out the main
turbines

decrease the firing
rate
insure equal cooling
of the main turbine
bearings

increase the forced
draft speed
prevent excessive
condensate
depression

a thermostatically
controlled valve
which bypasses oil
around the cooler
lube oil pumps and
gravity tanks

the amount of latent
heat that the oil
carries away from
the bearings
gravity tanks and
main unit

the ambient sea
water temperature

decrease the forced
draft speed
remove the
excessive amount of
non-condensable
vapors which
accumulated during
maneuvering
operations
The operating speed
range of the
equipment

gravity tanks and
lube oil sump

lube oil sump and
lube oil pumps

They are of the
single casting type
bearing.

They are Babbittlined bearings.

They are selfaligning bearings.

They are spherical
seated bearings.

I. close the auxiliary exhaust dump
valves to the main and auxiliary
condenser
II. increase the set point of the
reduced steam pressure to the auxiliary
exhaust system
In order to test the lifting pressure of the I only
deaerating feed heater relief valve, you
would __________.
I. place a gag on the relief valve
II. increase the set point of the reduced
steam pressure to the auxiliary steam
system
In preparing to blow tubes at sea, you
should __________.
In securing the main turbines, steam to
the second stage air ejectors should be
left on for a short period of time in order
to __________.

In some lube oil systems, the
temperature of the lube oil downstream
from the lube oil cooler is directly
regulated by __________.
In steam turbine and reduction gear
units, lube oil coolers installed in the
lube oil system are located between the
__________.
In steam turbine main engine
installations, how are the main
reduction gear bearings identical to
other radial bearings?

89

Illustration

SP091813

ABS

VER

252402

1

250703

2

Question
In the absence of the manufacturer's
instructions, a good procedure in
reassembling a high pressure boiler
gage glass is to tighten the nuts in pairs
and __________.
In the boiler shown in the illustration, the
arrow "C" indicates a __________.

1

In the boiler shown in the illustration, the water wall tube
arrow "E" indicates a __________.

recirculating tube

250719

feed line

mud drum

1

In the boiler steam and water system,
steam stop
pressure is highest in the __________.

dry pipe

253700

In the condensate system, the
DC heater water
automatic recirculating valve can be
level
actuated by the __________.
In the diagrammatic arrangement of the F and J
thrust bearing, shown in the illustration,
the direction of shaft rotation and the
direction of thrust are indicated
respectively by arrows __________.

superheater steam
flow

condensate
temperature

condensate pump
discharge pressure

F and H

G and J

G and H

In the event of a failure of the
pneumatic control system, a multielement feed water regulator is
designed to operate as a __________.

constant-pressure
regulator

constant-volume
manually controlled thermo-hydraulic
feed water regulator feed water regulator feed water regulator

In the event of failure of the bellows "I"
shown in the illustration (SE-0019),
________.

piston "F" moves
upward to open the
exhaust valve and
close the makeup
steam valve.

piston "F" moves
upward to close the
exhaust valve and
open the makeup
steam valve

piston "F" moves
downward to close
the exhaust valve
and open the steam
makeup valve

piston 'F" moves
downward to open
the exhaust valve
and close the steam
makeup valve

manifold

pilot valve

pivot rods and block

254207

268809

253514

262011

262006

1

1

2

1

2

Steam Plants

Choice A
Choice B
begin with the center begin with the end
bolts and work
bolts and work
toward the ends
toward the center

Choice C
start at the top and
work down

Choice D
start at the bottom
and work up

downtake nipple

sliding foot

recirculating header

water wall header

Illustration

SG-0008

In the hydraulically operated turbine
bellows
gland seal regulator, illustrated, the
device used as the gland seal pressure
sensing unit is called a/an __________.

support tube

downcomer
SG-0008

SE-0012

SE-0019

SE-0019

90

SP091813

ABS

VER

268417

1

262006

262006

262006

265203

265203

1

4

3

3

2

256504

2

267814

1

259254

1

253402

3

Steam Plants

Question
In the illustrated device, what would be
a reason for oil being discharged from
port "N" ?
In the illustrated hydraulically operated
turbine gland seal regulator, the
exhaust dump valve is closed as a
result of the piston being actuated by
a/an___________.
In the illustration of a hydraulically
operated turbine gland seal regulator,
the gland seal pressure dump valve is
labeled ____.
In the illustration of a hydraulically
operated turbine gland seal regulator,
the gland seal pressure sensing line is
labeled ____.
In the illustration of a typical ship
service turbo generator control system,
the device that monitors turbine exhaust
pressure is labeled _______.

Choice A
The device being
operated as a
clarifier.
bellows at "I"

Choice B
Choice C
The ring dam size is This would be
too small.
normal for the
operation.
spring at "F"
vacuum at "G"

Choice D
The ring dam size is
too large.

In the illustration of a typical ship
service turbo generator control system,
the handle labeled "B" is used to
_______________.
In the majority of marine power plants,
the fuel oil heater installations are
divided into several units because
__________.

roll over the high
speed pinion

pump up the lube oil bypass the governor reset the over speed
manifold
control
trip

more heating is
required for lower
loads

auxiliary steam is
better utilized in this
system

In the operation of a lube oil clarifier, the
position of the oil-water interface should
be __________.
In the prevention of moisture carryover
from a marine boiler, one important
consideration is to __________.

maintained by the
ring dam

In the system illustrated the valves at
point "A" are __________.

swing check/ stop
valves

Illustration
GS-0124

pressure at "A"
SE-0019

E

C

G

A
SE-0019

G

C

D

A
SE-0019

K

J

M

F
SE-0009

properly treat the
boiler water with
hydrazine

plant operation can
be continued while
repairs are being
made to a defective
unit
nonexistent

oil leakage into the
condensate system
is less likely with
multiple system

maintained by the
number of disks in
the disk stack
control the amount of maintain a high
boiler water solids
boiler water level

maintained by the
diaphragm-type, weir
control valve
add foaming agents
to the boiler water

stop-check/ stop
valves

gauge valves/ drain
valves

globe valves/ gate
valves

91

SE-0009

SG-0005

SP091813

ABS

VER

268805

1

261226

261217

1

2

262002

2

250800

1

254111

3

250001

1

256307

2

261014

1

Steam Plants

Question
Choice A
In the thrust bearing assembly
increasing the
illustrated the total oil clearance can be thickness of the
correctly decreased by __________.
adjusting ring

Choice B
Choice C
increasing the
decreasing the
thickness of the filler thickness of the
piece
adjusting ring

Choice D
decreasing the
thickness of the filler
piece

In the turbine and gear set shown in the
illustration, when going astern, the
minimum tolerable clearance between
the rotor and intermediate or guide
blading is __________.
In what classification of steam turbines
are the moving blades and the adjacent
fixed rows of blades shaped to act as
nozzles?
In what positions will the air-operated
regulating valves, shown in the
illustration, be in when the steam in the
gland seal supply line is excessive?

.070 inch

.150 inch

.025 inch

.090 inch

Illustration
SE-0007

SE-0016

Impulse

Radial flow

Reaction

Helical flow

Both valves are
open.

Both valves are
closed.

The excess steam
unloading valve is
open and the supply
pressure control
valve is shut.

The excess steam
unloading valve is
shut and the supply
pressure control
valve is open.

In what section of a boiler would you
Superheater outlet
find a steam quality of 90%?
In which of the following types of
Jet
condensers would you find the cooling
water passing through tubes with the
turbo generator exhaust steam directed
around the outside of the tubes?

Desuperheater outlet Steam drum
Barometric

Surface

Last pass of the
superheater
Collins

In which of the listed components is
Furnace
chemical energy converted to thermal
energy with regards to boiler operation?

Superheater

Steam drum

Economizer

In which order should the chemical test CO2, O2, CO
analysis of boiler flue gas samples be
made?
In which type of turbine does a pressure Impulse
drop exist through the fixed blades and
the moving blades?

CO, CO2, O2

O2, CO, CO2

CO, O2, CO2

Reaction

Rateau

Curtis

92

SE-0020

SP091813

ABS

VER

261234

1

258203

251310

1

4

Question
Choice A
In which type of turbine does the steam Helical flow turbine
pass through reversing chambers
machined on the inner surface of the
casing, causing the steam to be
redirected back to the turbine wheel
rim?
Increasing the amount of excess air to a decrease
boiler equipped with an uncontrolled
interdeck superheater will cause the
steam temperature at the superheater
outlet to __________.

Choice B
Axial flow turbine

Choice C
Combination axial
and radial flow
turbine

Choice D
Cross compound
flow turbine

increase

decrease
momentarily

increase
momentarily

Increasing the blow down of a boiler
increasing the valve
nozzle reaction safety valve is normally spring compression
accomplished by __________.

decreasing the valve raising the adjusting lowering the
spring compression ring
adjusting ring

Increasing the temperature of the feed
water entering the steam drum will
ultimately result in a/an __________.

increase in stack gas increase in fuel
temperature
consumption

operating at reduced carrying the brine
vacuum conditions
level below normal

decrease in the
decrease in the
degree of superheat quality of steam
entering the
superheater
leaks in the demister reduced feed water
baffles
heater temperatures

white incandescent
flame

high flame
temperature

black stack smoke
emission

0% carbon monoxide
level

258808

2

269928

1

258503

1

Indicated high salinity of the distillate
discharged from a flash-type distilling
plant will be a result of __________.
Insufficient air for combustion in a boiler
furnace could result in a __________.

2

high stack
temperature

high superheater
temperature

sputtering fires

258500

Insufficient combustion air supply to a low superheater
boiler furnace can cause __________. temperature

258500

1

Insufficient combustion air supply to the the fires to sputter
furnace would cause __________.

low superheater
outlet temperature

high stack
temperature

high feed water
consumption

pointed flame

1

Insufficient combustion air supply will
cause an atomizer flame to appear as a
__________.
Insufficient cooling water circulation
through air ejector intercondensers and
after condensers will cause
__________.

ragged flame

258502

dull red flame with
black streaks

light yellow flame
with white streaks

decreased vacuum
in the main
condenser

overheating of the air flooding of the after
ejector nozzles
condenser

255005

2

Steam Plants

93

Illustration

flooding of the loop
seal

SP091813

ABS

VER

267839

1

268705

1

260603

2

260604

1

261202

252812

3

3

261016

1

250303

5

250303

1

Steam Plants

Choice C
assist in breaking
down surface tension
and thereby increase
separation of solids
and liquids from the
oil
Journal bearings used with modern
permit removal of the facilitate
maintain axial
turbine rotors are manufactured in two bearing without
interchanging with
alignment and
halves in order to __________.
removing the rotor
other bearing halves reduce thrust
from the turbine
Labyrinth packing rings are installed on interstage steam
air leakage from
pressure buildup on
turbine diaphragms to minimize
leakage along the
entering the turbine both sides of the
__________.
turbine rotor
casing
diaphragm
Labyrinth seals used to reduce leakage spring bound carbon braided asbestos
staged rubber
around a turbine shaft are constructed segments
covered core
composition seal
of __________.
segments
stripping
Large temperature and pressure drops a nozzle diaphragm a single row of
a dummy piston and
which occur in the first stage of a
in the low pressure blades more than
cylinder to offset
combination impulse and reaction
end of the turbine
once
axial thrust
turbine are caused by steam passing
through __________.

Illustration
Choice D
establish the position
of the three wing
within the bowl
GS-0124

Leakage into an internal desuperheater steam scrubbers
may be caused by __________.
carrying away

Question
Item "Q" in the illustration is used to
__________.

Choice A
Choice B
guide the oil to be
balance the force
cleaned along the
distribution of the
inside of the bowl for three wing device
discharge

Leakage over the ends of the blade tips, thin tipping
as a result of the pressure differential
between each row of blades in a
reaction turbine, can be reduced with a
blade design known as ________.
Longitudinal expansion of a boiler water tube sheet
drum is allowed for at the boiler
__________.
Longitudinal expansion of a boiler water tubes
drum is permitted by the __________.

provide for positive
oil flow at all loads

steam from escaping
to the atmosphere
machined metallic
packing strips or fins
one or more velocitycompounded
impulse stages at the
high pressure end of
the turbine

external corrosion
penetrating the
desuperheater tube
walls
end-tightening

chemical feed pipe
leaking

excess lifting of
safety valves

seal stripping

Any of the above

casing joints

foundation sliding
feet

refractory expansion
joint

casing

foundation

refractory

94

SP091813

ABS

VER

262000

3

253010

2

253010

1

258300

5

258218

2

258300

1

268000

267201

1

5

267801

3

267212

2

Steam Plants

Question
Low pressure steam is used to keep air
from leaking into turbine casing along
the turbine shaft. For this purpose,
which of the following steam systems is
used?
Low stack gas temperature should be
avoided to reduce __________.
Low stack gas temperatures due to light
boiler loads should be avoided in order
to reduce the __________.
Low steam pressure in a steaming
boiler can be caused by __________.
Lower boiler efficiency results from
carrying too much excess air because
__________.

Choice A
Direct admission of
35 psi (241.3 kPa)
auxiliary steam

Choice B
Superheated steam
system

Illustration
Choice C
Choice D
Gland leak off steam Gland sealing steam
system
system

economizer thermal
stress
percentage of carbon
monoxide in the
stack gas
low steam demand

sulfuric acid
formation
formation of dew
point sulfuric acid

back pressure in the air heater thermal
uptakes
stress
heat loss through the accumulation of soot
uptakes
low water level

large sprayer plates

it decreases the
volatility of the fuel

the flame
temperatures are
lower

Lower than normal steam pressure in
an operating boiler may be caused by
__________.
Lube oil cannot be efficiently filtered if
its __________.

high feed water
temperature
it increases the
volume and
temperature of the
furnace gas leaving
the stack
high feed water
temperature

a sudden drop in
superheater outlet
temperature
viscosity index is too temperature is too
low
low

a low water level in
the steam drum

boiler water
contamination
pump capacity is
greater than the
system's needs

Lube oil coolers are necessary in most
engine lubricating systems because
__________.

when engine oil is
used continuously,
the coolers prevent
the oil from wearing
out

harmful acids need
to be condensed
before being
removed by a
centrifuge

Lube oil is preheated before
centrifuging in order to __________.

boil off water

prevent corrosion

pump discharge
pressure is higher
than the system
pressure
they maintain the oils
viscosity and film
strength while
removing the
residual heat of the
bearings
reduce friction of the
rotating components
of the centrifuge
lube oil return flow
valve

lube oil outlet valve

it varies the degree
of deposits on heat
absorbing surfaces

Lube oil temperature leaving the lube oil cooling water inlet
coolers is regulated by throttling the
valve
__________.

cooling water outlet
valve

95

cooling decreases
viscosity and
improves engine
thermal efficiency

improve purification

SP091813

ABS

VER

250011

2

267221

267221

267221

3

2

Question
Choice A
Choice B
Machinery operating features are
Reduction of friction. Insulation of hot
designed to help conserve energy.
surfaces.
Which of the following will not contribute
to a system's thermal efficiency?

Choice C
Lubrication of
moving parts.

Choice D
Elevation of heat
sink temperatures.

Magnets are installed in the main
propulsion turbine lube oil pump
strainers to attract metal particles
released through wearing of
__________.
Magnets are installed in the main
propulsion turbine lube oil strainers to
attract metal particles released through
wearing of the __________.
Magnets located in lube oil strainers
serve to __________.

1

254207

2

254409

4

turbine blades

reduction gears

all of the above

reduction gears

turbine blades

Babbitt bearings

turbine labyrinth

remove all metallic
particles from the
lube oil

remove ferrous
metallic particles
from the lube oil

remove nonferrous
metallic particles
from the lube oil

hold the strainer
cover in place when
removing or installing
the cover bolts

balance and control
condensate
temperatures at full
load
main condenser

provide adequate
cooling water for the
air ejector
condensers
bilge

vent accumulated
vapors from the
condensate pump
discharge
atmospheric drain
tank

decrease reduction
gear radial bearing
loads
balance axial thrust decrease reduction
and reduce vibration gear radial bearing
loads
Babbitt
steel

increase tooth
deflection at high
speeds
increase tooth
deflection at high
speeds
cast-iron

decrease the
number of teeth in
contact
decrease the
number of teeth in
contact
ferrous oxide

floating strainers

centrifugal strainers

cestus strainers

Main condensate recirculating systems prevent excessive
are primarily intended to __________. overheating of the
condensate pumps

268613

2

Main propulsion steam turbine casing
drains generally discharge to the
________.
Main reduction and pinion gears are
double helically cut to __________.

268613

5

Main reduction and pinion gears are
double helically cut to __________.

268701

3

267203

3

Steam Plants

turbine labyrinth

Main steam turbine bearings are lined
with __________.
Main steam turbine lubricating oil
systems are fitted with __________.

contaminated drain
tank
reduce end thrust
and noise

magnetic strainers

96

Illustration

SP091813

ABS

VER

254113

5

254100

1

257109

1

252201

259004

1

1

256520

4

264602

2

265003

265003

2

1

Steam Plants

Question
Maintaining low pressure in a
condensing turbine exhaust trunk
__________.

Choice A
enables better
utilization of available
heat energy to
perform work

Choice B
eliminates creep
problems in the
exhaust trunk during
maneuvering

Choice C
reduces condensate
depression with low
seawater
temperature

Choice D
prevents steam
turbulence in the
exhaust trunk due to
steam laning

Makeup feed water is brought into an
operating closed feed system via the
__________.
Many steam plants are designed so that
diesel oil can be provided to the burners
when __________.
Maximum heat transfer rates in a
marine boiler can be obtained by
__________.

main feed pump

auxiliary feed pump

feed booster pump

condenser vacuum
drag line

heavy smoking
persists

lighting off a cold
ship

a heavy fuel must be overload capacity is
blended
required

Modern day boiler automation allows
bypassing the "flame safeguard" system
to permit a burner to have a "trial for
ignition" period during burner light-off.
This period may not exceed ______.
Modern fuel oil temperature control
devices are regulated to obtain a
desired viscosity rather than a specific
fuel oil temperature because
__________.

maintaining the
treating the boiler
recommended boiler water with oxygen
water pH
scavenging
chemicals
5 seconds
10 seconds

residual fuel oils
have the same
viscosity
characteristics
regardless of where
they are refined
Moisture erosion in the last stages of
low inlet steam
the low pressure turbine will result from superheat
__________.
temperature
Most auxiliary turbine feed pumps do
operate at relatively
not require an external source of gland low pressures
sealing steam because they
__________.
Most auxiliary turbines do not require an operate at relatively
external source of gland sealing steam low pressures
because they __________.

maintaining the feed keeping the
water temperature of watersides free from
212°F
scale deposits
15 seconds

30 seconds

the temperature of
the fuel oil varies
with the flow rate
through the heater

the relationship
between temperature
and viscosity varies
with different fuels

viscosity regulation
eliminates the need
for close control of
the fuel/air ratio

an open LP bleed
steam valve

an open gland
exhaust valve

All of the above are
correct

exhaust to pressures utilize carbon
above atmospheric packing rings at the
pressure
low pressure end

operate with only a
small amount of axial
thrust

exhaust to pressures utilize carbon
above atmospheric packing rings at the
pressure
low pressure end

operate with only a
small amount of axial
thrust

97

Illustration

SP091813

ABS

VER

268801

2

268613

6

250007

1

250061

3

250405

268407

1

2

268407

4

250201

1

259122

261206

1

1

Steam Plants

Question
Most main propulsion reduction gear
bearings are __________.

Choice A
self-lubricating,
sealed, roller ball
type
Most main reduction gear units employ eliminate the need
double helical cut gears, rather than
for a turbine dummy
single helical cut gears, because double piston
helical cut gears __________.

Choice B
rigidly mounted,
Babbitt lined, split
type
eliminate the need
for spherically seated
bearings

Choice C
spherical-seated,
tapered roller type

Choice D
self-aligning, solid
bushings

prevent unequal
tooth contact

operate without
significant axial
thrust

Most marine main boilers are designed
to produce __________.
Natural circulation in a marine boiler is a
result of __________.

saturated and
superheated steam
the fact that the
specific weight of
steam is greater than
water
reinforcing castable
and plastic refractory

saturated steam only superheated and
supercritical steam
the velocity imparted the turbulence of
to the feed water by high pressure feed
the feed pump
water entering the
steam drum
anchoring castable anchoring castable
refractory only
and plastic refractory

No lube oil appearing in the sight glass no oil flowing to the
(bull's eye) of a gravity type system is a bearings
positive indication of __________.

no oil is overflowing
the gravity tank

failure of all lube oil
pumps

No lube oil appearing in the sight glass no oil flowing to the
(bull's eye) of a gravity type system is a bearings
positive indication of __________.

no oil overflowing in
the gravity tank

oil drop line is closed the gravity tanks
being empty

Noise caused by condensate striking
bends or fittings in a steam pipe line is
called __________.
Normally a boiler water sample should
be taken __________.

condensate
depression

water hammer

piston slap

after the boiler has
been blown down

before the boiler has when the boiler has
been blown down or been refilled with
chemicals added
makeup

from the highest
point in the feed
system

support shrouding

eliminate blade and
nozzle losses

Nichrome wire is used when patching
boiler furnaces for __________.

superheated steam
only
the difference in the
densities of the fluid
in the downcomer
and riser circuits
anchoring plastic
refractory only

Nozzle diaphragms are installed in
support moving
pressure-compounded impulse turbines blades
to __________.

98

hold the nozzles of
the stage and admit
steam to moving
blades

Illustration

the gravity tanks
being empty

hydraulic lock

SP091813

ABS

VER

268415

3

259407

2

268416

2

267226

1

250250

3

252826

1

267222

1

258801

251318

1

1

Steam Plants

Question
Choice A
Of the many impurities commonly found Water
in marine lubricating oil, which of the
following CANNOT be removed by a
centrifugal purifier at normal operating
speeds and temperatures?
Oil accumulation in boiler water would cause foaming and
__________.
carryover from the
boiler
Oil discharged from the illustrated
proper operation of
device has a milky-white appearance
the centrifuge
which is due to __________.
Oil flowing through the sight glass in the gravity tank is
line between the lube oil gravity tank
overflowing
and main sump indicates the
__________.
Oil in the contaminated drain inspection a defective relief
tank results from __________.
valve on the fuel oil
heater

Choice B
Carbon particles

Choice C
Diesel fuel oil

Choice D
Metal particles

increase the heat
transfer rate

prevent acid attack
on the boiler tubes

insufficient tension
being maintained by
"H"
lube oil pump is
stopped

excessive tension
provided by "Q"

practically eliminate
boiler sludge
formation
slightly worn item "V"

Oil or scale deposits on boiler tube
walls will cause __________.
Oil supply pressure to the main lube oil
header of a gravity feed lube oil system
is __________.

decreased boiler
steam pressure
the sum of the lube
oil static head
pressure and service
pump discharge
pressure

increased boiler
steam pressure
the difference
between the lube oil
static head pressure
and service pump
discharge pressure

an explosion in the
boiler
equal to the service
pump discharge
pressure, since the
static heads of the
lines to and from the
gravity tank cancel
out one another

decrease

rise momentarily
then decrease

remain constant

Superheater safety
valve

Pilot actuated safety Pilot actuated safety
valve for the
valve for the drum
superheater safety
safety valve
valve

those tubes to
overheat
the result of the
height of the gravity
tank above the
manifold

On a boiler equipped with an
rise
uncontrolled interdeck superheater,
reducing the feed water temperature to
the steam drum will cause the
superheater outlet temperature to
__________.
On a boiler equipped with pilot actuated Drum safety valve
safety valves, which of the valves listed
will be actuated first?

lube oil suction
strainer is clogged

Illustration

GS-0124
lube oil sump is full

improper drainage of a leaking heating coil operating the fuel oil
the fuel oil heater
in a fuel oil settling
heater at excessive
coils
tank
temperatures

99

SP091813

ABS

VER

251304

1

263300

268101

269916

256705

266902

251327

268903

1

1

1

1

2

2

1

Steam Plants

Question
On a boiler safety valve, the blow down
adjusting ring is locked in place by a
__________.
On a main propulsion turbine bearing,
the readings obtained with a bridge
gage represent the __________.
On a ship equipped with a gravity type
lube oil system, which of the conditions
listed will occur FIRST if the main lube
oil pump discharge pressure is lost?

Choice A
set screw

Choice B
locknut

Choice C
wire seal

Choice D
cotter pin

oil clearance and
bearing wear

Babbitt thickness

diaphragm tip
clearance

blade axial clearance

On a steam vessel, if a centrifugal main
feed pump were operating at shutoff
head with the recirculating line closed,
which of the following conditions could
occur?
On an automatically fired boiler, the loss
of forced draft fan will result in which of
the listed actions to be carried out?

Water level in the
DC heater would
decrease.

On an fully automated vessel steaming
at sea speed, which of the following
engine room responses will
automatically be actuated when the
bridge throttle control is changed from
full ahead to slow ahead?
On an operating boiler, the superheater
safety valve shown in the illustration is
set to lift at 670 psi and reseat at 630
psi. To increase the lifting pressure to
700 psi, but maintain the previous
reseat pressure, you would turn the
compression screw __________.

Main turbine
Scoop injection valve Main condensate
extraction valves will will open.
recirculating valve
open.
will open.

First-stage feed
water heater will be
bypassed.

in the clockwise
direction only

counterclockwise
direction and raise
the adjusting ring

On main turbine propulsion units, gear
type flexible couplings are generally
used between the __________.

rotor shaft and pinion rotor shaft and quill
shaft
shaft

All bearing oil
An alarm will sound. The astern throttle
pressure will be lost.
will immediately
open.

An increased water
level in the steam
drum.

Stopping of the feed Stopping of the fuel
pump
oil service pump

in the
counterclockwise
direction only

Flashing at the
suction side of the
pump.

Illustration

Lube oil will be
provided to the
bearings and gears
via the gravity tank
overflow line.
Excessive
diaphragm seal wear
in the feed water
regulator.

Closing of the
All of the above.
master fuel oil cutoff

clockwise direction
and lower adjusting
ring

SG-0018

100

quill shaft and high
speed pinion

second reduction
and the shaft thrust
bearing

SP091813

ABS

VER

269920

2

251319

Question
On watch aboard ship, which of the
following conditions will prevent a
general service shipboard pump from
achieving its maximum suction lift?

Choice A
Leaks developed in
the suction piping.

Choice B
Restriction in the
suction line.

Once a huddling chamber type safety
valve has begun to initially open, it will
then pop open due to the
__________.

I only

II only

Choice C
Choice D
Gases or vapors
All of the above.
released in the liquid
as a result of greater
than normal
pressure drops.
Both I and II
Neither I nor II

Illustration

2
I. expansion of the steam leaving the
nozzle
II. forces exerted on the projecting lips

250700

2

252802

1

268103

3

252900

1

251203

8

250502

3

Steam Plants

One advantage of installing water wall
tubes in a boiler furnace is to
__________.
One boiler of a two boiler plant has
ruptured a tube and the water cannot be
maintained in sight in the gage glass.
After securing the fires, your next action
should be to __________.
One cause for unusually low lube oil
service pump pressure may be due to
_________.
One factor for determining the minimum
feed water inlet temperature to a boiler
economizer is the __________.

increase furnace size reduce furnace
temperature

decrease refractory
maintenance

reduce combustion
rates

secure the forced
draft fans

stop the fuel oil
service pump

secure the feed
water supply to the
boiler

close the main
steam stop

low sea water
temperature

excessively high lube wasted lube oil
oil temperature
cooler zincs

all of the above

dew point
temperature of the
stack gases

superheater inlet
temperature

desuperheater outlet
temperature

One function of a steam drum
desuperheater installed in a high
pressure boiler would be to
__________.
One function of the air and flue gas
bypass dampers installed in
regenerative type air heaters is to
__________.

maintain the
raise the boiler water lower the
essential flow of feed temperature in the
temperature of the
water into the drum steam drum
steam entering the
superheater
avoid excessive
regulate combustion reduce the load on
cooling of the stack air temperature at
the element drive
gases during low
normal firing rates
motor
load operation

101

temperature of
steam bled off the
LP turbine

lower the
temperature of the
steam in the steam
drum
reduce the
temperature of the
double undulated
heating elements

SP091813

ABS

VER

250703

3

251200

2

267808

1

251000

2

268001

1

261402

2

254117

2

Steam Plants

Question
Choice A
Choice B
One function of the component labeled act as a foundation provide a collecting
"C" shown in the illustration is to
beam to support the area for sediment
__________.
weight of the boiler and sludge

Choice C
cool the refractory

Choice D
form a soot seal in
the lower corner of
the boiler casing

One function of the desuperheater
installed in a boiler steam drum is to
__________.

raise the
distribute feed water provide steam for
temperature of the
within the boiler
auxiliary machinery
steam in the dry pipe

One function of the disks, in a disk-type
centrifugal purifier, is to divide the bowl
space into many separate passages to
__________.
One function of the internal fitting
labeled "C" shown in the illustration is
to __________.
One limiting problem of lube oil filters
restricting their use in large lube oil
systems is __________.

minimize agitation of increase hydraulic
the oil-water mixture head needed for
proper circulation

completely filter out prevent bowl spindle
suspended particles vibration

reduce high water
level in an
emergency
they easily rupture at
normal working
pressures

remove scum from
the water surface

One method of securing shroud bands
to the ends of the turbine blades is to
__________.
One of the basic rules applying to the
operation of a single-pass main
condenser is that the __________.

pass generated
steam to the
superheater
as the oil
temperature
fluctuates during
load changes their
effectiveness
changes inversely to
the temperature
stiffen the blades to increase blade
reduce vibration
resistance to
moisture in steam
cooling water
vacuum must be
overboard should be maintained at 29.92"
about 10°F higher
of Hg. under all
than the inlet
operating conditions
temperature

102

Illustration
SG-0008

add moisture to
superheated steam

distribute feed water
throughout the drum

SG-0011

the associated large the need to
pressure drop across centrifuge the oil in
the filter
addition to the use of
the filter

assist in maintaining strengthen the blade
radial clearances
root fastenings
quantity of reheating
steam flow through
the condenser must
be maintained at
maximum under all
operating conditions

condensate
temperature must
never be allowed to
drop below 104°F

SP091813

ABS

VER

251203

7

251319

1

267801

4

253504

5

259322

2

251200

8

262407

1

Steam Plants

Question
One of the functions of a boiler
desuperheater installed in a high
pressure boiler is to __________.

Choice B
II only

Choice C
Both I and II

Choice D
Neither I nor II

protect the
desuperheater from
overheating
increase the
pressure at which
the oil is fed through
the purifier

protect the
superheater from
overheating
match the discharge
ring size outside
diameter with the
lube oil's specific
gravity

One of the operating conditions sensed feed water flow
by a two-element feed water regulator is
__________.
One of the purposes of chemically
reduce blow down
treating boiler water is to __________. frequency

steam flow

fuel pressure

maintain a constant
steam flow in the
auxiliary steam line
use the smallest
inside diameter of
the discharge ring
size without a loss of
oil with the discharge
water
steam pressure

reduce scale
formation

eliminate waterside
cleaning

constantly decrease
alkalinity

One purpose of a desuperheater
installed in a boiler steam drum is to
__________.
Operating a steam turbine propulsion
unit at medium speed, in an area with
extremely cold seawater and the main
circulating pump providing full cooling
water flow to the condenser will result in
__________.

increase the boiler
efficiency

add moisture to
superheated steam

increased plant
efficiency due to
increased
condensate
depression

increased
effectiveness of the
air ejectors due to
the increased main
condenser vacuum

remove all superheat
from generated
steam
increased
condensate aeration
due to the inability of
the air ejectors to
remove excessive air
accumulation from
the condenser

I. maintain the essential flow of feed
water into the drum
II. heat the boiler water in the steam
drum
One of the important functions of the
superheater safety valves is to
__________.
One of the most effective methods of
improving purification in tubular and
disk type centrifugal purifiers is to
__________.

Choice A
I only

maintain a constant
steam flow in the
desuperheater
decrease the
viscosity of the oil by
heating

protect the
superheater from
overheating
excellent plant
efficiency due to
higher attainable
vacuum

103

Illustration

SP091813

ABS

VER

262407

4

262407

5

250062

1

265000

1

258600

6

Question
Operating a steam turbine propulsion
unit at medium speed, in an area with
extremely cold seawater, and the main
circulating pump providing full cooling
water flow to the condenser will result in
__________.
Operating a steam turbine propulsion
unit at reduced speed, in an area with
extremely cold seawater, with the main
circulating pump providing full cooling
water flow to the condenser will result in
__________.
Overheating of the generating tubes will
occur when a boiler reaches its end
point of __________.
Packing rings installed on auxiliary
turbines are generally lubricated by
__________.
Panting in an oil fired marine boiler can
be caused by __________.

258600

5

Panting or rumbling in a boiler furnace
is usually caused by __________.

259031

2

259031

259243

258014

1

4

1

Steam Plants

Choice A
decreased plant
efficiency due to
higher attainable
vacuum

Choice B
increased plant
efficiency due to
increased
condensate
recirculation

decreased plant
efficiency due to
higher attainable
vacuum

decreased plant
efficiency due to
increased
condensate
depression

Choice D
increased
effectiveness of the
air ejectors due to
the increased main
condensate
temperature
a decreased
increased plant
requirement for
efficiency due to
gland sealing steam increased
condensate
depression

evaporation

circulation

combustion

moisture carryover

separate lube oil
lines

a water leak off line

moisture in the
turbine steam

a salt water service
line

excessive
combustion air
supply
too much air

low fuel oil
temperature

fouled burner
sprayer plates

Phenolphthalein indicator is used in the dissolved oxygen
boiler water test for __________.
Phenolphthalein is used as an indicator hardness
to test boiler water for __________.
Phosphates are used in the chemical
treatment of boiler water to
__________.
Poor atomization accompanied by an
elongated flame from a steam
atomization burner is MOST likely
caused by __________.

Choice C
reduced plant
efficiency due to
excessive
condensate
depression

not enough air

insufficient
combustion air
supply
low fuel temperature low fuel pressure

alkalinity

chloride content

hardness

alkalinity

hydrazine

chloride content

neutralize the
harmful effects of
hydrogen
embrittlement
the forced draft fan
too slow for the
boiler load

decrease dissolved
oxygen content

control alkalinity and convert scale
neutralize vanadium forming salts to
relatively harmless
sludges
the fuel oil
improper operation
temperature being
of traps in atomizing
too low
steam return piping

104

Illustration

an improper cetane
number

SP091813

ABS

VER

265002

1

257107

1

269935

1

269708

269708

269708

269708

269708

269708

7

1

2

3

11

5

Steam Plants

Question
Precautions to be observed prior to
starting a turbine driven cargo pump,
should include __________.

Illustration
Choice A
Choice B
Choice C
Choice D
assuring that the
observing the
open all governor oil checking the manual
turbine casing drains operation of the over relay drains
trip device for proper
are wired closed
speed trip
operation

Prior to lighting a burner in a cold boiler,
you should __________.
Prior to relieving the watch at sea, you
notice black smoke coming from the
stack. What would this indicate?
Prior to relieving the watch you should
first check the fire room status by
verifying the boiler water level and
___________.
Prior to relieving the watch you should
first check the fire room status by
verifying the boiler steam drum level
and _________.
Prior to relieving the watch you should
first check the fire room status by
verifying the boiler steam drum level
and _________.
Prior to relieving the watch you should
first check the fire room status by
verifying the boiler water level and
__________.
Prior to relieving the watch you should
first check the fire room status by
verifying the fuel oil pressure to the
boilers and _____________.

close the
superheater vent
Insufficient excess
air

blow down the mud
drum
Dirty burner

open the surface
thoroughly purge the
blow valve
furnace
Soot blowers need to All of the above
be operated

prepare to blow
tubes

economizer inlet
temperature

boiler steam
pressure

port and starboard
settling tanks

lube oil temperature fuel pressure to the
burners

water drum level

inspecting the fires
and burners

preparing to blow
tubes

stack temperature

steam atomization
temperature to the
mechanical
atomizers
port and starboard
settling tank levels

steam atomization
pressure to the
mechanical
atomizers
boiler steam
pressure

fuel pressure to the
burners

fuel oil viscosity

water drum level

make up feed tank
level

prepare to blow
tubes

port and starboard
settling tanks

Prior to relieving the watch you should
first check the fire room status by
verifying the fuel oil pressure to the
burners and _____________.

DC heater
temperature

prepare to blow
tubes

check port and
starboard settling
tanks

boiler water level

105

SP091813

ABS

VER

263010

1

Question
Prior to rolling the main turbines in
preparation for getting underway, you
should __________.

262404

4

Prolonged astern operation of a turbine overheating of the
will cause __________.
stern gland

251316

1

Choice A
secure the gland
sealing steam
regulator

253500

1

259261

1

Proper bracing and support of the boiler
safety valve escape piping is necessary
to __________.
Proper lagging of a single-element feed
water regulator is accomplished by
applying the insulation material
__________.
Proper use of the boiler surface blow
will __________.

262404

5

Proper vacuum must be maintained
during prolonged astern operation to
__________.

eliminate leaving
loss in the ahead
blading

254113

1

Proper vacuum must be maintained in
the main condenser to __________.

run auxiliary
machinery

258600

3

256402

1

252706

1

Steam Plants

Choice B
open the reduction
gear casing access
plates and inspect
the lube oil spray
pattern
overheating of the
ahead stages

Choice C
circulate the lube oil
through the
emergency lube oil
cooler

Choice D
disengage the
turning gear

allow for back
pressure formation in
the line
to both connections,
including finned
areas

prevent scale from
lodging on the valve
seat
only as necessary to
prevent possible
injury
have no effect on
boiler alkalinity

improper functioning loss of suction at the
of the air ejectors
condensate pump

prevent condensate
from accumulating in
lines
to the steam
connection, but not
water connection

prevent stressing of
the safety valves

remove most
precipitated solids

remove floating
impurities from boiler
water
minimize any
appreciable amount
of condensate
depression

disrupt circulation in
a steaming boiler

maintain plant
efficiency

utilize circulating
seawater

cool the lube oil
supply

too much air

low fuel pressure

too little air

Pulsating boiler furnace fires can be
low fuel temperature
caused by __________.
Pumps normally used for fuel oil service positive
are __________.
displacement rotary
pumps
Radial cracks have developed in the
a need for plastic
castable refractory of the burner cones firebrick patchwork
after the first firing since the installation
of new furnace front refractory. This is
an indication of __________.

to the water
connection, but not
steam connection

Illustration

ensure proper action minimize heat
of the condenser
buildup in the ahead
sentinel valve or
stages
back pressure trip

two-stage centrifugal explosion proof gear non-vented plunger
pumps
pumps
pumps
inadequate cone
angle

106

a need for castable relieved stresses
refractory patchwork

SP091813

ABS

VER

263008

1

259403

1

259403

2

254414

4

250060

1

250062

5

253705

1

263302

2

268600

1

268613

1

269935

5

Steam Plants

Question
Raising vacuum on a main turbine unit
without using the turning gear will result
in __________.
Rapid fluctuation in the superheater
temperature of a steady steaming boiler
indicates __________.
Rapid fluctuation of the superheater
outlet temperature can be caused by
__________.
Rapidly discharging condensate into the
DC heater during normal steaming
conditions could cause __________.

Choice A
uneven heat
distribution in the
rotor unit
moisture carryover

Choice B
excessive time being
required to raise
vacuum
improper positioning
of superheater fires

Choice C
scoring of the rotor in
way of the labyrinth
packing
leaky desuperheater
tubes

Choice D
overheating of the
second-stage air
ejector
leaky superheater
tubes

a dirty economizer

intermittent water
carryover

excess air

dirty watersides

decrease in auxiliary decrease in
exhaust pressure
dissolved oxygen in
the feed water

Illustration

water hammer in the increase in auxiliary
economizer
exhaust pressure

Reaching which 'end point' will result in Circulation
the most severe damage to the boiler?

Carryover

Combustion

Atomization

Reaching which of the boiler end points
listed could cause the most damage to
a boiler?
Recirculation of the feed water ensures
a flow of water through the
__________.
Reduction gear bearing bridge gage
readings should be taken after
__________.

Combustion

Moisture carryover

Circulation

Heat transfer

main feed pump

economizer

standby feed pump
suction line

third stage heater

rotating the journal to all bearing caps and rotating the bearing All of the above are
the point of minimum all bearing halves
shell so that the point correct.
oil clearance
are removed
of maximum bearing
wear is directly at the
bottom

Reduction gears for main propulsion
grease cups and
turbines are lubricated by __________. gravity feed lines

oil flinger rings
leak off lines from
mounted on the shaft the lube oil cooler

spray nozzles at the
gear meshing points

Reduction gears on main propulsion
turbines are double helical cut to
__________.
Regarding main propulsion boilers,
what condition would normally be
indicated if the bridge reported that
white smoke was observed coming
from the stack?

eliminate gear tooth
thrust

reduce the size and
weight of the bull
gear
insufficient steam
atomization pressure

reduce torque

increase pinion
deflection

high fuel oil viscosity too much excess air low fuel oil
temperature

107

SP091813

ABS

VER

268601

2

263305

1

256326

1

266402

256407

250903

258221

3

4

Question
Regarding main reduction gears, when
high speed first reduction pinions and
gears are connected to low speed
pinions and gears, each contained in a
sequential portion of the gear housing,
the reduction gear unit is known as
__________.
Regarding the bearing shown in the
illustration, "X" represents the
__________.
Regarding the boiler shown in the
illustration, the burners are to be placed
at __________.
Regarding the governor shown in the
illustration, what would occur as the
result of a speed increase by a ship's
service turbo generator?
Relief valves in the fuel oil service
system discharge to either the service
pump suction or the __________.

Choice A
nested

Choice B
locked train

Choice C
articulated

Choice D
none of the above

template used for
bearing offset

lower bearing half

upper bearing half

vacated bearing shell
space

arrow "F"

arrow "K"

Remote water level indicators, operate
on the principle of __________.

arrow "L"

Steam Plants

SE-0017

none of the above
SG-0007

The governor
weights will move
inward.

The lifting beam is
raised.

The pilot valve is
lowered.

Oil is pumped into
the operating
cylinder.

settling tanks

recirculating line

simplex fuel oil
strainer

slop retention tank

different refractive
properties of steam
and water

increased feed rates different chemical
at higher steam
properties of steam
demand
and water

different pressures
which result from the
comparison of the
varying water level in
the drum with that of
a constant head

D

E

2

3

Illustration

Results of the flue gas analysis indicate A
a high percentage of carbon dioxide
and a low percentage of carbon
monoxide, approaching maximum
efficiency. This condition coincides with
which area(s) on the graph shown in the
illustration?

B and C

SE-0009

SG-0021

108

SP091813

ABS

VER

258221

2

266002

2

266002

1

261009

4

252550

1

252550

2

250700

3

251701

2

251307

6

269926

1

255303

1

Steam Plants

Question
Results of the flue gas analysis indicate A
a high percentage of carbon monoxide
and an extremely low percentage of
carbon dioxide. This condition
coincides with which area on the graph
shown in the illustration?

Choice A

Choice B
B and C

Choice C
D

Choice D

Illustration

E

SG-0021

Rotating flyweights acting against a
governor
reducing valve
safety valve
spring force makes up a simple type of
__________.
Rotating flyweights, acting against a
feed water regulator safety valve
governor
spring force, will provide a simple type
of __________.
Rotor axial thrust developed in a
the nozzles
the stationary blades the moving blades
reaction turbine is the result of a steam
pressure drop across __________.

feed water regulator

Routine maintenance of boiler sliding
feet should include __________.

wire brushing to
remove scale, rust,
and dirt
painting the sliding
surfaces to prevent
corrosion
water headers

painting the sliding
surfaces to prevent
corrosion
Routine maintenance of boiler sliding
wire brushing to
feet should include __________.
remove scale, rust,
and dirt
Rows of tubes installed along the walls, screen tubes
floor, and roof of the furnace are called
__________.
Safety valve gags should only be
compression of the
installed hand tight in order to prevent valve spring
__________.
Safety valves should be set to lift at or Marine Power Plant
below the maximum working pressure Guide
allowed by the __________.
Salinity cells are strategically installed in quantity of the
distilling units to indicate the
distillate produced
__________.
Saltwater contamination of condensate DC heater
could occur at which component?

removing all grease
from around bolts
torquing retaining
bolts on the
stationary base
downcomers

torquing retaining
bolts on the
stationary base
removing all grease
from around the
bolts
water walls

reducing valve

both the moving and
stationary blades

bending of the valve damage to the gag
stem

over pressurizing the
valve body

Marine Engineering
Regulations

Certificate of
Inspection

Marine Engineer's
Manual

quality of the
distillate produced

presence of leaks in all of the above
the flash chambers

After condenser

Fresh water
evaporator

109

Inter condenser

SP091813

ABS

VER

259494

2

255003

1

259246

1

251553

251553

251553

251558

251557

Question
Scale formation on the waterside of
boiler tubes is generally produced by
__________.
Scale in the air ejector first-stage nozzle
could cause a decrease in the
__________.
Scale prevention in boiler water is
accomplished by adding treatment
chemicals to __________.
Scavenging air is supplied to steam
soot blower elements to __________.

Choice A
the salts of calcium
and magnesium

Choice B
metal oxides in the
waterside

air ejector steam
supply pressure

low pressure turbine condensing
exhaust temperature temperature in the
condenser
solidify the scale as increase boiler water cause the water to
powder
acidity
be neutral

Scavenging air is supplied to steam
soot blower elements to __________.

provide cooling air
prevent buildup of
when soot blower
soot on the element
elements are rotating
through blowing arcs

Scavenging air is supplied to steam
soot blowers to __________.

prevent the backup
of combustion gases
into soot blower
heads

2

3

precipitate scale
forming salts into
sludge
prevent back up of
combustion gases
into soot blower
heads

provide cooling air
prevent build up of
when soot blower
soot on the element
elements are rotating
through blowing arcs

prevent the backup
of combustion gases
into soot blower
heads

Scavenging air lines are connected to
keep the periscope
boiler stack periscopes to __________. tubing from warping

keep the mirrors
from misaligning

maintain a negative
pressure in the
periscope line

prevent stack gases
from contaminating
the periscopes
internal components

Scavenging air pressure is provided to
the steam soot blowers to
__________.

II only

Both I and II

Neither I nor II

I only

Illustration

prevent overheating
of adjacent tubing

prevent warping of
the cams when
exposed to high
temperature steam

2

Steam Plants

prevent overheating
of adjacent tubing

Choice D
accumulations of
phosphates in the
feed water
condenser vacuum

provide cooling air
prevent the escape
when soot blower
of steam into the
elements are rotating inner casing
through blowing arcs

4

6

Choice C
dissolved oxygen in
the waterside

I. keep steam from accumulating in the
soot blowing element while another
element is being operated
II. prevent corrosive combustion gases
from entering the elements when the
system is secured

110

SP091813

ABS

VER

258001

1

258001

2

254213

2

254213

3

254213

1

259400

2

258008

3

259732

1

258803

1

261212

1

261212

2

253501

4

Steam Plants

Question
Sediment in fuel oil will cause
__________.
Sediment in fuel oil will cause
__________.
Serious tube leaks in the air ejector
after condenser assembly may cause
__________.
Serious tube leaks in the air ejector
condenser assembly may cause
__________.
Serious tube leaks in the air ejector
condenser assembly will cause
__________.
Severe priming in a boiler can cause
damage to the __________.
Shortly after shutting off the fuel to a
boiler which is to be secured, the
__________.
Should one boiler on a two boiler vessel
suffer serious tube damage, the Officerin-Charge, Marine Inspection may issue
a permit (Form CG-948) to proceed to
another port for repair __________.

Choice B
panting in the
furnace
clogging of the fuel
oil heaters
fouled nozzles

clogged steam
strainers

high salinity content

clogged steam
strainers

fouled nozzles

superheater

steam drum internals feed water regulating
valve
superheater vent
burner registers
may be closed
should be closed

control
desuperheater
feed stop must be
closed

as long as no cargo
or passengers are
being carried

all of the above

air cock should be
opened
only if the vessel's
Certificate of
Inspection is valid
and has not expired

Choice C
excessive white
smoke
wear in the sprayer
plates
an overflow of the
contaminated drain
inspection tank
an overflow of the
contaminated drain
inspection tank
loss of vacuum

Illustration
Choice D
clogged atomizer tips

Choice A
sputtering of
atomizers
wear in the fuel oil
pumps
clogged steam
strainers

only upon written
application of the
master, owner, or
agent of the vessel

all of the above
an overflow of the
atmospheric drain
tank
an overflow of the
atmospheric drain
tank
faulty steam
pressure

Should the superheater outlet
dirty steam
thermometer indicate an excessively
generating tube
high temperature on a single furnace
surfaces
boiler, the cause could be __________.

too much excess air the fuel oil being too all of the above
viscous

Shrouding on impulse turbine blading is
held in place by __________.
Shrouding, with regards to steam
turbines, is rolled to the curvature of the
blade ends and fitted to the blade
__________.
Single-element automatic feed water
regulators are controlled by the
__________.

peening the tenons

locking keys

roots

circumferential
dovetails
tenons

seal strips

dovetails

temperature in the
steam drum

water level in the
steam drum

pressure in the
steam drum

feed water flow to
steam drum

seal welding

111

SP091813

ABS

VER

252701

1

252701

4

252700

1

268704

1

267800

1

259180

4

254603

2

251201

2

250502

2

269932

1

257112

1

Steam Plants

Question
Slag buildup on boiler furnace refractory
is undesirable because it causes
__________.
Slag caused by water in the fuel oil will
__________.

Choice A
Choice B
Choice C
peeling or spalling of excessive cooling of shrinking of the
the brickwork
the brickwork
brickwork
form a protective
coating thus
increasing its life

Slagging of boiler furnaces is a slow
fuel oils having high
progressive action which is accelerated ash content
by __________.

Choice D
fracturing of the
anchor bolts

seal refractory joints expand at a different increase the furnace
thereby improving its rate and result in
efficiency because of
function
damaged refractory reduced firebox
turbulence
low firing rates
prolonged feed water burning diesel fuel
contamination of fuel
oil

Sliding contact bearings are classified
into two general categories: journal
bearings and __________.
Sludge tanks are used in an oil
lubricating system to receive
__________.

radial bearings

needle bearings

makeup oil that is to foreign liquid matter, bilge slops that can
be added to the
discharged from the be reclaimed after
system after settling lube oil purifier or the clarification
stripping pump

all of the oil that
passes through the
lube oil coolers

Sodium sulfite is added to boiler water
to chemically react with any
__________.
Sound is produced by the illustrated
device by the __________.
Spray attemperators are commonly
used to __________.
Stack type air heaters are bypassed
when a vessel is in port in order to
prevent __________.

dissolved oxygen
present in the water

potassium
phosphate present in
the water
rapid oscillation of
"B"
cool the inter
condenser
corrosion of the
heater due to the low
stack temperatures

phenolphthalein
present in the water

Standing watch in the engine room, a
high reading is only indicated at the
salinity cell labeled "6" shown in the
illustration. This would be the probable
result of __________.
Steam assist fuel atomizers are
converted to straight mechanical
atomizers in order to __________.

a minor tube leak in a faulty cell at this
the distillate
location
condenser in section
III

the compensating
temperature is set
too low for this cell
location

All of the above

raise steam on the
idle boiler

meet minimum boiler provide the best fuel
steam demands
economy

vertical vibrating
movement of "E"
deaerate condensate
insufficient air supply
to the fires due to the
pressure drop across
the heater

Illustration

dissolved carbon
dioxide present in
the water
high speed rotation
of "B"
reduce steam
temperatures
interference with the
operation of the soot
blowers

cold start a boiler
with diesel oil

112

thrust bearings

roller bearings

rapid input of steam
or air through "F"
aerate makeup
distillate
localized heat
stressing of air
heater surfaces

GS-0099

GS-0053

SP091813

ABS

VER

250805

2

250805

1

254200

2

250160

250144

4

2

250905

1

252818

1

251200

4

250200

1

261224

2

Steam Plants

Question
Choice A
Steam baffles are installed in the steam direct the flow of
drum of a water-tube boiler to
steam to the
__________.
desuperheater inlet

Choice B
reduce the
possibilities of
carryover

Choice C
Choice D
prevent water return increase the velocity
of the steam and
water mixture

Steam baffles are used in the steam
drum of a water-tube boiler to
__________.
Steam condensed in the air ejector
intercondenser, drains to the
__________.
Steam drains from fuel oil heating coils
can be returned to the condensate and
feed water system __________.

support the drum
reduce the possibility extend the internal
safety valve nozzles of carryover
feed pipe

Steam drains from the potable water
system hot water heater would be
collected in the __________.
Steam drum water level indicators must
be calibrated to compensate for density
differences between the indicated drum
water level, and the actual drum water
level. If no compensation is made, the
indicator will show a __________.

deaerating feed
water heater

contaminated drain
inspection tank

gland exhaust
condenser

first stage heater

lower level than
exists in the drum
with the error
becoming greater as
the drum pressure
decreases

lower level than
exists in the drum
with the error
becoming greater as
the drum pressure
increases

higher level than
exists in the drum
with the error
becoming greater as
the drum pressure
decreases

higher level than
exists in the drum
with the error
becoming greater as
the drum pressure
increases

Steam escaping from the boiler casing
is a good indication of __________.

a leaking tube

a leaking water wall
header

a leaking hand hole
gasket

all of the above are
individually correct

Steam leaving the desuperheater is
used to __________.

operate the ship
service turbo
generator

operate auxiliary
equipment

provide steam for
propulsion during low
speed operation

Steam line water hammer can be best
prevented by __________.

supply additional
steam for propulsion
during overload
conditions
always opening
steam valves rapidly

keeping lines drained replacing all
and insulated
90°Elbows with
capped tees
pressure drop taking dummy piston and
equalizing holes
place through the
cylinder arrangement provided in the
moving blades
turbine wheel

Steam passing through a multistage
impulse turbine does not impart any
appreciable axial thrust to the rotor.
This is primarily due to the
__________.

atmospheric drain
tank

Illustration

remove boiler water
dirt deposits

after condenser drain vent condenser drain main condenser
tank
tank
through the loop seal

through a direct
through a vacuum
after being collected after first passing
connection to the
drag line connection in the drain
through the DC
heating drain header to the fuel heater
inspection tank
heater

113

keeping steam
temperature below
the saturation point
steam velocity
decreasing through
the nozzle
diaphragms

SP091813

ABS

VER

251557

7

262201

1

256506

3

256506

4

256506

5

250005

250010

5

1

250600

3

261228

2

259092

1

Steam Plants

Question
Steam soot blower piping should be
thoroughly drained before operating to
prevent __________.

Choice A
accidental burner
flameout

Choice B
Choice C
condensate and feed water hammer
water contamination damage and
nozzle/element
erosion
saturated steam
superheated steam desuperheated
steam
absorb contaminants remove solids
decrease viscosity

Steam supplied to the main propulsion
turbines is __________.
Strainers are installed in boiler fuel oil
service lines to __________.
Strainers are installed in boiler fuel oil
collect water
remove solids
service lines to __________.
Strainers are installed in boiler fuel oil
absorb contaminants collect water
service lines to __________.
Superheated steam is provided to
I only
II only
operate the main steam turbine instead
of saturated steam due to its
__________.

adsorb water
absorb contaminants

decrease viscosity

remove solids

Both I and II

Neither I nor II

Both I and II

Neither I nor II

by direct contact with by hot brick work
the flame
minimize turbine
secure shroud bands
rotor axial thrust
to turbine blading.

by gases passing
over them
balance the turbine
rotor assembly

from the fuel bed

total alkalinity in the
water

methyl orange that
should be added

dissolved salts from
sea contamination

II only

phosphates present
in the water

114

Illustration

wet steam

decrease viscosity

I. higher thermal energy per pound
II. lesser erosive action on turbine
blading
Superheated steam is provided to
I only
operate the main steam turbine instead
of saturated steam due to its
__________.
I. higher thermal energy per pound
II. lesser erosive action on turbine
blading
Superheaters of the convection type are
heated __________.
Tenon peening is a technique employed
by turbine manufacturers to
__________.
Testing boiler water for chloride content
will indicate the amount of __________.

Choice D
overheating the
economizer

secure turbine
blading to the rotor

SP091813

ABS

VER

250309

1

254605

1

256312

2

267400

1

256516

1

250700

1

256354

3

256343

1

259060

1

Steam Plants

Question
Choice A
That portion of the steam drum,
end plate
containing a manhole for internal
access to the drum, for the purpose of
cleaning, inspecting, and carrying out
repairs, is called the __________.
The ability of the device illustrated to
upward movement of
produce sound is greatly affected by the "E"
adjustments to "B". Another factor that
can affect the proper operation of this
device is the __________.
The absence of carbon monoxide in the
flue gas of a boiler indicates
__________.
The adjustable spherically seated selfaligning bearing housings used in main
turbines are provided with oil deflector
rings. The function of these rings is to
__________.
The advantage of a counterflow fuel oil
heater, as compared to a parallel flow
fuel oil heater, is that the counterflow
heater __________.
The advantage of installing water wall
tubes in a boiler furnace is to
__________.
The amount of fuel oil atomized by a
steam atomization burner depends on
the atomizing steam pressure, the fuel
pressure and the __________.
The amount of oil atomized by a straight
mechanical fuel oil burner depends on
the sprayer plate size and the
__________.
The amount of sodium phosphate in
treated boiler water can be measured
by a/an __________.

Choice B
wrapper sheet

Choice C
drumhead

Choice D
tube sheet

steam pressure
being maintained at
+/- 10% of design

changing of the
orifice at "I"

overall length of "K"
GS-0099

efficient combustion insufficient air

contaminated fuel oil low carbon content
of fuel

ensure efficient
lubrication of the
bearing

prevent the leakage
of main steam into
the oil

prevent the external direct the flow of oil
leakage of oil out of through the bearing
the bearing housing

produces a higher oil
temperature at any
given steam
temperature
increase the flow of
gases through the
furnace
sprayer plate size

has a larger heat
transfer area
providing greater
heat transfer
decrease the flow of
gases through the
furnace
oil return pressure

has thinner tube
is not subject to
walls providing
coking if overheated
greater heat transfer

oil return pressure

fuel oil pressure

forced draft pressure furnace air pressure

alkalinity test

phosphate test

chloride test

115

Illustration

increase heat
permit higher
transfer to the mud combustion rates
drum
furnace air pressure windbox pressure

sodium phosphorous
test

SP091813

ABS

VER

251551

2

260801

2

262401

2

250146

3

254309

2

254301

3

250100

2

261405

4

261405

3

268810

1

250003

1

Steam Plants

Question
The arc through which a steam soot
blower element blows is regulated by
the __________.
The astern element of a main
propulsion turbine is usually designed
as a/an __________.
The astern guarding valve on main
propulsion steam turbine units must be
open when a vessel is __________.

Choice A
control air pressure

Choice B
direction of element
rotation

Choice C
steam supply
pressure

Choice D
cam profile

multiple entry, helical single entry, double
flow turbine
flow turbine

Curtiss stage,
impulse turbine

Parsons stage,
reaction turbine

at full sea speed

running with a warm loading cargo
bearing

The atmospheric drain tank (ADT)
normally drains to the _______.

main and/or auxiliary reserve feed tanks
condenser

maneuvering into
port

The automatic recirculating valve in the air ejector
main condensate recirculating line is
condensate
controlled by a temperature sensor
discharge
which is located at the __________.
The automatic recirculating valve in the
main condensate recirculating line is
designed to be controlled by which
method?
The auxiliary exhaust system shown in
the illustration can be supplied by steam
from the __________.
The axial position of a turbine rotor is
controlled by the thickness of the
__________.
The axial position of a turbine rotor is
normally adjusted by varying the
thickness of the __________.
The base ring shown in the illustration is
identified by the letter __________.

main condensate
pump discharge

main and/or auxiliary distillate tank
air ejector condenser
condensate inlet to main condensate
the main air ejectors pump suction

Thermostatic control Main condenser salt Exhaust steam
water pressure
pressure controller
controller

Preset electric timing
device

turbo generators

distilling plant

IP bleed system

Illustration

LP bleed system

SG-0024
thrust bearing collar

thrust bearing filler
piece

journal bearing
shims

labyrinth packing fins

thrust bearing shoes journal bearing
shims

labyrinth packing fins thrust bearing filler
piece

A

D

The best conductor of heat in a marine steel
boiler is __________.

C

E
SE-0012

water

116

steam

brick

SP091813

ABS

VER

268300

1

250719

9

251402

1

253512

1

256409

1

256409

2

256506

1

256506

2

252400

1

253703

4

253401

3

250701

3

Steam Plants

Question
The best indication that a bearing is
being properly lubricated is by the
__________.

Choice A
oil pressure at the
lube oil pump
discharge

The boiler downcomers shown in the
illustration are __________.

exposed to the
radiant heat of the
furnace
fuel oil entering the air supply entering
furnace
the furnace
minimum boiler load steady boiler load

installed directly
adjacent to the
superheater
steam leaving the
superheater
overload operation

supported by
refractory

fuel oil heater
discharge

contaminated drain
inspection tank

fuel oil settler tank

double bottom fuel
tanks

fuel oil heater
discharge

fuel oil settler tank
high suction

fuel oil settler tank
low suction

fuel oil storage tanks

coarse strainers

magnetic strainers

discharge strainers

cestus strainers

The boiler fuel oil system suction
'cold' strainer
strainers are also known as the
__________.
The boiler gage glasses should be
test the feed water
periodically blown down to __________. stop-check valve

'hot' strainer

'fine' strainer

magnetic strainer

provide accurate
maintain the proper
water samples for
water level in the
the second assistant steam drum

remove any
sediment buildup in
the gage glass

The boiler main feed pump aboard ship pump operates at a
can operate with high temperature
high discharge
water without becoming vapor bound
pressure
because the __________.

constant-pressure
area above the
governor controls the impeller eye is
discharge pressure vented to the main
condenser

minimum required
net positive suction
pressure is provided
by the DC heater

The boiler main feed stop check valve
is located nearest the __________.
The boiler screen tubes shown in the
illustration connect the __________.

first stage feed water
heater outlet
upper front header
and steam drum

main feed water
regulator inlet
steam drum and
mud drum

The boiler economizer provides
additional heat to the __________.
The boiler feed water control valve
varies the unity relationship between
steam and water flow during periods of
__________.
The boiler fuel oil service pump
normally takes suction from the
__________.
The boiler fuel oil service pump
normally takes suction from the
__________.
The boiler fuel oil system 'hot' strainers
are also known as __________.

DC heater feed
water outlet
upper front header
and water drum

Choice B
lube oil strainer
condition during
cleaning and
inspection
located away from
furnace heat

117

Choice C
Choice D
oil temperature
oil temperature
indicated by the
leaving the lube oil
bearing thermometer cooler

boiler water drum
inlet
lower front header
and steam drum

Illustration

SG-0008

feed water entering
the boiler
load change

SG-0008

SP091813

ABS

VER

250701

1

251550

1

250601

1

250602

1

252400

2

252802

5

250307

1

250704

1

250704

4

255500

1

267803

4

252709

1

Steam Plants

Question
The boiler shown in the illustration has
its screen tubes connecting the steam
drum and the component label '____'.
The boiler shown in the illustration,
arrow "O" indicates the __________.
The boiler superheater shown in the
illustration is a/an __________.
The boiler superheater vent, shown in
the illustration, is connected to the part
labeled '____'.
The boiler water gage glasses should
be blown down __________.

Choice A

Choice B

I

G

Choice C
F

Choice D

Illustration

D
SG-0008

main generating
tubes
horizontal U-type

superheater tubes

screen tubes

overdeck convection- vertical U-type
type
M
D

C

soot blower elements
overdeck integraltype
J

SG-0007
SG-0007
SG-0007

when you are in
doubt about the
water level
The boiler water level begins to fall very reduce the firing rate
slowly due to the sudden failure of a
of the boiler
water wall tube. In response to this
situation, you should continue the feed
water supply and immediately
__________.
The boiler wrapper sheet, shown in the A
illustration, is indicated by arrow
__________.
The bottom blow valve on a water-tube steam and water
boiler is usually attached to the
drum
__________.
The bottom blow valve should be used is at full load
to remove sludge and solids which have
settled out of circulation after the boiler
__________.
The BTU value of fuel oil is determined open cup test
by a/an __________.
The bulk of the solid material entering a discharged with the
centrifugal purifier with lube oil is
water
__________.
The burner front refractory should be
the burner flame
replaced when the slag accumulation
pattern to be
causes __________.
distorted

twice each day on
the midnight and
afternoon watches
secure the forced
draft fans

every 12 hours of
steady boiler
steaming operation
secure the fires and
secure the feed
water when the level
falls out of sight in
the gage glass

when the boiler water
level changes in a
steaming boiler
gag the drum safety
valves to prevent
loss of steam

B

H

I
SG-0007

boiler mud drum

external
downcomers

floor tubes

is at low load

is secured

is being brought up
to steaming pressure

calorimeter

hydrometer

viscosimeter

trapped in the bowl

trapped in the filter

forced out the
overflow

slight radial cracking the flame scanners
around the burner
to sense false
cones
signals from the
glowing brickwork

118

overheating of the
burner atomizer tips

SP091813

ABS

VER

250123

2

250123

1

251557

Question
Choice A
The Butterworth heater (tank cleaning 130 psi
heater) shown in the illustration is
designed to operate at a nominal steam
pressure of approximately ________.

Choice B
240 psi

The Butterworth heater shown in the
illustration receives steam at
approximately __________.
The combustion air pressure is
increased when using the steam soot
blowers to 'blow tubes' in order to
__________.

170 psi

Choice C
450 psi

Choice D
850 psi

Illustration

SG-0005

130 psi

205 psi

850 psi
SG-0005

I only

II only

Both I and II

Neither I nor II

one of the main
burner assemblies

a permanently
installed Orsat
apparatus
second reduction
pinion

5

256331

1

268816

1

250703

I. aid in the process of removing soot
deposits
II. prevent the steam from extinguishing
the fires
The component labeled "F" as shown in one of the retractable a regenerative air
the illustration is __________.
soot blower elements heater
high speed pinion

1

The component labeled "II", as shown first reduction gear
in the illustration, is called the
__________.
The component lettered "J" shown in
water drum
the illustration serves as a __________.

251100

2

The component shown in the illustration safety valve escape
depicts a/an __________.
pipe expansion joint

spray attemperator internal feed pipe
dry pipe and shell
with a thermal sleeve and shell connection connection

SG-0006

268811

1

first reduction pinion second reduction
gear

second reduction
pinion

SE-0013

high speed pinion

1

second reduction
gear

low speed pinion

268817

bull gear

low speed pinion

268818

1

The component shown in the
illustration, labeled "I", is the
__________.
The component shown in the
illustration, labeled "III", is the
__________.
The component shown in the
illustration, labeled "IV", is the
__________.

Steam Plants

first reduction gear

first reduction gear

first reduction gear

support beam

high speed pinion

second reduction
gear

SG-0007

side water wall
header

SE-0013

screen tube header
SG-0007

SE-0013

SE-0013

119

SP091813

ABS

VER

268804

3

250802

1

259246

2

259406

1

254508

254508

254508

254507

1

2

3

2

266201

1

250160

1

Steam Plants

Question
The components in a Kingsbury thrust
bearing assembly that are responsible
for transmitting an equal thrust load to
all the shoes are called the ______.

Choice A
Leveling plates

Choice B
Inner raceways

The components lettered "O" shown in
the illustration function to __________.

clean soot off the
surrounding tubes

support the
surrounding tubes

The concentration of total dissolved
solids in boiler water could increase as
a result of __________.
The concentration of total dissolved
solids in the boiler water can increase
as a result of __________.
The connection labeled "B" in the
illustration is used to __________.

infrequent bottom
blows

provide viewing of
acid clean the
the generating tubes surrounding tubes
during cold plant
maintenance
zero water hardness dissolved oxygen
priming and
deaeration
carryover

frequent surface
blows

dissolved oxygen
deaeration

The connection labeled "C" in the
illustration, is used to __________.

The connections labeled "A" in the
illustration, are used to __________.

The connections labeled "D" in the
illustration __________.

The constant pressure governor of a
turbine-driven feed pump maintains
which of the following pressures at a
constant value for all capacities?
The contaminated drain system
normally receives drains that may be
exposed to __________.

Choice C
Outer raceways

provide a point of
admission for the
L.P. bleed steam

salt water
contamination

oil contamination

120

Illustration

SG-0007

zero water hardness insufficient blow
down

maintain a vacuum in provide a point of
the shell of the feed admission for the
water heater
steam air heater
drains
maintain a vacuum in provide a point of
the shell of the feed admission for the
water heater
steam air heater
drains
maintain a vacuum in provide a point of
the shell of the feed admission for the
water heater
steam air heater
drains
maintain a vacuum in provide a point of
the shell of the feed admission of the
water heater
steam air heater
drains
Turbine inlet
Turbine exhaust

spoiled food
contamination

Choice D
Base rings

drain condensate
from the feed water
heater to the main
condenser
provide a point of
drain condensate
admission for the
from the feed water
L.P. bleed steam
heater to the main
condenser
provide a point of
drain condensate
admission for the
from the feed water
L.P. bleed steam
heater to the main
condenser
provide a point of
drain condensate
admission of the L.P. from the feed water
bleed steam
heater to the main
condenser
Pump suction
Pump discharge

SG-0025

SG-0025

SG-0025

SG-0025

water contamination
due to boiler
treatment

SP091813

ABS

VER

250250

2

251203

2

254203

252100

261214

254408

1

1

1

2

254407

1

254407

2

256329

6

Steam Plants

Question
The contaminated steam system is
secured for repairs. Live steam is
supplied to the fuel oil heating system
and its returns are directed to the drain
tank. Considering these circumstances,
an undetected leak in an idle fuel oil
heater could eventually lead to
__________.
The control desuperheater of most
boilers functions to control __________.

Choice A
secondary
combustion

Choice B
boiler tube failures

Choice C
low stack gas
temperatures

Choice D
sputtering burners
and possible loss of
fires

superheated steam
flow

desuperheated
steam temperature

superheater inlet
temperature

superheated steam
temperature

The cooling water flow from an air
ejector intercondenser and after
condenser is discharged directly into
the __________.
The correct method of expanding a
generating tube at the boiler drum tube
sheet is to roll __________.

main condenser hot
well

auxiliary condenser
hot well

condensate and feed atmospheric drain
system
tank

to a depth less than
the thickness of the
drum tube sheet

to a depth greater
heavily at the tube
than the thickness of end prior to welding
the drum tube sheet the tube to the drum
tube sheet
thrust bearing
diaphragms

slightly at the tube
end prior to welding
the tube to the drum
tube sheet
journal bearings

maintain a proper
condensate level in
the condenser hot
well

drain excess feed
water to the distilled
water tank

The correct radial clearances between interstage packing
the rotor and the casing in a propulsion
turbine are maintained by the turbine
__________.
The DC heater automatic level dump
divert the flow of
valve is used to __________.
condensate from the
first stage heater to
the vent condenser

recirculate
condensate to the
atmospheric drain
tank

The DC Heater functions to
__________.

store, heat, and
chemically treat feed ensure recirculation
deaerate feed water water to remove
in the feed water
carbonic gas
system

The DC heater functions to
__________.
The degree of fuel oil atomization is
dependent upon the __________.

remove air from feed heat feed water
water
boiler furnace size
air pressure at the
and shape
furnace

121

store feed water

remove the major
amount of noncondensable gases
from the main
condenser
all of the above

air supply
temperature

atomizer design and
oil viscosity

Illustration

SP091813

ABS

VER

255804

1

250062

11

261227

2

252807

1

251200

1

261002

254123

254124

1

1

3

Question
The depth of fuel oil in a double bottom
tank is measured through the
__________.
The designed 'end point for combustion'
for a boiler furnace is reached when
__________.

Choice A
vent line

Choice B
depth gage

Choice C
manhole cover

Choice D
sounding tube

the amount of heat
being transferred to
the tubes reaches a
maximum no matter
how much the firing
rate is increased

panting of the
furnace
accompanied with
black smoke takes
place

the maximum rate
the boiler can
generate steam is
reached

the boiler is
operating at its
maximum fuel oil
firing rate

The designed function of fixed blades in prevent steam
an impulse turbine is to __________.
turbulence

decrease steam
velocity

equalize pressure
differences

change the direction
of steam flow

The development of pinhole leaks
where the boiler tubes enter the water
drums and headers, may be evidence
of __________.
The device shown in the illustration is
a/an __________.
The diameter of a dummy piston
installed in a reaction turbine is
determined by __________.

gas laning

soot corrosion

excess alkalinity

excess hydrazine

air ejector

deaerator

desuperheater

eductor

the length and
diameter of the
equalizing line

rotor design and the steam temperature
amount of thrust to and design RPM
be counteracted

The difference between the
main circulator loss
temperature of the condensate
discharge and the temperature
corresponding to the vacuum being
maintained at the exhaust inlet to the
main condenser is defined as
__________.
The differential temperature of the main I only
condenser circulating water during
normal operation will be affected by
__________.

condensate
depression

condensate
recession

the volume of the
exhaust trunk and
pressure drop over
the last stage
absolute condenser
temperature

II only

Both I and II

Neither I nor II

Illustration

SG-0013

I. Change in circulating pump speed
II. The addition of make up feed

Steam Plants

122

SP091813

ABS

VER

254124

2

254124

4

256347

2

Question
Choice A
The differential temperature of the main I only
condenser circulating water will be
affected by __________.
I. decrease in circulating pump
pressure
II. degree or amount of scaling or
fouling
The differential temperature of the main sea temperature
condenser cooling water will be
significantly affected by a change in
__________.
The diffuser of a burner register
acts as a shield to
assembly __________.
prevent flare back
The dirty oil inlet on centrifugal lube oil
purifiers is located at the __________.

267805

2

268810

2

267802

256342

256342

1

top of the tubular
bowl type

The disassembled thrust bearing,
Base ring.
shown in the illustration, which of the
listed parts is labeled "I"?
The disk stack and tubular shaft used in the use of an acme
a lube oil centrifugal purifier, is forced to thread screw
rotate at bowl speed by __________.

Choice B
II only

Choice C
Either I or II

Choice D
Neither I nor II

condensate pump
pressure

volume of cooling
water flow

boiler feed pump
pressure

shapes the fuel
serves to make the
particles into a cone air mix evenly with
the oil
bottom of the tubular top or bottom of the
bowl type
disk type depending
upon whether the
unit is to be operated
as a separator or
clarifier
Leveling plates.
Thrust shoes.

adds heat to the fuel
particle cone
bottom only of the
disk type

Collar.
SE-0014

wire springs

the locating pin

atomizer position to
obtain the best
mixing of air and oil

quantity of the
total volume of air
primary and
and fuel admitted
secondary air cones through the register
for best air flow

3

The distance piece in a boiler burner
register assembly, provides for
adjustment of the __________.

diffuser to attain the
desired amount of
secondary air flow

4

The distance piece in a boiler burner
register assembly, provides for
adjustment of the __________.

burner throat
diffuser position with fuel oil flame cone
opening to attain the relation to the
angle
desired amount of
atomizer tip
secondary air flow

Steam Plants

Illustration

123

the drive pin

total volume of air
admitted through the
register

SP091813

ABS

VER

269857

3

250721

10

257303

256307

250062

259241

259241

1

3

4

2

9

Steam Plants

Question
The distilled water tank has been
determined to be 75% full. The tank
connection to the pneumercator has
been disconnected for a maintenance
check. If the pneumercator operates
correctly, the gage should indicate
__________.
The downcomer tubes installed in
modern water tube boilers would
normally be located _________.
The effects of shrink and swell on boiler
water levels can be minimized by
__________.

Choice A
a value equal to
three fourths of the
actual level

The efficiency of boiler combustion can
be measured by the relative
proportions of certain elements in the
flue gases. The elements measured are
__________.
The 'end point for combustion' for a
boiler furnace is reached whenever
__________.

Choice B
a false high reading
possibly permitting
the entry of air into
the system

Choice C
the minimum value
display along the
provided scales

Choice D
the absence of
mercury in the
system

between the inner
and outer boiler
casings
providing a constant rapidly opening and
surface blow
closing the throttles
during maneuvering

inside of the boiler
inner casing

in the furnace gas
passages

avoiding rapid
opening and closing
of the throttles while
answering bells

installing an
automatic singleelement feed water
regulator

nitrogen, carbon
nitrogen, carbon
dioxide, and oxygen monoxide, and
oxygen

carbon dioxide,
oxygen, and carbon
monoxide

nitrogen, carbon
dioxide, and carbon
monoxide

the amount of heat
being transferred to
the tubes reaches a
maximum no matter
how much the firing
rate is increased

panting of the
furnace
accompanied with
black smoke takes
place

the maximum rate at the capacity of the
which the boiler can sprayer plates at the
generate steam
designed pressure
for the system is
attained

The end product of reactions occurring acid cleaning
when boiler water is chemically treated,
remain in the boiler and increase the
need for __________.

makeup feed

boiler blow down

waterside corrosion
treatment

The end products of reactions occurring makeup feed
when boiler water is chemically treated,
remain in the boiler and increase the
need for __________.

acid cleaning

boiler blow down

waterside corrosion
treatment

outside of the boiler
double casing

124

Illustration

SP091813

ABS

VER

256339

1

262200

254509

255314

2

1

1

255314

2

256518

1

258306

1

Steam Plants

Question
The entire unit which houses the
burner, air scoop, air doors and bladed
cone is correctly called the
__________.
The factor which determines the
minimum amount of steam superheat
required at the steam chest inlet of a
main propulsion turbine is the
__________.
The feed water heater shown in the
illustration is actually comprised of three
separately functioning heat exchangers.
These heat exchangers are identified
as the __________.
The feed water heater shown in the
illustration was designed to maintain the
required feed water outlet temperature
with an approximate 10" (25.4 cm) Hg
shell vacuum. If the shell vacuum is
increased to approximately 16" (40.64
cm) Hg vacuum, the __________.

Choice A
burner assembly

Choice B
register assembly

Choice C
atomizer assembly

Choice D
air duct assembly

horsepower of the
turbine

vacuum in the
condenser

moisture content in
the steam at the LP
end of the turbine

specific volume of
the steam in the low
pressure end of the
turbine

The feed water heater shown in the
illustration was designed to maintain the
required feed water outlet temperature
with an approximate 10" Hg shell
vacuum. If the shell vacuum is
decreased to approximately 8" Hg
vacuum, the __________.
The fins on the tubes of a fin type fuel
oil heater are provided to __________.

overall plant
efficiency will
increase

first stage heater,
first stage heater,
gland exhaust
inter condenser, and
condenser, and drain after condenser
cooler

inter condenser, after drain cooler, distillate
condenser, and
condenser, and fresh
gland exhaust
water drain collector
condenser

overall plant
operating efficiency
will increase

vacuum in the main
condenser will drop
as the feed heater
shell vacuum
increases

feed water outlet
temperature will
decrease

vacuum in the main
condenser will
increase as the feed
heater shell vacuum
increases

flow rate of
condensate to the
feed heater will
decrease

clean the fuel oil

The fireman/water tender secures the high water level
fires because there is no visible water
level in the gage glasses of a steaming
boiler. Upon inspection, you observe
condensate trickling down the inside of
the gage glass. This indicates
__________.

flow rate of
condensate to the
feed heater will
increase

SG-0025

SG-0025

increase heater
efficiency

low water level

steam binding of the
feed water regulating
valve sensing line
from the top of the
steam drum

125

SG-0025

feed water outlet
temperature will
increase

prevent tube erosion decrease fuel flow

priming

Illustration

SP091813

ABS

VER

256354

2

264201

1

254204

1

Question
The firing range of a steam assisted
fuel atomizer is regulated to cope with
changes in the steam demand by
varying the __________.
The FIRST adverse effect resulting
from main bearing wear in an impulse
turbine is __________.
The first and second stage air ejectors
used with large sea water cooled
steam, surface type condensers are
designed to __________.

Choice A
fuel oil return
pressure

Choice B
fuel oil supply
pressure

Choice C
steam atomization
temperature

Choice D
shape of the
atomized fuel cone

wear of radial
dummy piston
packing strips
I only

wear of gland seal
and diaphragm
labyrinth packing
II only

loosening of bearing lower steam exhaust
cap bolts
temperatures
Both I and II

Neither I nor II

I only

II only

Both I and II

Neither I nor II

secure the steam to
the main air ejector

secure the steam to
the gland seal
system
main steam outlets

stop the main
circulating pump

stop the main
condensate pump

desuperheater
outlets

safety valve nozzles

highest temperature
to which the oil may
be heated in a
storage tank

minimum
temperature to which
the oil should be
heated in the fuel oil
heater
in the recirculating
line

Illustration

I. establish vacuum
II. maintain vacuum
The first and second stage air ejectors
used with main steam condensers are
designed to __________.
254204

3
I. establish vacuum
II. increase condensate temperature

262603

1

251302

2

255803

255803

2

1

Steam Plants

The FIRST step in breaking vacuum on
a main turbine unit should be to
__________.
The fittings labeled "P" shown in the
illustration are known as the
__________.
The flash point of a residual fuel oil
should be used to determine the
__________.

main steam stops

highest temperature
to which the oil may
be heated for
atomization

The flash point of a residual fuel oil
for atomizing
should be used to determine the highest
temperature to which the oil may be
heated __________.

minimum
temperature to which
the oil should be
heated for
transferring
for centrifuging

126

in a storage tank

SG-0011

SP091813

ABS

268403

VER

1

Question
Choice A
The following information was recorded normal temperature
after a recent L.P. turbine bearing
during wear in
installation. The bearing temperature
was logged at the indicated time
intervals as:

Choice B
water in the lube oil
system

Choice C
Choice D
wiping of the bearing excessive bearing
material
preload conditions

The formation of a pit in a boiler tube is waterside deposits
most likely to occur when __________. are present

sludge is present

dissolved oxygen is
present

the tube metal acts
as a cathode

The formation of a pit in the surface of a
boiler tube is most likely to occur when
__________.
The fuel oil has been raised to the
proper temperature for the straight
mechanical atomization system of the
boiler shown in the illustration, and is
ready to light off. Which of the valves
listed must be closed just prior to
igniting the fuel?
The fuel oil meter in the fuel oil service
system should be bypassed when
__________.

waterside deposits
are present

sludge is present

the tube metal acts
as an anode

dissolved minerals
are present

J

G

A

H

Illustration

1200-110°F(43°C)
1210-123°F(51°C)
1220-136°F(58°C)
1230-149°F(65°C)
1240-153°F(67°C)
1250-155°F(68°C)
1300-155°F(68°C)
The shaft RPM and lube oil cooler outlet
temperature remained constant. The
readings indicate __________.

259493

1

252830

1

257117

256503

2

1

Steam Plants

SG-0009

transferring fuel from
storage to settler
tank to avoid
erroneous fuel
consumption
readings

conducting
programmed routine
maintenance of the
meter while
underway

127

warming the oil in the finished with engines
burner headers by
is given by the bridge
recirculation prior to
boiler light off

SP091813

ABS

VER

268901

2

251307

4

250719

4

Question
The function of a quill shaft used on a
double reduction gear main propulsion
unit is to __________.

The function of a safety valve on a
design test pressure
marine boiler is to prevent the pressure
in the boiler from rising above
__________.
The function of downcomers installed in accelerate of water
water-tube boilers is to __________.
circulation

2

261229

1

250062

254501

250902

267223

10

1

1

1

Steam Plants

maximum allowable
working pressure

Illustration
Choice D
allow for axial
flexibility between the
first reduction gear
and second
reduction pinion
the pressure used in the hydrostatic test
the accumulation test pressure
Choice C
allow for flexibility
between the highspeed pinion and
first reduction gear

decrease the end
point for moisture
carryover
pulse supply steam allow
or air to chamber "M" steam/condensate or
air to be evacuated
from the unit as
sound is produced

distribute feed water decrease the rate of
within the drum
steam generation
act as a reed to
enable the
production of sound

control the admission
of steam into
chamber "L" as part
of the process to
produce sound

The general method of reducing turbine
reaction blade vibration is by the use of
_______.
The generating tubes in an operating
boiler will overheat and possibly fail
when the boiler reaches the end point of
__________.
The gland exhaust fan draws steam
and non-condensable vapors from the
gland exhaust condenser and
discharges to the __________.
The glass used in a flat-type boiler
water gage is protected from the hot
steam and water by a/an __________.

binding wire

casing seal strips

casing diaphragms

dummy pistons

evaporation

generation

combustion

circulation

atmospheric drain
tank

atmosphere

main condenser

vent condenser

asbestos gasket

mica shield

felt cushion

copper insulator

The gravity tank in a gravity lube oil
system serves to __________.

store heated lube oil supply the lube oil
settle lube oil prior to maintain oil supply
service pump with a purifying
for several minutes
positive suction head
to bearings should
the lube oil service
pump fail

The function of item "E" shown in the
illustration is to __________.
254604

Choice A
Choice B
allow for gross radial reduce backlash in
misalignment of the the reduction gear
high-speed pinion

128

GS-0099

SP091813

ABS

VER

250021

1

258202

5

250021

2

258212

250704

1

3

256338

1

254602

1

259432

260201

251102

2

1

3

Steam Plants

Question
The greatest deterrent to heat transfer
from the fireside to the waterside of a
boiler is __________.
The greatest heat loss in an oil fired
boiler is from __________.
The greatest resistance to heat transfer
from the fireside to the waterside of a
water-tube boiler takes place in the
__________.
The greatest single overall loss of
efficiency in a marine propulsion steam
plant cycle results from __________.

Choice A
water film

Choice B
water eddies

Choice C
gas film

Choice D
gas eddies

conduction through
tube metals
steel tube wall itself

radiation through the
furnace casing
soot buildup directly
on the tube exterior

combustion gases
leaving the stack
gas film layer
surrounding the tube

incomplete fuel oil
combustion
moving water and
steam inside the
tube

Illustration

heat lost in the main poor heat transfer in mechanical losses in heat loss required for
condenser
feed water heaters
the atomization
fuel oil heating
process

The guarding valve installed in a boiler loss of steam and
bottom blow line prevents __________. water from a
steaming boiler due
to a leaking bottom
blow valve
The illustrated burner atomizer
straight mechanical
assembly is __________.

leakage from the
blow line back to an
idle boiler

entry of seawater
into idle boilers due
to leaking skin and
bottom blow valves

all of the above

used only for variable an example of a
load steam
rotary cup type
atomization
atomizer

used in a return flow
type burner
management system

The illustrated device is designed as a
__________.
The inability to maintain proper boiler
water alkalinity, phosphate, or pH levels
in a steam boiler, indicates a leak in the
__________.
The intermediate pressure bleed steam
system, shown in the illustration, is
used to supply steam at approximately
__________.
The internal feed pipe in a D-type
marine boiler __________.

water and steam
separator
economizer drain
line

oil and water
separator
DC heater

liquid eductor

steam whistle

desuperheater

superheater drain
line

35.0 psig

13.6 psig

13.6 psia

67.0 psig

SG-0022

GS-0099

SG-0024
distributes feed
guides the feed
water evenly
water toward the
throughout the steam downcomer tubes
drum

129

is located well above
the normal steam
drum water level to
assist in deaeration
of feed water

is drilled with holes to
provide even
distribution of boiler
feed water chemicals

SP091813

ABS

VER

251102

6

251102

5

251100

3

254508

4

267839

3

254507

1

252403

2

252403

1

254507

3

263003

3

263003

5

Steam Plants

Question
The internal feed pipe in a D-type
marine boiler provides ______.

Choice A
distribution of feed
water evenly
throughout the steam
drum

Choice C
cooling for the
internal cyclone
separators

Choice D
cooling for the
superheater tube
bank

I only

Choice B
guidance of the feed
water towards the
downcomers as it
enters the water
drum
II only

The internal feed pipe in a D-type
marine boiler provides __________.

Both I and II

Neither I nor II

The internal feed pipe of a power boiler
distributes the feed water into the
__________.
The item labeled "C" in the illustration,
is the __________.
The item shown in the illustration is
commonly identified as a _________.

mud drum

water drum

steam drum

economizer

low pressure drain
connection
machine shop lathe
attachment

high pressure drain low pressure vent
connection
connection
machine shop milling disk type purifier
machine attachment

low pressure steam
supply connection
bowl type purifier

The items labeled "A" in the illustration
are the __________.
The items labeled "C" and "L" as
indicated on the illustration are
commonly called ________.
The items labeled "D" and "M" as
indicated on the illustration are
commonly called ________.
The items labeled "D" in the illustration
are the __________.
The jacking gear is used in preparation
for starting a marine turbine and
reduction gear unit to __________.

low pressure drain
connections
mica sheets

high pressure drain
connections
face plates

low pressure steam
supply connections
glass plate inserts

low pressure drain
connections
allow the rotor to
cool evenly

high pressure drain
connections
allow a film of oil to
form on the spring
bearings

The jacking gear must be engaged as
quickly as possible when securing the
main turbines in order to __________.

permit rapid cooling
of the reduction
gears

prevent uneven
maintain a constant
cooling of the turbine supply of lube oil to
rotors
the main unit

Illustration

I. distribution of feed water evenly
throughout the water drum
II. guidance and distribution of
chemicals throughout the steam drum

low pressure vent
connections
cork gaskets

SG-0025
GS-0124
SG-0025
SG-0020

mica sheets

face plates

cork gaskets

glass inserts
SG-0020

130

low pressure vent
connections
prevent the gland
seal steam from
distorting the rotor

low pressure steam
supply connections
listen for rubbing
noises from the
gland seal
condenser
prevent the stern
tube bearing from
overheating

SG-0025

SP091813

ABS

VER

263006

1

263005

2

268815

5

261208

260602

256337

2

1

1

254103

1

250146

1

250146

4

Steam Plants

Question
The jacking gear on main propulsion
turbines can be used to __________.

Illustration
Choice A
Choice B
Choice C
Choice D
provide propulsion in provide reduction
reduce turbine speed lift the reduction gear
emergencies
gear tooth inspection during maneuvering casing

The jacking/turning gear mechanism of low speed gear rotor bull gear
a main propulsion geared turbine
installation is normally connected
through mechanical linkage to the
_______.
The Kingsbury bearing is equipped with absorb radial stress compensate for shaft
pivoted shoes in order to __________.
misalignments

low speed pinion
rotor

high speed pinion
rotor

The labyrinth packing ring in an
interstage diaphragm of an impulse
turbine is prevented from rotating by
_______.
The labyrinth seals used on rotating
steam turbine shafts reduces external
leakage by causing __________.

a horizontal key joint spring tension
extending into a slot exerted on retaining
rings

steam pressure
exerted on the
packing segments

the weight of the
diaphragm acting on
the packing ring

successive pressure successive
drops through the
temperature drops
seal stages
through the seal
stages

pressure increases
through successive
seal stages

increased turbulence
through successively
larger labyrinth
clearances

The last two digits stamped on a fuel oil
atomizer sprayer plate represents the
cross-sectional area ratios of the
tangential slots and orifice. This ratio
determines the __________.
The leakage of air into the pump casing
by way of the packing gland of a
condensate pump, is prevented by
__________.
The level in the atmospheric drain tank
is normally maintained by the use of
a/an __________.
The level in the atmospheric drain tank
when underway at sea, is normally
maintained by the use of a/an
__________.

density of the oil
spray

degree of
atomization

angle of the cone

capacity of the
atomizer

special packing in
the stuffing box

a water seal line to
the packing gland

an air seal line from
the compressed air
line

the vacuum in the
pump suction

keep the sleeve from maintain a wedgeturning
shaped oil film

overflow to the bilges float-type regulator

vacuum drag to the overflow to a
air ejector condenser distillate tank

overflow to the bilge float-type regulator
drain tank
draining to the main
condenser

vacuum drag to the overflow to a
air ejector condenser distillate tank

131

SP091813

ABS

VER

269859

1

269854

4

250403

1

250062

7

254205

1

254509

4

267202

2

253701

2

254104

2

269506

1

Steam Plants

Question
The level of the contaminated drain
inspection tank continually decreases
when steam is admitted to a fuel oil
double bottom tank. You can expect
__________.
The level of the drain inspection tank
continually decreases after steam is
admitted to a double bottom tank fuel oil
heating coil. You can expect
__________.
The life of the furnace lining can be
affected by __________.

Choice A
a plugged heating
coil

The limiting factor in determining the
end point for combustion is usually the
__________.
The loop seal connected to the main
condenser returns the drains from the
__________.
The lower section of the feed heater,
labeled "E" in the illustration is used as
the __________.
The lube oil coolers installed in a gravity
lubricating oil system are located
between the __________.
The main boiler feed pump discharge is
controlled by the admission of steam to
the auxiliary turbine. The admission of
steam is normally regulated by a
__________.
The main condensate pump in a steam
propulsion plant discharges directly to
the __________.
The main condenser is losing 2" Hg
vacuum every 5 minutes. In an hour,
the absolute pressure will have
increased by approximately
__________.

Choice B
higher than normal
return temperatures

Choice C
a leaking makeup
feed regulator

Choice D
a perforated heating
coil

proper heating of the higher than normal
fluid
temperatures

a leaking makeup
feed regulator

a perforated heating
coil

the quality of
installation

the service
environment

all of the above

shape of the burner

size of only the
sprayer plates

the proper
application of
inspection criteria
fuel oil pressure as
the only concern

vent condenser

inter-condenser

after condenser

ability of the forced
draft fan to supply
combustion air
all of the above

drain cooler

gland exhaust
condenser

after condenser

first stage heater

lube oil pumps and
gravity tanks

gravity tanks and
main units

gravity tanks and
lube oil sump

lube oil sump and
lube oil pumps

flyweight controlled
regulating valve

multi nozzle
arrangement

constant speed
limiting governor

constant pump
discharge pressure
governor

air ejector
intercondenser

main condenser hot
well

air ejector after
condenser

DC heater vent
condenser

6 psia

12 psia

16 psia

24 psia

132

Illustration

SG-0025

SP091813

ABS

VER

253305

1

251200

3

263001

1

264600

3

Question
Choice A
Choice B
The main feed check valve functions to check pressure
prevent backflow of
__________.
pulsations in the feed water from the boiler
line
in the event of a feed
pump failure
The main function of a desuperheater is maintain uniform
heat the water in the
to __________.
steam flow through drum while
the superheater
maintaining sufficient
while providing
flow through the
auxiliary steam as
generating tubes
required

Choice C
provide feed pump
positive discharge
head

Choice D
reduce feed pump
discharge pressure
loading

provide the boiler
with additional steam
generating surface
while providing a
sufficient reservoir
for surface blow

heat the water in the
drum while providing
additional steam
generating surface in
the boiler

The main propulsion shaft turning gear
usually connects to the free end of the
high-speed high pressure pinion
because the __________.

lubricating oil from
the high-speed
pinion can easily
supply the turning
gears

arrangement allows
for the use of a muff
type coupling for
flexibility and smooth
engagement

greatest gear ratio
between the turning
gear motor output
and bull gear can be
obtained

The main propulsion turbine can be
damaged by __________.

operating at slow
speeds

turning gears are
double reduction
worm type and
cannot mate with the
low pressure highspeed pinion
water carryover from
the boilers

prevent thermal
shock

reduce vibration

The main propulsion turbine should be
operated with the __________.
262405

1

251100

1

256200

1

258007

2

Steam Plants

The main purpose of the boiler steam
drum component shown in the
illustration is to __________.
The main reason for having a low
suction line on the fuel oil service or
settling tanks is to __________.
The main reason for keeping an
operating boiler burner register fully
open while steaming is to prevent
__________.

Illustration

maintaining vacuum using the jacking
too high
gear when there is
no vacuum
lowest practical
lowest practical
highest practical
highest practical
chest pressure and chest pressure and chest pressure and chest pressure and
the minimum number the maximum
the minimum number the maximum
of nozzles required number of nozzles
of nozzles required number of nozzles
to maintain the
possible to maintain to maintain the
possible to maintain
desired speed
the desired speed
desired speed
the desired speed
permit expansion
during pressure
surges
prevent loss of
suction during rough
weather
boiler explosions

decrease suction
head on the pump

increase the amount
of fuel available for
use
the fires being blown boiler register
out
warping

133

reduce the possibility
of priming

SG-0006

facilitate water
removal
improper fuel/air
mixture

SP091813

ABS

VER

251502

1

251501

1

266006

1

262007

2

269000

1

258202

4

258202

259490

3

1

Steam Plants

Question
The main steam stop bypass valve is
used to __________.

Choice A
isolate the main
steam stop for
repairs while
steaming

Choice B
gradually increase
the pressure and
temperature of the
main steam piping
when warming up
desuperheater outlet desuperheater inlet

The main steam stop valve on a "D"
type marine boiler is located at the
__________.
The main throttle valve on a main
nozzle diaphragm
propulsion turbine admits steam directly
into the __________.
The main turbine gland sealing system seal the turbine shaft
is designed to ______.
against air leakage
into the turbine
casing

The maintenance of reduction gear
units is principally concerned with
attention to keeping the __________.

reduction ratio
constant between
the speed of the
turbine and the
speed of the driven
element
The major heat loss in a marine boiler is used in the
from the heat __________.
economizer and air
heater
The major heat loss in an oil fired boiler used in the
is the heat __________.
economizer and air
heater
The major reason dissolved gases are condenser vacuum
removed from boiler feed water is
loss
because they may cause __________.

turbine blades

Choice C
cross-connect two
steaming boilers

Choice D
supply auxiliary
steam when the
main steam stop is
closed

superheater outlet

superheater inlet

turbine steam chest

crossover connection

Illustration

allow minimal steam regulate steam
all of the above
leakage out of the
pressure to the
gland
glands when the
main turbine is
operating at reduced
speeds
upper half of the
gears supplied with drive gears aligned
gear casing secured clean oil at the
with drive shaft
to the lower half
proper operating
pressure and
temperature
passing through the
boiler casing

of combustion gases required to change
leaving the stack
water into steam

passing through the
boiler casing

going up the stack

required to change
water into steam

corrosive conditions
in the boiler

a false boiler water
level

vapor lock in the
feed pumps

134

SP091813

ABS

VER

259770

1

259747

268301

268302

267213

7

2

1

1

267801

5

250706

1

256342

2

Steam Plants

Question
Choice A
The MAWP of a boiler is 900 psi and
825 psi
the normal drop across the
superheater is 20 psi. If the superheater
safety valve is set to lift at 825 psi, the
minimum settings of the drum safety
valves allowed by Coast Guard
Regulations would be _______.

Choice B
850 psi

Choice C
875 psi

Choice D
900 psi

The maximum allowable working
pressure of a particular boiler is 1050
psig (7340 kPa). The hydrostatic test
pressure to be used during the Coast
Guard required quadrennial inspection
will be __________.
The maximum lube oil temperature
leaving a large, main propulsion steam
turbine bearing should __________.

1050 psig (7340
kPa)

1312 psig (9146
kPa)

1575 psig (10959
kPa)

1850 psig (12855
kPa)

The maximum lube oil temperature
leaving the lube oil cooler of a main
steam turbine propulsion system should
__________.
The maximum temperature rise of oil
passing through any reduction gear set,
or bearing, should not exceed
__________.
The maximum, safe, upper limit
temperature of lubricating oil
discharged from the purifiers is
__________.
The means of circulation commonly
found in water-tube boilers is
__________.
The measured gap between the face of
the burner atomizer tip nut and the
diffuser plate, is determined by the
setting of the __________.

be about 180°F

never be more than
60°F below the lube
oil inlet temperature

never exceed 130°F be dictated only by
the existing sea
water temperature

30°F (16.7°C)

50°F (27.8°C)

70°F (38.9°C)

90°F (44.5°C)

150°F

160°F

170°F

180°F

compound

accelerated natural

cross-compound

integral

atomizer tip nut

distance piece

sprayer plate

diffuser plate

Illustration

be always
never exceed 170°F never exceed the
not exceed the
maintained at 130° F
inlet temperature by normal lube oil outlet
more than 70°F
temperature from the
centrifugal purifier

135

SP091813

ABS

VER

254509

3

252900

3

251410

1

255806

3

252820

252814

7

1

263012

1

259241

3

255702

1

252205

3

Steam Plants

Question
The mid section of the feed heater,
indicated by "F" in the illustration is
used as the __________.
The minimum design height of the DC
heater is determined by the _______.

Choice A
drain cooler

The minimum feed water inlet
temperature to a boiler economizer is
determined by the __________.
The minimum temperature
requirements for fuel oil in storage
tanks is related to the _________.
The most common cause of abnormal
fireside burning of the boiler
superheater tubes can "indirectly" be
the result of _________.
The MOST common cause of heat
blisters developing on boiler generating
tubes is due to __________.

dew point
temperature of the
stack gas
fire point of the oil

dew point
temperature of the
stack gases

Choice B
gland exhaust
condenser

Choice C
after condenser

Choice D
first stage heater

minimum net positive
suction head
required by the main
feed pump
superheater outlet
temperature

maximum
condensate pump
discharge pressure

desuperheater outlet
temperature

surface area of the
third stage heater

radiant heat transfer
in the furnace

SG-0025

pump ability of the oil size of the
containment area in
case of overflow
fuel droplets striking excessive boiler
the hot tubes
water carryover

size of the vents

waterside deposits

flame impingement

gas laning

insufficient water
circulation

The most critical period of main turbine
operation is during cold start-up, rather
than hot shutdown because
__________.

lubricant film
thickness during
start-up is
considerably less
than the dimensions
of gear surface
irregularities

differential expansion
can result from the
temperature
difference between
the rotor and rotor
casing

the danger of blade
erosion damage
from dry steam
impingement is
greater during startup

harmonic vibrations
associated with
critical speed can
easily be reached
during start-up

The most effective way to eliminate
sludge from the water drum of a boiler
is to __________.
The most harmful slag forming
compounds found in fuel oils are
__________.
The most important consideration to
take into account when water washing
the firesides of a water tube boiler is
________.

frequently use the
surface blow

chemically treat the
boiler water

wash the boiler
watersides

give the boiler a
bottom blow

iron and sulphur

vanadium and
sodium

potassium and nickel calcium and silica

combustion gases
impinging on the
tubes

the corrosive effects the rusting of boiler
of sulfuric acid
tubes

136

Illustration

possible damage to
the outer casing

the tubes being
subjected to
excessive vibration

possible damage to
the smoke periscope

SP091813

ABS

VER

264600

4

255313

1

252820

8

252820

3

259284

1

253703

253703

2

3

268414

4

256336

2

Steam Plants

Question
Choice A
Choice B
Choice C
The most likely result of water slugging excessive shaft seal contamination of the damage to the
in the steam supply to a ship service
wear
lube oil
turbine blades
turbo generator is __________.

Choice D
rapid erosion of
labyrinth packing

The most practical method of
determining the condition of a shaft
bearing while the shaft is in operation is
to __________.
The most serious fireside burning of the
boiler superheater tubes can be
INDIRECTLY attributed to
__________.
The most serious fireside burning of the
boiler superheater tubes is the result of
__________.
The most troublesome corrosive
substances in boiler water are oxygen
and __________.
The net positive suction head of a boiler
centrifugal feed pump should be
calculated over and above the
__________.
The net positive suction head of a boiler
centrifugal feed pump should be
calculated to include the feed water
vapor pressure and the __________.

perform a carbon
blot test on an oil
sample from the
bearing
the tubes being
subjected to
excessive vibration

visually inspect the
bearing

check the lube oil
temperature

combustion gases
impinging on the
tubes

fuel droplets striking excessive boiler
the hot tubes
water carryover

combustion gases
impinging on the
tubes
hydrogen sulfide

fuel droplets striking carbon steel tubes
the hot tubes
being heated above
750°F
sulfur dioxide
carbon dioxide

the tubes becoming
steam bound or dry

feed water vapor
pressure

speed of the impeller pump capacity in
gpm

impeller ratio of the
pump

impeller ratio of the
pump

speed of the impeller pump capacity in
gpm

height of the DC
heater

The normal characteristics and
allowed to stand idle thoroughly agitated
properties of lube oil will begin to break
down if contaminated with water and
__________.
The number '29' on a fuel oil burner
orifice size
cross-sectional area
sprayer plate marked '2909' indicates
ratio
the __________.

137

check the lube oil
viscosity

Illustration

ammonia

thoroughly
centrifuged

discharged at a
higher pressure

whirling chamber
size

slot cross-sectional
area

SP091813

ABS

VER

263304

1

266203

1

257806

4

260003

1

252702

2

250004

3

257301

2

256809

2

250901

1

Steam Plants

Question
Choice A
Choice B
The original bridge gage reading for a bearing wear is .010 oil clearance is .002
reduction gear bearing was measured inch
inch
as .008 inches. A year later, the bridge
gage reading for the same bearing is
.010 inches. This indicates
__________.
The over speed tripping device installed pneumatic force
hydraulic pressure
on an auxiliary turbine is automatically
actuated by __________.

Choice C
Choice D
bearing wear is .002 oil clearance has
inch
increased .010 inch

The overheating of fuel oil in the fuel oil excessive
heaters may result in __________.
atomization

clogged fuel oil
heaters

ineffective straining
of the fuel oil

The part shown in the illustration would
be located between which of the
following components of a modern
geared turbine main propulsion unit?

Between the bull
gear and line shaft
on the side of the
gear opposite the
thrust bearing.

Between the bull
gear and line shaft
on the thrust bearing
side of the gear.

The peeling of boiler refractory
shrinkage of
chemical action of
associated with slagging, is caused by brickwork adjacent to the slag on the
the __________.
slag coated
firebrick surface
refractory

high back pressure

The photoelectric cell installed as part sense light from the
of the combustion safety controls of an burner flame
automatically fired boiler will
__________.
The phrase 'boiler water column' as
water level indicator
defined in the regulations, refers to the
__________.

centrifugal force

low fuel oil service
pump discharge
pressure
Between the first
Between the rotors
reduction gears and and high-speed
high-speed pinions pinions of the high
of the high pressure pressure and low
and low pressure
pressure turbines.
turbines.
difference in the rate uneven heating of
of expansion
the brickwork during
between the firebrick boiler warm up
and slag coating

The percentage by weight of steam in a moisture percentage moisture quality
quality of steam
mixture of steam and water is called the
__________.
The phenomenon called 'shrink' causes collapse of steam
excessive formation sudden decrease in
an apparent drop in the water level of a bubbles
of steam bubbles
steam pressure
steaming boiler. This phenomenon is
caused by a/an __________.

Illustration

SE-0001

heat effectiveness

rapid increase in
feed rate

control the
open the control
close the control
modulating pressure circuit upon sensing circuit upon sensing
control circuit
an intense flame
a flame failure
vertical water leg

138

pressure head to the pressure gauge
feed water pump
reading in feet of
suction
water

SP091813

ABS

VER

268604

1

252808

1

252808

2

251311

1

257107

255600

261206

261201

253700

Question
The pinion gears used in main
propulsion reduction gear mechanisms
are generally constructed of
__________.
The plugging of an excessive number of
superheater tubes will result in
__________.
The plugging of an excessive number of
superheater tubes will result in
__________.
The popping pressure of the safety
valve, shown in the illustration, is
controlled by the __________.
The possibility of a flareback in a boiler
will be reduced if you __________.

Choice A
aluminum

Choice B
bronze

Choice C
forged steel

Choice D
cast steel

high superheater
outlet temperature

low superheater
outlet temperature

high boiler water
level

low superheater
outlet pressure

high superheater
outlet temperature

low superheater
outlet temperature

high boiler water
level

lower stack
temperatures

seat bushing
adjustment

feather guide
retaining ring

adjusting ring
position

amount of spring
compression

rotate the soot
maintain the fuel oil
blower elements one to the burner at the
complete revolution flash point
prior to lighting off

supply a minimum of purge the furnace
excess air
with fresh air prior to
lighting off

The presence of sulphur in fuel oil will
most likely cause __________.

a decrease in the
an excessive heat
ability of the oil to be content per unit
properly atomized
volume

heavy slag formation corrosion on the
on the refractory
firesides of the boiler

The pressure drop existing across the
diaphragm of a pressure compounded
impulse turbine necessitates
__________.
The pressure drop that occurs across
both the moving and fixed blades of a
reaction turbine is the result of the
__________.

installation of a
dummy piston and
equalizing line to
reduce thrust
reversing blades
causing a velocity
drop with resultant
pressure drop

circumferential
Seal stripping the
dovetailing to secure tips of the turbine
the rotor blades
blades

The pressure in the feed water system
must exceed boiler steam drum
pressure in order to __________.

prevent water
hammer in the lines

4

2

2

2

2

Steam Plants

installation of a
diaphragm packing
seal to minimize
interstage leakage
conversion of the
thermal energy to
pressure energy
always resulting in a
pressure drop
prevent air leakage
into the feed water
system

139

Illustration

SG-0018

interstage
moving and fixed
diaphragms creating blades being shaped
a nozzle effect in the to act as nozzles
steam flow
force the feed water remove the steam
into the boiler
from the steam drum

SP091813

ABS

VER

259247

1

250162

250101

251306

251203

250408

250410

5

3

1

1

Choice B
scale forms as the
result of the
crystallization of
salts, whereas
sludge may consist
of reaction products
from boiler treatment

The primary function of the
provide a source of
contaminated drain inspection tank is to make-up feed
__________.

provide a means to
preheat auxiliary
condensate

Choice C
sludge is hard and
non-adherent at
operating
temperatures,
whereas scale can
be deposited at any
boiler temperature
range
provide a means to
cool down
contaminated drains

The primary objective of the auxiliary
exhaust system is to supply steam to
the __________.
The primary operational difference
between a huddling chamber type
safety valve and a nozzle reaction type
safety valve is the __________.
The primary purpose of a control
desuperheater installed in the steam
drum of a boiler is to __________.

main condenser

main feed pumps

deaerating feed tank soot blowers

manner in which
steam pressure
causes initial valve
opening
assure a constant
volume of steam flow
through the entire
superheater under all
load conditions

principle by which
blow down is
accomplished

difference in valve
relieving capacities

manner in which
lifting pressure is
adjusted

regulate the
temperature of
superheated steam
by adding moisture

regulate saturated
steam temperature
through the
desuperheater

The primary purpose of insulating
cement is __________.

to seal joints in
brickwork

to anchor insulating
block to the casing

regulate the
superheater outlet
temperature by
cooling a portion of
the superheated
steam
to cushion the pieces
against concentrated
stresses

The primary purpose of refractory
mortar is __________.

to seal brickwork
joints

to seal tile installation to provide cushioning all of the above
joints
of individual pieces
against
concentrated
stresses

2

1

Steam Plants

Illustration
Choice D
scale is heavier than
water and forms in
lower drums and
headers, whereas
sludge is more likely
to form along the
steam drum
waterline
serve as a means for
visually examining
steam condensate
drains which may
contain oil

Question
Choice A
The primary difference between sludge scale forms only on
and scale deposits in boiler tubes is
the cooler boiler
__________.
tubes whereas
sludge forms on all
tubes

140

to fill voids in the
insulation block
layers at missing
corners or at cutouts
for anchor devices

SP091813

ABS

VER

250701

6

251000

3

256520

2

252708

1

256332

1

250104

1

251310

6

256329

1

267801

7

258400

1

255501

2

Steam Plants

Question
The primary purpose of screen tubes
installed in a marine boiler is to
__________.

Choice A
act as internal
downcomers

The primary purpose of the boiler
internal dry pipe is to __________.

prevent priming and remove all moisture
foaming in the boiler from steam leaving
drum
the boiler

The primary purpose of the heater used
in a pressurized fuel oil system is to
__________.
The primary purpose of the refractory in
a marine boiler is to __________.

reduce fuel oil
viscosity for proper
atomization
conduct the heat of
combustion away
from the water wall
tubes
completely mix air
with the fuel

The primary purpose of the sprayer
plate in a mechanical atomizing oil
burner is to __________.
The primary source of steam to the
auxiliary exhaust system is typically
supplied directly from __________.
The principal means of increasing the
amount of blow down for safety valve
shown in the illustration, remove the set
screw labeled __________.
The process of breaking up fuel oil into
fine particles to ensure good
combustion is called __________.
The proper oil inlet temperature for
centrifuging lube oil should be
__________.
The proper way to quickly reduce high
water level in a steaming boiler is to use
the __________.
The property of a fuel oil which is a
measurement of its available energy, is
known as its __________.

Choice B
protect the furnace
casing and retain
furnace heat

reduce fuel oil
specific gravity for
better combustion
protect the furnace
casing and retain
furnace heat

Choice C
protect the
generating tube bank
from the
convectional heat
transfer
permit a flow of
nearly dry saturated
steam
increase the fire
point of the fuel oil

prevent foreign
materials from
entering the steam
drum
improve the flash
point of the fuel oil

"A" and raise the
position of the ring

protect the
superheater from
convectional heat
transfer
assist in mixing
produce a fine,
prevent primary air
atomizing steam with swirling, uniform fuel mixing with the fuel
the fuel
mist
turbine driven and
the turbine gland
all of the above
reciprocating steam exhaust system
pumps
"A" and lower the
"B" and raise the
"B" and lower the
position of the ring
position of the ring
position of the ring

settling

straining

the main engine LP
bleed

Illustration

Choice D
protect the
superheater from
radiation heat
transfer

support the outer
casing

pumping

SG-0019

atomization

100° to 120°F (37.8° - 130° to 150°F (54.4° - 160° to 180°F (71.1° - 190° to 210°F (87.7° 48.9°C)
65.5°C)
82.2°C)
98.9°C)
bottom blow valve

safety valve

water column valve

surface blow valve

cetane number

heating value

viscosity index

cetane index

141

SP091813

ABS

VER

250719

10

250164

1

250301

1

268800

250708

4

1

Question
Choice A
The proportion of downcomers installed degree of superheat
in relation to riser tubes in a vertical
tube type of boiler, is dependent upon
the __________.
The purpose of a contaminated steam distill water from a
system is to __________.
harbor

The purpose of a 'peep' hole in the
boiler casing is to __________.
The purpose of a thrust bearing,
mounted between the engine and the
propeller of a steam plant power train,
is to __________.
The purpose of boiler tube curvature
shown in the illustration in the area
labeled "L" is to __________.

examine the
condition of the
flame
dampen torsional
vibrations

7

267401

1

261402

1

Steam Plants

Choice C
steam output of the
boiler

Choice D
position of the mud
drum

ensure fouled
heating coil returns
from fuel tanks do
not contaminate
boiler feed water
check the operation
of the soot blowers

distill makeup feed
for use as potable
water

transmit propeller
thrust to the hull

maintain crankshaft
radial alignment

ensure an
uncontaminated
source of feed for
the makeup
evaporator
examine the
condition of the
refractory cones
absorb gear thrust in
double helical gears

accommodate an oil compensate for the
burner for separately greater degree of
firing the superheater expansion in the
superheater area

The purpose of firebrick in a water tube I only
boiler furnace is to __________.
250411

Choice B
type of water level
control

II only

check for excess
smoke in the stack

accommodate an
allow for access to
inspection port used the superheater
to view superheater cavity
conditions while
steaming
Both I and II

Illustration

SG-0007

Neither I nor II

I. protect the generating tubes from
flame impingement
II. protect the boiler furnace inner
casing
The purpose of oil deflector rings for
turbine shafts include __________.
The purpose of shroud bands secured
to the tips of the turbine blades is to
__________.

directing the lube oil preventing oil
spray
leakage along the
shaft
stiffen the blades to increase blade
reduce vibration
resistance to
moisture in steam

142

forming the lube oil
spray pattern

removing emulsified
lube oil from the
sump
assist in maintaining strengthen the blade
radial clearances
root fastenings

SP091813

ABS

VER

253706

1

250704

2

250803

250411

251551

1

3

1

Question
Choice A
The purpose of the air chamber at the facilitate draining of
discharge side of a steam reciprocating the cylinder
boiler feed pump is to __________.

Choice B
Choice C
reduce pulsations in adjust the speed of
the feed line
the pump

The purpose of the boiler bottom blow
valve is to __________.

remove scum from
the steam drum
during steaming
The purpose of the boiler drum air cock admit air when the
is to __________.
boiler is being
emptied

control steam drum
water level in an
emergency
permit escape of air
when the boiler is
being filled

The purpose of the boiler furnace corbel I only
is to __________.

II only

I. protect the water drum from direct
flame impingement
II. support the furnace wall
The purpose of the cam-actuated
rotate the element
steam valve used in a boiler soot blower through a
system, is to __________.
predetermined
blowing arc

The purpose of the diffuser in a boiler
burner assembly is to __________.
256346

250605

268608

2

1

2

Steam Plants

Choice D
provide for the
addition of boiler
compound

Illustration

remove heavy solids all of the above
from the water drum
permit escape of air
when steam is
forming in the drum
after lighting off
Both I and II

automatically blow
the elements in the
proper sequence

automatically secure
steam to the blower
head any time the
element stops
turning

all of the above

Neither I nor II

prevent steam from
entering the soot
blower when the
element holes are
directed toward the
refractory
break up fuel oil into assist combustion by shield the flame from diffuse flame to all
a fine spray
heating incoming air the incoming air blast corners of the
while allowing some furnace
mixing of fuel and air

The purpose of the division plates
installed in boiler superheater headers
is to __________.

limit the maximum
temperature rise of
the superheater
outlet to 15°F

ensure proper steam
flow, thus preventing
'short circuiting' of
superheater loops

provide a means of all of the above
controlling steam
passage in response
to throttle demands

The purpose of the main reduction
gears is to __________.

transmit vibration
and thrust to the
ship's hull

reduce high turbine
RPM to an efficient
propeller RPM

reduce engine room
noise levels during
high speed
operations

143

provide a means of
reversing the main
engines in an
emergency

SP091813

ABS

VER

250904

1

251554

251554

261000

253705

250411

256407

256407

3

1

Question
The purpose of the mica used in a
boiler water gage glass assembly is to
prevent __________.
The purpose of the pressure control
disk installed in the soot blower
illustrated is to __________.

Choice A
overheating of the
glass

Choice B
Choice C
light refraction in the etching of the glass
glass

Choice D
leakage from the
glass

control the velocity
and distance of the
steam valve passing
from the soot blower
element

reduce the steam
supply pressure to
the soot blower
element

control the amount of
arc during rotation of
the soot blower
element

assist in the initial
opening of the valve
at the beginning of
the soot blower
operation

The purpose of the pressure control
disk installed in the multi-nozzle soot
blower, as shown in the illustration, is to
__________.

control the pressure
exerted on the steam
valve disk when the
cam secures the
steam supply

reduce the steam
supply pressure to
the soot blower
element

control the pressure increase the
exerted on the valve pressure in the
spring retainer
steam supply line for
proper soot blower
operation

The purpose of the reaction turbine
dummy piston is to ________.

counteract and
balance axial thrust
produced by the
turbine rotor

act in conjunction
with gland seal
steam to balance
turbine thrust

assist in maintaining eliminate radial
radial clearances
thrust caused by the
pressure increases
in the turbine stages

The purpose of the recirculating line
between the turbine driven feed pump
and the DC heater is to __________.

ensure a steady
boiler water level at
all loads

seal the labyrinth
ensure sufficient flow cool the vent
packing on the pump through the feed
condenser
pump at low load

6

2

2

3

5

Steam Plants

The purpose of the refractory lining of a prevent flames from assist in maintaining
water-tube boiler furnace is to
impinging on tubes the heat of
__________.
combustion within
the furnace
The purpose of the relief valve in a fuel protect the service
regulate the atomizer
oil service system is to __________.
pump from high
oil pressure
discharge pressure
The purpose of the relief valve in a fuel protect the system
oil service system is to __________.
from high discharge
pressure

support the outer
casing

control the oil
pressure regulators

regulate the atomizer control the oil
oil pressure
pressure regulators

144

Illustration

SG-0023

SG-0023

protect the
superheater from
convectional heat
transfer
supply constant
pressure to the
burner combustion
control valves
supply constant
pressure to the
burner combustion
control valves

SP091813

ABS

VER

263050

1

254419

2

257809

2

257809

4

257809

3

257117

4

254113

4

268808

1

256407

2

256407

1

Steam Plants

Choice C
relieve excess
pressure to the
turbine extraction
points

Illustration
Choice D
vent excess steam to
the main condenser

The purpose of the steam control
control steam
regulate back
valves installed in the auxiliary exhaust admission and
pressure in the
line is to __________.
maintain the proper desuperheater line
steam spray pattern
in the DC heater

preheat the
condensate before it
enters the vent
condenser

seal the vent
condenser to prevent
the escape of
condensate

The rate of fouling on the oil side of a
fuel oil heater is inversely related to the
__________.
The rate of fouling on the oil side of fuel
oil heaters is directly related to the
__________.
The rate of fouling on the oil side of fuel
oil heaters is mostly affected by the
__________.
The recirculating valve provided in a
straight mechanical boiler fuel oil
service system, should be opened when
__________.
The recommended vacuum should be
maintained in the main condenser to
__________.
The reduction gear shown in the
illustration is a/an __________.
The relief valve on the discharge side of
the fuel oil service pump may discharge
directly to the settler, or to the
__________.
The relief valve on the discharge side of
the fuel oil service pump may discharge
directly to the suction side of the pump,
or to the __________.

shape of the heating pressure on the oil in
coils in the heater
the heater

Question
The purpose of the sentinel valve
installed on a turbine casing is to
__________.

Choice A
warn the engineer of
back flow of steam
from the exhaust
trunk

Choice B
warn the engineer of
excessive pressure
in the low pressure
turbine casing

quality of steam
flowing through the
heater
steam pressure in
the heater

flow rate of fuel oil
through the heater

quality of the steam
flow through the
heater
going into
maneuvering
conditions

shape of the heating pressure on the oil in rate of oil flow
coils in the heater
the heater
through the heater
the service pump
relief valve lifts

bypassing one bank preparing to light off
of fuel oil heaters
a cold boiler

condense turbine
exhaust steam

recover latent heat
from turbine exhaust
steam
nested four-step
reduction gear
suction side of the
pump

recover sensible
heat from turbine
exhaust steam
articulated double
reduction gear
oil header return line

nested double
reduction gear
fuel oil heater inlet

fuel oil heater inlet

shape of the heating oil pressure in the
coils in the heater
heater

oil header return line double bottom fuel
tank

145

rate of oil flow
through the heater

utilize the greatest
possible amount of
energy
locked-train double
reduction gear
double bottom fuel
tank

SE-0013

fuel oil settling tank

SP091813

ABS

VER

251319

4

Question
Choice A
The relieving capacity of the
I only
superheater safety valves is considered
to be insufficient when the working
pressure of the boilers is __________.

Choice B
II only

Choice C
Both I and II

Choice D
Neither I nor II

II only

Both I and II

Neither I nor II

Illustration

I. increased
II. Decreased

251319

250022

5

1

258221

4

262402

1

267815

1

Steam Plants

The relieving pressure of the
superheater safety valves is permitted
to be reset without exchanging the
valves when the working pressure of
the boilers is __________.
I. increased
II. Decreased
The required number of pounds of
steam generated per hour to develop
contract shaft horsepower and maintain
the specified pressures and
temperatures in the plant, when divided
by the number of installed boilers, will
give the __________.
The results of a flue gas analysis
indicate a very high percentage of
oxygen, and a low percentage of carbon
dioxide. This condition coincides with
which area on the graph shown in the
illustration?
The reversing turbine is normally used
for which of the following operations?
The rotating speed of the tubular bowl
centrifuge is more than twice that of the
disk type. The reason for this is
__________.

I only

overload capacity for efficiency of each
each boiler
boiler

efficiency of each fire full power capacity of
room
each boiler

A

D

B and C

E
SG-0021

Emergency stopping Backing

Maneuvering

All of the above.

a narrow diameter
bowl is not effected
as much by windage
losses as a larger
diameter bowl

the drag bushing is
used to permit the
higher speed of
rotation

to produce a nearly
equal magnitude of
centrifugal force

the friction affecting
rotation is not as
significant with a
narrow diameter
bowl

146

SP091813

ABS

VER

265201

4

251319

259780

Question
Choice A
The safety device provided on a turbo back pressure trip
generator which closes the throttle
automatically when the cooling water to
the condenser is insufficient is called
a/an __________.
The safety valve hand lifting gear
I only
should not be used if the boiler pressure
is less than 75% of the safety valve
popping pressure in order to
__________.

Choice B
low pressure trip

Choice C
Choice D
high temperature trip over speed trip

II only

Both I and II

Neither I nor II

diameter of the
feather

diameter of the inlet
opening

diameter of the
huddling chamber

Illustration

6

1

268415

2

251553

1

250701

2

251307

5

267804

4

Steam Plants

I. provide sufficient steam flow across
the valve to prevent the collection of
scale on the seat
II. prevent cracking of the seat due to
chattering of the feather and disc
The safety valve nominal size for
free spring length
propulsion boilers and superheaters
must be not less than 1 1/2 inches and
not more than 4 inches. The term
'nominal size' refers to the __________.
The sample of oil discharged from the
device illustrated appears milky white,
and is probably due to __________.

normal operation

worn or bad bearings weaken spring below position of "P" is too
in "C"
"V"
high in the bowl

The scavenging air for soot blowers is low pressure air
supplied by the __________.
compressor
The screen tubes shown in the
F
illustration are indicated by arrow '____.'

forced draft blowers

control air regulator

all of the above

J

H

D

The set point pressure at which the first maximum steam
boiler safety valve is to lift is the
drum pressure
__________.
The size of the discharge ring used in a viscosity
lube oil purifier is determined by the
oil's __________.

boiler overload
capacity

operating design
pressure

boiler full-power
capacity

moisture content

sediment content

specific gravity

GS-0124

SG-0008

147

SP091813

ABS

VER

269080

1

268201

268711

2

1

266401

4

257005

1

250310

3

250009

3

Steam Plants

oil loss

steam loss

axial stress

wiping

throttle control
mechanism

constant speed
governor

speed limited
governor

cam operated nozzle
control valve

relieve any residual
air pressure in the
drum
maintains circulation
by forcing steam
bubbles downward in
the generating tubes

prevent a vacuum
forming in the steam
drum
supports the
superheater tube
bank

reduce the pressure
in the drum more
rapidly
provides a space for
moisture to separate
from the steam

protect the
superheater

I only

II only

Both I and II

Neither I nor II

number of burners

relative size of tubes amount of heat
and downcomers
absorbing surface

Choice A
insufficient lube oil
pressure

Choice B
high lube oil
temperatures

The source of metal particles adhering
to the magnets in a lube oil strainer is
probably from the __________.

shaft journal

The splits located in the halves of main
reduction gear bearings are aligned at
an angle to the horizontal in order to
resist __________.
The steady frequency required from a
ship service generator for electrical
power is maintained by means of a
__________.
The steam drum air cock is normally
opened when cooling down a boiler to
__________.
The steam drum in a D-type marine
boiler __________.

The steam drum installed in "D" type
boilers serve to provide __________.

2

250805

Illustration
Choice D
uneven bearing wear
due to gross
misalignment

bearing shell

Choice C
the method of
manufacture and
does affect normal
operation
reduction gears

Question
The slight wavy appearance of the tips
of reduction gear teeth is a result of
__________.

Babbitt material

acts as a receptacle
for heavy suspended
solids in boiler feed
water

I. a water reserve necessary for proper
boiler operation
II. an area for steam and moisture to
separate
The steam generating capacity of a
boiler depends upon the __________.

148

all of the above

SP091813

ABS

VER

254601

1

251557

2

251557

3

251557

4

257115

1

267801

2

258804

3

256002

267836

257300

1

2

3

Question
The steam separator as used in
conjunction with a steam whistle
normally drains to which of the listed
drain systems?
The steam soot blower piping should be
thoroughly drained before operating to
prevent __________.
The steam soot blower piping should be
thoroughly drained before operating to
prevent __________.
The steam soot blower piping should be
thoroughly drained before operating to
prevent __________.
The superheater vents should always
be open when __________.
The temperature of emulsified
lubricating oil entering a purifier from a
preheater should range between
__________.
The temperature of steam at the
superheater outlet is influenced by the
__________.
The temperature of the fuel oil received
during bunkering operations is critical in
determining the __________.

Choice A
Low pressure

Choice B
High pressure

Choice C
Main turbine

Choice D
Contaminated

accidental flameout

feed water losses

nozzle plugging

erosion of refractory

accidental flameout

feed water losses

nozzle/elements
eroding

erosion of the corbel

impinging of
generating tube
surfaces
blowing down the
boiler
110°-120°F

feed water losses

plugging of nozzles

warping of soot
blower elements

blowing tubes

lighting off the boiler the water level is
lower than normal
160°-180°F
190°-210°F

temperature of the
feed water

amount of excess air amount of moisture
contained in the
steam
flash point at which temperature to which
the fuel will burn
the fuel must be
heated

The term 'separation' as used in oil
purification refers to the removal of
__________.
The term 'shrink' relates to a change in
boiler water level which __________.

water from a mixture solids from lube oil
of oil liquids

acid contaminants
from oil

results when the
feed rate becomes
erratic during
maneuvering
results when the
feed rate becomes
erratic during
maneuvering

results in a rapid
change of steam
temperature

The term 'swell' relates to a change in
boiler water level which __________.
257300

4

Steam Plants

140°-150°F

expansion space to
leave in a tank

is due to the steam
bubbles below the
surface occupying a
smaller volume
is due to the steam
bubbles below the
surface occupying a
larger volume

149

is due to a rapid
change of steam
temperature during
maneuvering
operations

Illustration

all of the above

rate at which the fuel
can be pumped
during transfer
operations
oil from its additives

indicates a high
chloride
concentration in the
boiler water
indicates a high
chloride
concentration in the
boiler water

SP091813

ABS

VER

257300

1

257300

2

267389

2

267389

3

267802

4

261407

3

257104

1

250009

4

Steam Plants

Question
Choice A
The terms 'swell' and 'shrink' relate to a results when the
change in boiler water level which
feed rate becomes
__________.
erratic during
maneuvering
The terms 'swell' and 'shrink' relate to a results when the
change in boiler water level which
feed rate becomes
__________.
erratic during
maneuvering

Choice B
is due to steam
bubbles below the
surface occupying a
smaller volume
is due to the
volumetric change in
the size of the steam
bubbles below the
water surface

Choice C
Choice D
results from a
indicates a high
change in steam flow chloride
or firing rate
concentration in the
boiler water
result in a rapid
indicates a high
change in fuel oil
chloride
viscosity
concentration in the
boiler water

The three wing device in the unit
illustrated is maintained in its position by
item __________.
The three wing device in the unit
illustrated is maintained in its position by
item __________.
The three-wing device used in the
tubular bowl purifier, is held in place
and forced to rotate at bowl speed by
the __________.
The thrust bearing wear on a turbine
may be determined by checking the
__________.
The time taken to raise steam on a cold
boiler should always be __________.

P

Q

O

Illustration

R
GS-0124

B

P

Q

R
GS-0124

vertical shallow
flexible wire springs locating pin pressed
grooves machined
secured to the edge into the top edge of
into the bowl surface of each 'wing'
the three-wing
device
bearing drop
rotor axial position
rotor expansion rate

the time specified by
the boiler
manufacturer
The total heating surface of any steam Those parts of a
generating unit is comprised of which of boiler which are
the listed surfaces?
exposed on one side
to only the water
being heated and on
the other side to the
combustion gases,
such as the
economizer
surfaces.

drive pin pressed
into the interior
surface of the bowl
casing movement

not less than a full 24 not more than 1 full
hour
hour

as short as possible
to avoid over
expansion
Those parts of a
Those parts of a
Those parts of a
boiler which are
boiler which are
boiler which are
exposed on one side exposed on one side exposed on one side
to only the steam
to the water or steam to only the water
being heated and on being heated, and on being heated and on
the other side to the the other side to the the other side being
combustion gases, combustion gases. directly exposed to
such as the
the furnace flame.
superheater
surfaces.

150

SP091813

ABS
250308

VER
1

Question
The tube sheet shown in the illustration A
is indicated by the letter '____'.

251550

2

262602

1

251500

1

The tubes projecting horizontally
through the generating tube bank
shown in the illustration are
__________.
The turbine of a turbo-electric drive
should be secured by __________.
The turbo generator steam stop is
located between the superheater outlet
and the main steam stop valve to
__________.

256345

4

The turndown ratio an automatic
combustion control system is the ratio
__________.

259499

2

259499

1

253508

1

261218

2

261218

1

Steam Plants

Choice A

through stays

Choice B
B

Choice C
I

Choice D

SG-0008
generator support
tubes

soot blower elements steam smothering
lines

closing the main
steam stops
provide for easier
access

dynamic braking of
the generator
provide higher quality
steam for the turbo
generators

tripping the throttle
trip by hand
provide a flow of
cooling steam
through the control
desuperheater

of air to fuel for a
given firing rate

of forced draft fan
speed to feed water
flow

The two common chemicals which are carbon monoxide
the primary cause of internal boiler
and sodium sulfite
corrosion are _______.
The two most common causes of boiler carbon monoxide
corrosion attributable to boiler water are
dissolved oxygen and __________.

dissolved oxygen
and hydroxyl ions

closing the throttle by
hand
allow the use of
superheated steam
in the turbo
generator without
pressurizing the
larger main steam
line
between the highest between fuel oil
and lowest oil
pressure and
pressure at which
atomizing steam
the burner will
pressure at a given
remain lit
firing rate
phosphates and
chromates and
chromates
hydrazine

hydroxyl ions

ammonia

nitrogen

The two-element feed water regulator
functions similarly to the three-element
feed water regulator, but does not utilize
__________.
The type of turbine shown in the
illustration is a __________.

feed water flow
measurement

water level

drum pressure

pressurecompounded
reaction turbine
pressure-velocity
compounded
impulse

combination impulse
and reaction turbine

The type of turbine shown in the
illustration is classified as a
__________.

steam flow
measurement

Illustration

K

velocity-compounded pressureimpulse turbine
compounded
impulse turbine
pressurevelocity-compounded
compounded
impulse
impulse

151

pressurecompounded
reaction

SG-0008

SE-0003

SE-0003

SP091813

ABS

VER

254506

1

254509

2

250403

2

269918

4

250147

2

256512

1

266407

2

256328

1

255316

2

Steam Plants

Question
Choice A
The unit shown in the illustration is used high pressure feed
as the __________.
heater

Choice B
Choice C
combined low
Butterworth feed
pressure feed heater heater

Choice D
flash evaporator salt
water feed heater

The upper section of the feed water
drain cooler
heater indicated by "G" in the illustration
is used as the __________.

gland exhaust
condenser

first stage heater

after condenser

Illustration
SG-0025

SG-0025

The useful life of furnace refractory is
affected most by __________.

the quality of the fuel improper treatment
being burned
of boiler water

high steady steaming large and rapid
boiler loads
changes in furnace
temperature
an increase in
lifting of the relief
suction pressure
valve

The usual symptoms of cavitation in a
centrifugal pump would be
__________.
The vacuum drag line for the main
condenser is specifically connected in
which area?
The valve located between the fuel oil
header and the burner valve is known
as the __________.
The valve opening sequence for bar-lift
nozzle control valves in a marine steam
turbine is determined by __________.

noise and vibration

an increase in
discharge pressure

main tube bank

the steams first point the end of the steam lower portion of the
of entry
lane
hot well

root valve

return valve

the turbine idle
speed

pilot valves which
initiate movement of
each individual valve
bar

The variable capacity pressure
atomizing fuel oil burner functions to
__________.
The vent line from the main condenser
water boxes was not opened when the
waterside was recharged. This would
__________.

header valve

register valve

electro-hydraulic
servomotors
attached to individual
valve stems

maintain a constant
fuel temperature

the distance between
the top of the bar
and the adjusting
nuts on the valve
stems
provide a wide range provide a constant
of combustion
fuel return pressure

I only

II only

Neither I nor II

Both I and II

maintain smokeless
fuel oil atomization

I. lead to vapor binding of the main
circulating pump
II. contribute to a higher than normal
condensate temperature entering the
air ejector condenser

152

SP091813

ABS

255316

VER

1

269856

2

256501

1

258401

267831

267831

250906

1

1

3

4

Steam Plants

Question
The vent line from the main condenser
water boxes was not opened when the
waterside was recharged. This would
__________.

Choice A

Choice B
II only

I only

Choice C
Both I and II

Choice D
Neither I nor II

Illustration

I. lead to a build up of pressure on the
tube sheet of greater than 40 psig
II. prevent the design vacuum from
being attained under normal operating
conditions at sea
The vessel is currently operating at sea.
Despite troubleshooting the system,
the engineers of the vessel have been
unable to transfer fuel to the settler. As
the settler level is becoming
dangerously low, they should now
__________.
The viscosity of a residual fuel oil is
measured in Saybolt __________.
The water level in a steaming boiler has
risen to within 2 inches of the top of the
top gage glass. Your immediate action
should be to __________.

repeat all the steps
they have taken

call out all hands for utilize a rubber
assistance
impeller portable
pump

reduce the vessel's
speed and other
plant loads

Milliliters Universal

Millimeters Universal Seconds Furol

Minutes Universal

secure the fires and
open the bottom
blow valve

reduce the feed
water flow to the
boiler

secure the feed
water flow to the
boiler

open the surface
blow line

The water seal in a centrifuge,
operating at normal speed, prevents
the lube oil from discharging from the
water outlet. Another function of the
seal is to __________.
The water seal used in a tubular bowl
centrifugal purifier is kept in the bowl
during normal operation by
__________.
Thin sheets of mica are installed in
boiler gage glasses to __________.

develop permanent
emulsions with the
lube oil

provide a means of
'washing' the oil as it
passes through the
bowl

keep the bowl at a
temperature below
that of the lube oil
input

an inclined port or
passage rising from
the bowl side
towards the center
reduce the possibility
of the glass from
becoming etched

an inclined port or
passage rising from
the center towards
the bowl side
limit the possibility of
glass being blown
out into the fire room

baffled orifice

provide an area for
separated water to
pass and create a
path to remove the
water from the bowl
top cover

153

GS-0124
lower the
conductivity of the
water in the glass

prevent gasket
leakage

SP091813

ABS

250906

VER

3

261019

1

258007

1

261400

3

263306

1

263302

251310

250303

4

3

6

Steam Plants

Question
Thin sheets of mica are installed in
boiler gage glasses to __________.

Choice A
I only

Choice B
II only

Choice C
Both I and II

Choice D
Neither I nor II

Illustration

I. reduce the effects of thermal
exposure on the glass
II. enhance the ability of the operator to
observe the water level from a distance

Thin tipping is a type of turbine blade
design primarily used to __________.

increase the effective
blade surface area
without increasing
blade weight

prevent any pressure
drop from occurring
through the moving
blades in an impulse
turbine

provide a means for reduce losses due to
mounting the
blade tip leakage in
shrouding on the
reaction turbines
blade tips

Throttling the burner air register of a lit
burner could result in __________.

carbon deposits on
the register doors

carbon deposits on
the furnace walls

Thrust bearings are installed in main
propulsion turbines to __________.
Thrust clearances indicated on a main
propulsion turbine bearing clearance
diagram are __________.

cancel centrifugal
thrust force
normal clearances
for operation under
routine steaming
conditions

control rotor axial
movement
cold clearances to
which the bearing
was initially set

too much excess air excess combustion
for combustion
temperature in the
furnace
eliminate the need
maintain radial
for dummy piston
clearances
minimum clearances maximum
that indicate when
clearances which
bearing renewal is
should not be
necessary
exceeded when the
turbine is warmed up

To accurately measure the amount of
wear on a high speed pinion journal
bearing with a bridge gage, you must
__________.
To adjust the amount of safety valve
blow down, as shown in the illustration,
you would reposition the part indicated
by arrow '_______.'
To allow for water drum expansion and
contraction, most main propulsion
boilers are fitted with __________.

be sure that the area
of greatest wear is at
90° to the measuring
pin
A

shift the journal to
raise the journal to a roll the bearing shell
position the pinion off height equal to the oil until the wearing
center in the bearing clearance
zone is at the bottom
B

C

D
SG-0018

U-bend tubes

expansion joints

154

sliding feet

spring supported
pipe hangers

SP091813

ABS

VER

251601

1

268100

1

251557

1

251304

251311

254106

254106

2

2

1

4

259747

4

268412

1

Steam Plants

Question
Choice A
Choice B
Choice C
To assure a long service life for boiler
maintain a high
patch refractory with properly secure
refractory materials after installation, the furnace temperature plastic chrome ore
refractory with
most effective method is to
at all times
anchor bolts
__________.

Illustration
Choice D
avoid rapid
temperature
changes and follow
recommended
operating procedures

To assure the main propulsion turbine
bearings are receiving the proper lube
oil supply, you should check the
__________.
To avoid acid corrosion of the
economizer tubes when blowing tubes
__________.
To change the amount of blow down of
the safety valve shown in the
illustration, you must change the
position of the __________.
To change the lifting pressure of the
safety valve shown in the illustration,
you must readjust the part labeled
__________.
To combat galvanic corrosion,
condensers utilizing copper-nickel
waterboxes are usually fitted with
__________.
To combat galvanic corrosion,
condensers utilizing copper-nickel
waterboxes are usually fitted with
__________.
To comply with Coast Guard
Regulations (46 CFR), which type of
boiler listed shall be subjected to a
hydrostatic test at one and one half
times maximum allowable working
pressure?
To determine the extent of lube oil
system contamination you would
__________.

bull's-eye in the
lube oil temperature flow through the
gravity tank overflow at the cooler outlet
sight glass at the
bearing

lube oil strainer
magnets

raise boiler pressure lower boiler pressure lower water level

drain the soot
blowers headers

feather guide

huddling chamber

adjusting ring

compression screw

SG-0018
A

B

C

D
SG-0018

bonding straps

iron or steel anodes

protective coatings

all of the above

bonding straps

zinc anodes

protective coatings

all of the above

All water-tube boilers All water-tube boilers All water-tube boilers All fire-tube boilers
once a year.
once every 4 years. to which extensive
once every 2 years.
repairs have been
made.

watch for variations
in the lube oil pump
discharge pressure

observe the oil flow
in the sight glasses

155

inspect the purifier
maintain a close
for separated foreign watch on bearing
matter
temperatures

SP091813

ABS

VER

251310

5

251311

251608

3

1

261223

2

259491

1

256342

251603

263004

1

1

1

253706

2

251700

2

Steam Plants

Question
To increase the blow down of a nozzle
reaction safety valve, __________.

Choice A
Choice B
lower the nozzle ring raise the blow down
ring

Choice C
lower the adjusting
ring

Choice D
raise the blow down
ring and then lower
the nozzle ring
tighten the
compression screw

To increase the popping pressure of the raise the adjusting
safety valve shown in the illustration,
ring
__________.
To make temporary emergency repairs Plastic refractory
to brickwork in a boiler furnace, which
of the materials listed should be used?

lower the adjusting
ring

loosen the
compression screw

Air setting mortar

Insulating block

To minimize axial thrust in an impulse
turbine, equalizing holes are located
__________.

between the steam
inlet and the front of
the dummy piston

between the exhaust in each casing
outlet and the front of diaphragm
the dummy piston

in each rotor wheel

To minimize metal corrosion, boiler
water is best kept __________.
To obtain the best mixing of air and fuel
with a fuel oil atomizer, you need to
adjust the __________.

fairly acidic

slightly acidic

neutral

alkaline

atomizer position
using the distance
piece

diffuser to the
desired flow

primary and
total air volume
secondary air cones admitted to the boiler
for desired air flow
furnace

To prevent a small plastic refractory
wall patch repair from falling into the
furnace of a D-type boiler, you should
__________.
To prevent damage to the turning gear
mechanism, which of the following
procedures must be carried out before
the turning gear is engaged?

attach anchor bolts reinforce the patch
mix the plastic with
to the furnace casing with fine mesh metal concrete prior to
screen
using

To prevent pulsations from developing
in the boiler feed water lines, the
discharge side of a reciprocating feed
pump is equipped with a/an
__________.
To prevent safety valves from lifting
when a boiler is being hydrostatically
tested, you should __________.

The brake on the
first reduction worm
shaft must be set.

undercut the existing
brick around the area
to be patched

The engine order
The speed of the
telegraph must be on astern turbine must
'stop'.
be reduced.

relief valve

reed valve

tie down the hand
lifting gear

decrease the valve
spring pressure

install gags on the
valves

156

SG-0018

Calcined
diatomaceous earth

The propeller shaft
must be stopped and
held stationary until
the clutch is
engaged.
feed water regulator air chamber

increase the valve
spring pressure

Illustration

SP091813

ABS

VER

252401

1

257401

2

257403

1

269504

1

254416

2

262604

1

257202

1

257200

2

258400

2

269702

6

Steam Plants

Question
To properly blow down a boiler gage
glass, you should __________.

Choice A
Choice B
blow through the top blow through the
(steam) connection bottom (water)
first
connection first

Choice C
never disconnect the
chains that connect
the upper and lower
cut out valves

To properly clean a burner tip, you
should use __________.
To properly remove the burner tip nut
from the burner barrel, the barrel should
be __________.
To properly sound a reserve feed water
tank, you should use a/an__________.

light sand blast grit

a soft metal tool

a jack knife

Choice D
take up snugly on
upper and lower
gage glass packing
nuts prior to blowing
down
a wire brush

clamped in a
machinist's vice on
the work bench
innage sounding
tape

fixed in the burner
stowage rack

held by the fixture on
the burner cleaning
bench
manila line with an
attached weight

removed from the
gooseneck before
removing the tip nut
fuel oil settler ullage
tape

To provide emergency feed water
supply to a steaming boiler, if it
becomes necessary to secure the DC
heater, suction should be taken on the
distilled water tank using the
__________.
To raise vacuum on the main turbine
unit, you should __________.

emergency injector
discharge

emergency feed
pump

feed booster pump

main condensate
pump

chalk coated
calibrated metal rod

start the lube oil
pump after starting
the jacking gear
To safely decrease the boiler firing rate, after reducing the
you should always reduce the fuel
forced draft pressure
pressure __________.
To safely increase the firing rate of a
before increasing the
boiler, you should always increase the fuel pressure
forced draft pressure __________.

warm up and drain
pump the main
the main steam lines condenser hot well
dry
before reducing the by opening the oil
forced draft pressure recirculating valve
after increasing the
fuel pressure

To safely reduce a high water level in a use the bottom blow use the surface blow
steaming boiler, you should
__________.
To stop the rotor of a main turbine while apply the prony
tighten the stern tube
underway at sea you should
brake
packing gland
__________.

157

Illustration

admit gland sealing
steam to the turbine
glands
by opening the fuel
pump relief valve

by opening the
by opening additional
burner register wider burner registers

secure the boiler
fires

open the
superheater drain

secure all steam to
the turbine

admit astern steam
to the turbine after
securing the ahead
steam

SP091813

ABS

VER

265204

1

265204

2

258204

3

259320

1

252001

1

Steam Plants

Question
To test an automatic low lube oil
pressure trip on an idling turbo
generator and at the same time prevent
the chance of bearing damage, you
should __________.

Choice A
actuate the over
speed trip, making a
note at what
pressure the oil is
dumped from under
the operating piston

To test an automatic low lube oil
pressure trip on an idling turbo
generator and at the same time prevent
the chance of bearing damage, you
should __________.

secure the steam
supply valve to the
throttle valve and
observe the lube oil
pressure reading
when the throttle
trips, while ensuring
an adequate supply
of oil with the hand
or standby pump as
the generator idles to
a stop or drops
below 3 psi
a white burner flame a clear stack

Too much excess air in a steaming
boiler may be indicated by __________.

Choice B
close the generator
steam throttle valve
and then ensure a
supply of oil through
the hand or standby
pump when the
pressure drops to 56 psi

Choice C
secure the steam
supply valve to the
throttle valve and
observe the oil
pressure as the
throttle trips during
the slowdown and
ensure a supply of oil
with the hand or
standby pump when
the pressure drops to
2-3 psi
ensure the standby close the generator
lube oil pump, if so steam throttle valve
equipped, is properly and then ensure a
lined up and set in
supply of oil through
the "auto" mode, or the hand or standby
the hand pump is
pump when the
being operated and pressure drops to 5then actuate the
6 psi
emergency trip

Treatment of boiler feed water for the
excessive feed water foaming
control of hardness is necessary to
alkalinity
prevent __________.
Tubes may be seal welded into fittings 0.35%
0.40%
or headers of boilers and superheaters
after they have been expanded and
flared, provided the material in the fitting
or header does not contain carbon in
excess of __________.

158

Illustration
Choice D
ensure the standby
lube oil pump, if so
equipped, is properly
lined up and set in
the 'auto' mode, or
the hand pump is
being operated and
then actuate the
emergency trip

actuate the over
speed trip, making a
note at what
pressure the oil is
dumped from under
the operating piston

white smoke

all of the above

carryover

waterside scale
deposits

0.45%

0.50%

SP091813

ABS

VER

264600

1

260401

1

267205

1

266001

1

253504

3

256809

3

258802

2

253303

1

250101

8

254504

1

Steam Plants

Question
Turbine blade erosion is accelerated by
__________.
Turbine casing flanges are sometimes
provided with a system of joint grooving
to __________.

Choice A
high blade speed

Choice B
high moisture
content
form a labyrinth seal ensure perfect
between the casing alignment of casing
halves
halves

Choice C
high vacuum

Choice D
all of the above

Two-element feed water regulators
operate by sensing __________.
Ultraviolet light sensing flame scanners
installed on an automated main
propulsion boiler, are designed so they
__________.

boiler water level and
steam flow
might be misled by
glowing brickwork

feed water flow and
steam pressure
cannot be used with
steam atomizing
burners

Under constant boiler load, the
superheated steam temperature may
rise above normal for the existing load if
__________.
Under EMERGENCY operating
conditions, the proper valve positions
for controlling feed water to the boiler
should be the __________.

excess air is too low feed water
temperature is too
low

boiler water level and
feed water flow
are sensitive only to
the center of the
ultraviolet portion of
the flame from a
particular burner
boiler water level is
too high

auxiliary stop-check
valve fully open and
the auxiliary stop
valve regulated by
the feed water
regulator
Auxiliary exhaust
steam

Illustration

increase contact
pressure between
the casing halves'
flanges
Turbine lube oil suction strainer baskets coarse perforations fine perforations
frame lined with wire self-cleaning design
have __________.
cloth
Turbine throttling losses can best be
as a result of friction whenever there is
as a result of fluid
as steam passes
described as a loss of energy occurring created when steam leakage of steam
friction caused by
through the steam
__________.
passes through the from one stage to
frequently throttling admission valve and
nozzle block
another through the the turbine wheel
there is a drop in
throttle valve packing and blade speed
pressure without the
gland
performance of work

Under normal conditions, steam to the
DC heater is supplied directly from
which of the systems listed?
Under normal conditions, the rate of
heat transfer in a feed water heater is
most greatly affected by the
__________.

boiler water level and
steam pressure
will be sensitive to
the outer portion of
flames

inject sealing
compound between
the casing halves

combustion air is
excessively hot

auxiliary stop-check
valve fully open and
the auxiliary stop
valve used to
regulate the amount
of flow
Main steam

auxiliary stop valve
fully open and the
auxiliary stop-check
valve used to
regulate the amount
of flow
600 psi auxiliary
steam

auxiliary stop and
stop-check valves
fully open and the
feed pump speed
used to regulate the
amount of flow
150 psi auxiliary
steam

temperature
differential between
the steam and feed
water

density of the feed
water

pH of the feed water speed of the main
feed pump

159

SP091813

ABS

VER

258808

4

258808

8

258205

258808

258808

258808

258808

2

7

5

1

6

258804

1

251203

4

Steam Plants

Question
Under normal firing rates, a reduction of
the steam outlet temperature from an
uncontrolled superheater could be
caused by __________.
Under normal firing rates, which of the
conditions listed could result in a low
superheater outlet temperature?
Under normal operating conditions of
constant load and combustion rates,
which of the following will occur when
the amount of excess air to the furnace
is increased?
Under normal operating conditions, a
drop in the steam temperature at the
outlet of an interdeck superheater could
be caused by a decrease in
__________.
Under normal operating conditions, a
drop in the steam temperature leaving
an interdeck-type superheater can be
caused by a decrease in the velocity of
the __________.
Under normal operating conditions, a
drop in the steam temperature leaving
an uncontrolled interdeck superheater
could be caused by a __________.
Under otherwise normal operating
conditions, a drop in the steam
temperature leaving an uncontrolled
interdeck-type superheater could be
caused by a/an __________.
Under otherwise normal steaming
conditions, an abnormally high
temperature at the superheater outlet of
a single furnace boiler would indicate
__________.
Under steady steaming conditions, the
superheater outlet temperature is
regulated by the __________.

Choice A
high feed water
temperature

Choice B
Choice C
too much excess air dirty generating
tubes

Choice D
fouled economizer
tubes

High feed water
temperature

Too much excess air Dirty generating
tubes

Fouled economizer
tubes

The superheater inlet The rate of heat
temperature will
transfer will
decrease.
decrease.

The superheater inlet The superheater
temperature will
outlet temperature
increase.
will increase.

steam velocity
through the
superheater

the feed water
temperature

combustion gas
velocity through the
superheater

the pressure
differential across
the fuel oil strainers

combustion gas
flowing around the
superheater tubes

steam flowing
through the
superheater tubes

steam flowing
through the
desuperheater

steam entering the
dry pipe

decrease in
combustion gas
velocity through the
superheater
increase in
combustion gas
velocity through the
superheater

decrease in steam
velocity through the
superheater

drop in the feed
water temperature

badly fouled
economizer

decrease in steam
velocity through the
superheater

increase in feed
water temperature

badly fouled
economizer

poor heat transfer in high steam demand
feed water heaters

insufficient
combustion air

excessive steam
supply to fuel oil
heaters

integral superheater control
desuperheater

auxiliary
desuperheater

radiant superheater

160

Illustration

SP091813

ABS

VER

250724

7

269935

269853

269852

269852

269504

2

3

4

2

2

Steam Plants

Question
Under what operating conditions may
water wall header drains be used for
blow down?

Choice A
Only if the fires are
secured and no
steam is being
generated.
Underway on watch in the fire room, the fuel oil temperature
bridge reports black smoke coming
too low
from the stack. This would indicate
__________.
Upon assuming the watch on a steam Incorrect line-up of
ship while cargo operations are in
lube oil service pump
progress with the main engine and
bypass system.
reduction gear secured, you notice a
very large increase in the reduction
gear lube oil sump level from previous
log book entries. What would be the
most probable cause of this large
increase in sump level?
Upon taking over the watch and the
Verify that the main
vessel is operating at sea speed, you
and auxiliary
find the D.C. heater water level to be
condenser hot well
dropping very slowly. Which of the
levels are normal.
following would you check to monitor
this condition?
Upon taking over the watch, while the
Excessive
vessel is at sea speed, you find the
recirculation of
following conditions to exist. Which
condensate. Failure
condition should be attended to first and to properly adjust
why should this step be taken?
may cause an
increase in
condenser level
leading to a
decrease in
condenser vacuum.
Using a dry uncoated sounding rod or
always be 100%
tape to measure the depth of water in a accurate
reserve feed water tank will
__________.

Choice B
During periods of
carryover in the
steam drum.

Illustration
Choice C
Choice D
When the water level When it is necessary
is out of sight in the for rapid drainage of
gage glass.
the boiler.

excessive steam
excessive air-fuel
atomization pressure turbulence

A slight change in
the vessel's trim.

All of the above

Lube oil gravity tank All of the above are
is empty.
correct.

Verify that the boiler Verify the DC heater All of the above.
water levels are not spill valve is not
slowly increasing.
partially opened.

Salted up evaporator
dumping to bilge.
Must immediately be
restarted to prevent
insufficient quantities
of distilled and
potable water.

High level in fuel oil
sludge tank.
Necessary to pump
contents to settler to
prevent overflow of
tank into the bilges.

thoroughly
be very inaccurate
contaminate the feed
water

161

Leaking air line to
auxiliary exhaust live
steam makeup valve
actuator. Repair or
place in bypass
control to insure
proper pressures in
the auxiliary exhaust
steam system.
be satisfactory if a
small amount of oil is
floating on the
surface

SP091813

ABS

VER

256327

1

256600

1

255002

1

254411

1

264603

2

258600

2

252810

1

254119

1

254119

2

268410

1

264600

5

250061

5

Steam Plants

Question
Using an oil temperature-viscosity chart,
you can determine the recommended
__________.
Valve "H" shown in the illustration,
functions to __________.

Choice A
Choice B
Choice C
fuel oil flash point for fuel/air ratio for
oil temperature for
best combustion
efficient combustion proper atomization

regulate the amount provide a quick shut
of fuel burned
off of fuel to the
boiler
Vapor blowing from the air ejector
insufficient
excess makeup feed
condenser vent may be caused by
condensate flow
being taken into the
__________.
system
Vent condensers are usually an integral only steam vented
steam vented from
part of deaerating feed heaters and
from high pressure high pressure steam
serve to condense __________.
steam traps
glands
Vibration in main propulsion turbines
could be caused by __________.

uneven heating of
the rotors

Vibration or panting of a boiler can be
caused by __________.
Warping of superheater screen tubes
can be caused by __________.

insufficient air
high superheater
temperatures

prevent a backflow
from the manifold

recirculate fuel oil
during start-up

low condensate
temperature

excessive
condensate pump
speed
the gases liberated
by the deaeration
process

the steam vapor
entrained with the
non-condensable
gases
high pressure steam high vacuum in the
in the first-stage
main condenser
poor mixing of air
and oil
high furnace
temperatures

Illustration
Choice D
oil pressure for
smokeless operation

excessive fuel oil
temperature
installing baffles of
excessive length

SG-0009

thrust developed in
the turbines
all of the above

sudden cooling of
tubes after being
overheated
liberate air pockets assure positive flow prevent vapor
and reduce
to the lube oil coolers binding of the
waterside oxidation
circulating pump
liberate air pockets provide a minimum prevent vapor
and reduce
condensate level in binding of the
waterside oxidation the hot well
circulating pump
steam sealed turbine vents on tanks and all of the above
glands
gear casings

Water boxes on condensers are vented prevent excessive
to __________.
pressure on tube
sheets
Water boxes on main condensers are prevent excessive
vented to __________.
pressure on tube
sheets
Water can enter the lube oil system of a leaky tubes in
main propulsion turbine unit from
secured lube oil
__________.
coolers
Water carryover in the steam entering a excessive rotor shaft blade erosion
turbine could result in __________.
wear
Water circulates in a natural circulation difference in tube
angle of inclination
boiler due to the __________.
length and diameter

162

turbine over speed

fracturing of the
carbon packing
difference in density difference between
between the water
the heights of the
and the steam/water boiler drums
mixture

SP091813

ABS

VER

250061

2

250061

9

Question
Water circulates within a natural
circulation boiler as a result of the
__________.
Water circulation in a water-tube boiler
is a result of the __________.

250061

10

Water circulation in a water-tube boiler
is a result of the __________.

5

Water contamination in the main
propulsion lube oil system is
undesirable because __________.

268414

258901

2

258901

1

267826

3

267384

2

269081

1

252806

1

252806

2

Steam Plants

Choice A
Choice B
difference in the tube angle of tube
length and diameter inclination

Choice C
differences in density
within the circulating
medium
difference between differences in density velocity added to the
the area and length within the circulated water by the feed
of the water-tubes
water
pump
difference between differences in water velocity added to the
the area and length density in boiler
water by the feed
of the water-tubes
tubes
pump
the flash point of the water causes oil to
emulsification occurs
lube oil is raised to a clog in journal
with resultant loss of
dangerously high
bearings
lubricating qualities
level

Choice D
difference between
the heights of the
boiler drums
siphon action of
steam leaving the
drum
siphon action of
steam leaving the
drum
it reduces oil cooler
effectiveness

Water emulsified in the fuel oil when
sputtering of the fires lower than normal
excessive white
all of the above
supplied to a boiler is indicated by
fuel oil pressure
smoke
__________.
Water in the fuel supply to a steaming observation of the
sputtering of the fires panting of the casing dense white smoke
boiler can be detected by __________. fuel oil heater drains
being observed in
the periscope
Water is best removed from lubricating silica gel cartridges pressure filters
paper edge filters
centrifuging
oil by __________.
Water removed through centrifugal
K
N
V
X
force in the illustrated unit is displaced
from the bowl through __________.
Water retained in the lube oil system of causes pitting of the causes the turbine to raises the flash point
a main propulsion turbine installation is gear teeth
over speed
of the oil to a
undesirable because it __________.
dangerously high
level
Waterside abrasion of boiler tubes can entrained impurities improper bends in
oxygen corrosion
be caused by __________.
in the boiler water
the tubes
Waterside grooving is usually very
detection and
it occurs only on the it usually occurs in
difficult to locate in a boiler tube before confirmation of this interior surfaces of
the tube bends near
leakage occurs because __________. type of corrosion
desuperheater tubes the water drum
requires laboratory
examination

163

Illustration

GS-0124

results in excessive
cooling of bearing
surfaces
mechanical tube
cleaning
it occurs in narrow
bands along the top
of horizontal floor
tubes exposed to the
products of
combustion

SP091813

ABS

VER

250701

7

251200

9

254801

1

259283

259245

1

1

259060

3

257806

1

261009

1

Steam Plants

Question
Water-tube boiler screen tubes protect
which of the listed components from
high furnace temperatures?

Choice A
Saturated steam
tube bank

Choice B
Superheater tube
bank

Water-tube boilers having integral
uncontrolled superheaters are equipped
with internal desuperheaters to
__________.
What affect will the emergency plugging
of leaking condenser tubes have on the
condenser pressure and hot well
temperature when returning to normal
steam plant sea speed operation?

lower the
temperature of bleed
steam in a reheat
type plant
Absolute pressure
and hot well
temperature will
increase

add moisture to
superheated steam

lower superheated
steam pressure for
use in auxiliary
machinery
Absolute pressure
Absolute pressure
will decrease and hot will increase and hot
well temperature will well temperature will
increase
decrease

provide
desuperheated
steam for auxiliary
machinery
Absolute pressure
and hot well
temperature will
decrease

What are the two most common gases
that dissolve in boiler water and cause
corrosion on the internal parts of the
boiler?
What boiler water chemistry is
necessary to ensure the precipitation of
hard scale forming calcium?

Oxygen and carbon
dioxide

Oxygen and carbon
monoxide

Oxygen and
ammonia

Oxygen and nitrogen

Hydrazine
concentrations
should be at the
proper level.
What boiler water test would be given to alkalinity test
insure that the boiler water contains
sufficient chemicals to transform hard
scale forming salts into harmless sludge
which would eventually be removed with
blow downs?

Boiler water
hardness should be
high.

Boiler water should
be slightly acidic.

Boiler water should
have a reserve of
phosphates.

phosphate test

chloride test

hydrazine test

What causes carbon to adhere to the
inside surfaces of a fuel oil heater?
What happens to the steam as it moves
across the moving blades in a reaction
turbine?

Deteriorated zinc
strips
It creates an axial
thrust in the direction
of the steam flow.

Excessive fuel oil
temperature
It loses velocity at
constant pressure.

Vanadium in the fuel

Too much carbon in
the fuel
It gains velocity at
constant pressure.

164

Choice C
Water drum

Choice D
Refractory

Illustration

It creates an axial
thrust opposing the
direction of steam
flow.

SP091813

ABS

VER

269702

5

260203

256334

261800

3

1

3

Question
Choice A
What immediate action should you take Immediately increase
if you are on watch and note 'zero' lube cooling water flow to
oil pressure for the operating main
lube oil cooler.
turbine?

Choice B
Choice C
Slow the turbine to
Stop the shafts.
minimum speed and
watch the bearing
temperatures.

Choice D
Shift strainers and
gravity tanks.

What is generally found at the end of
Cruising turbine
the low pressure turbine rotor of a crosscompound turbine arrangement?

High pressure
turbine

Astern turbine

What is indicated by the code number
32Y20 stamped on a burner sprayer
plate?

Sprayer plate orifice Sprayer plate
area is 0.32 square requires a size 20
inch.
tip.

What is normally used to compensate
for thermal expansion and contraction
of the main turbine casing?

Flexible I-beam
supports

1

1

What is the cause of 'laning' in a boiler
tube bank?

Insufficient airflow

252819

2

What is the cause of 'laning' in a boiler
tube bank?

Insufficient airflow

252819

What is the FIRST thing that will
happen if both the main and standby
lube oil pumps fail on a geared main
propulsion turbine operating at full sea
speed?
What is the function of valve "H" of the
system shown in the illustration?

1

256600

2

255700

2

Steam Plants

Sprayer plate orifice Sprayer plate
was made with a
requires a minimum
size 32 drill.
of 20 psi fuel
pressure.
Curved steam lines Babbitt lined
bearings

What is the advantage of a forced water The circulating pump Boiler tubes are less A steam accumulator All of the above.
circulation boiler over a natural
need not operate
likely to overheat.
is not required.
circulation boiler?
when low pressure
steam is required.

250065

267220

Rigid mountings

Back pressure
turbine

Illustration

What is the main constituent in fuel oil
which determines its heat value?

Reduced furnace
volume

Ahead throttle will
close.

Excessive slag
Low fuel oil pressure
accumulation on the
tubes
Slag accumulation
Low fuel oil pressure
forming between the
tubes
Lube oil sump will
Vacuum will be lost.
overflow.

To regulate the
amount of fuel
burned.
Hydrocarbons

To prevent fuel
backflow from the
manifold.
Oxygen

To provide for quick
fuel shut off.

To recirculate fuel
when lighting off.

Nitrogen

Sulphur

165

High fuel oil
temperature
HP turbine bearings
will overheat.

SG-0009

SP091813

ABS

VER

252101

2

251306

2

259324

1

256363

1

256600

3

268905

2

261020

1

256309

2

250034

2

Steam Plants

Illustration
Choice C
Choice D
Provide a steady
Protect the
supply of water to the superheater tubes
water drum.
from the radiant heat
of the flames in the
furnace.
What is the primary operational
The principle by
The manner in which The difference in
The manner in which
difference between a nozzle reaction
which blow down is steam pressure
valve relieving
lifting pressure is
safety valve and a huddling chamber
accomplished.
causes initial valve
capacities.
adjusted.
safety valve?
opening.
What is the purpose of chemically
To reduce formation To reduce to a
To reduce foaming All of the above.
treating boiler water?
of scale on the
minimum corrosion and moisture
waterside of the
of boiler metal.
carryover.
boiler.
What is the purpose of the movable air Regulate the
Function to open and Maintain airflow
Support the burner
doors in an air register?
temperature of air
close the register.
across the forced
distance piece.
entering the furnace.
draft fan.
Question
Choice A
Choice B
What is the primary function of the
Generate the major Increase the
water screen tubes in a "D" type marine portion of the steam temperature of the
boiler?
in the boiler.
generating tube
bank.

What is the quickest way to shutoff the
boiler fuel oil supply from inside the fire
room?
What is the significance of pinion
deflection in the operation of reduction
gears?

Closing the settling
tank suction valves.

Trip the quickclosing fuel valve.

Close the double
bottom suction
valves.
Pinion deflection
Deflection is minimal Deflection causes
causes unequal
because a longer
excessive wear at
tooth loading.
pinion is more rigid. the center of the
pinion.
What is used to compensate for the
The decreased
Tuned vibration
Securing the blade
increased possibility of blade vibration pressure drop across dampers.
tips with shrouding.
occurring with impulse turbine blading? the blade due to the
thin tip design.

Open the oil
recirculating valves.

What percentage of CO2 in a boiler flue
gas analysis would indicate perfect
combustion?
What physical changes will occur to the
steam within a boiler that has been
properly bottled up when additional heat
is applied?

0%

3%

6%

12%

The steam pressure
and it specific
volume will remain
constant.

The pressure will
increase and the
volume will remain
constant.

The pressure will
remain constant and
the specific volume
will increase.

The pressure will
increase and the
specific volume will
decrease.

166

Deflection causes
excessive wear at
both ends of the
pinion.
Seal stripping the
groove within the
turbine casing.

SP091813

ABS

VER

268200

3

264603

4

269854

2

269854

269854

3

1

250305

1

250601

2

267209

1

254301

4

Steam Plants

Question
What should be done when foreign
matter is found in a lube oil strainer?

Choice A
Choice B
Choice C
Choice D
Immediately stop the Examine the foreign Periodically open the All of the above.
main engine and
matter and
drain valve to the
inspect all strainers. determine its source. sludge tank.

What should you do if you detect an
abnormal vibration in the operating
main propulsion turbine?
What steps should be taken if
excessive steaming and vigorous
bubbling occurs in the first section of
the drain inspection tank?

Notify the chief
engineer and stand
by the throttles.
Systematically locate
and isolate the faulty
traps in the main
steam piping to the
turbo generator.

Immediately slow the
turbine until the
vibration ceases.
Locate and secure
any unnecessarily
opened steam trap
bypass valve.

Immediately stop the Open the turbine
turbine.
drains until the
vibration ceases.
Secure the fuel oil
All of the above are
heater currently in
correct and each
use.
step should be taken
promptly.

What steps should be taken if
excessive steaming and vigorous
bubbling occurs in the first section of
the drain inspection tank?

Secure the fuel oil
heater currently in
use.

Locate and open any
unnecessarily closed
steam trap bypass
valves.

Systematically locate
and isolate any faulty
traps in the
contaminated steam
system piping.

What steps should be taken if large
quantities of fuel oil are found in the
drain inspection tank?

Change over to the
standby fuel oil
heater.

Open steam trap
Secure the lube oil
bypass of the fuel oil purifier and its
heater that is on line. associated heater.

All of the above

What type of boiler is shown in the
illustration?

A down fired two
furnace boiler with a
vertical superheater,
economizer,
waterwalls and
downcomers.

A Scotch boiler with
a horizontal
superheater,
economizer,
waterwalls and
downcomers.

A sectional header
boiler with a
superheater,
economizer, and
water walls and
downcomers.

Overdeck convection Vertical U-tube
tube
Self venting
Shell-and-tube

A two drum, single
furnace, D type
boiler with an
interdeck
superheater, an
economizer, water
walls and
downcomers.
Overdeck integral
tube
Bundle and stack

Thermostatic

Continuity

Preset electric timing
sensor

What type of boiler superheater is
shown in the illustration?
What type of lube oil cooler is shown in
the illustration?
What type of sensor is normally used
with the automatic recirculating valve in
the main condensate line?

Pressure

167

Illustration

All of the above are
correct and should
be performed in the
order as shown.

Horizontal U-tube
Plate type

SG-0008

SG-0008
GS-0122

SP091813

ABS

VER

267203

2

254113

267220

257808

269855

3

2

3

1

269855

2

259778

2

258650

2

Steam Plants

Question
What type of strainer is used in a
turbine lube oil system to remove
metallic particles?
What unit, or factor creates most of the
vacuum within a tight and adequately
cooled main condenser once the main
engine is in operation?

Choice A
Magnetic basket
strainer

Choice B
Simplex filter

Choice C
Metal edge strainer

Choice D
Fuller's earth filter

Main condensate
pump

Main air ejector

Condensation of
turbine exhaust
steam

What will be the FIRST thing to occur if
both the main and standby lube oil
pumps failed to operate on a geared
main propulsion steam turbine
operating at full sea speed?
What will occur if the fuel oil heater
condensate returns are not opened or
are partially plugged?

Ahead throttle will
close.

Lube oil sump will
overflow.

Vacuum will be lost.

Counter flow of
seawater over the
surface of the tubes
with the flow of
exhaust steam in the
tubes
Shaft brake will
engage.

Fuel will become
overheated.

Fuel consumption
will decrease.

Fuel may not be
Fuel pump slippage
heated sufficiently for will result.
proper combustion.

What will occur if the level of the
atmospheric drain tank (fresh water
collector) is permitted to continuously
decrease while the vessel is underway?

The amount of
condensate pumped
to the contaminated
evaporator will
decrease.

The pressure of the
contaminated steam
system will drop
once the tank is
empty.

Make-up water will
There is a possibility
be automatically
of loosing vacuum in
added to the tank via the main condenser.
a vacuum drag
arrangement.

What will occur if the level of the
atmospheric drain tank, (fresh water
drain collector) is permitted to
continuously rise while the vessel is
underway?
When a boiler economizer is fitted with
a valve bypass, Coast Guard
Regulations (46 CFR) require which of
the following devices to be installed?

The tank will
overflow causing a
significant loss of
potable water.

When a boiler flareback occurs, you
should __________.

reduce the forced
draft blower speed

The pressure of the
contaminated steam
system will rise when
the tank becomes
full.
A sentinel valve is to A stop check valve is
be fitted on the
to be located at the
superheater outlet. economizer outlet.

There is a definite
possibility of the tank
overflowing, causing
loss of distilled
water.
A stop check valve is
to be located at the
economizer inlet.

Illustration

There will be an
increase of vacuum
in the main
condenser within a
short period of time.
An emergency drain
line must be
provided to the
reserve feed tank.

close the master fuel take the boiler off the increase the fuel oil
oil valve
line
supply pressure

168

SP091813

ABS

VER

257003

1

257110

2

259220

1

262001

268401

250062

252200

1

5

2

2

Steam Plants

Question
When a boiler has been secured and is
being initially cooled, the water level
showing in the steam drum gage glass
should be __________.
When a boiler is up to pressure and is
being placed on the line, you should
secure the __________.
When a boiler water test indicates a pH
value of 6, you should __________.

Choice A
allowed to drop
naturally

Choice B
maintained at the
normal level

Choice C
maintained at a full
glass

Choice D
allowed to go out of
sight

air cock

economizer drain

superheater vent

air heater vent

begin a continuous
boiler blow down

chemically treat to
lower the pH to
normal level
main condenser

chemically treat to
raise the pH to
normal level
auxiliary exhaust
system

check the DC heater
for possible
malfunction
When a high pressure turbine is
gland exhaust
operating at sea speed, the pressure of condenser
the steam leaking through the shaft
gland packing may be slightly higher
than the pressure setting of the gland
seal regulator. In this situation, the
excess steam at the regulator is
directed to the __________.
When a lube oil purifier has been
cleaned, but a small amount of sludge
remains in one spot of the bowl side,
the __________.
When a mixture of steam and water in a
boiler has reached the point at which
NO further change in state can occur
with the addition of heat, the mixture is
considered to have reached its
__________.
When a propulsion boiler is removed
from service for an extended period,
why should the firesides be thoroughly
dried after water washing?

excess steam
condenser

seal will be gradually through put will be
lost after being
reduced
placed into operation
supercritical end
point

critical end point

Reduce the
probability of
corrosion.

Prevent flarebacks
on lighting off.

169

Illustration

temperature of the oil dirty oil pump
input will have to be discharge pressure
lowered
will need to be
increased
vaporization end
saturation end point
point

Prevent cracking of
the brickwork.

Reduce the
possibility of thermal
spalling.

SP091813

ABS

VER

266007

1

253002

1

268108

1

269700

1

261225

1

262403

1

259005

2

250502

5

269924

3

Steam Plants

Question
When a reference input signal from the
bridge to the engine room takes place,
the signal is inverted in the amplifiers
and function generators. A negative
signal from the amplifier, shown in the
illustration, labeled "M", will result in a
__________.
When a soot fire occurs, damage to an
economizer can be minimized if you
__________.

Illustration
Choice A
Choice B
Choice C
Choice D
positive signal to the negative signal to the positive signal to the negative signal to the
ahead hydraulic
ahead hydraulic
astern hydraulic
astern hydraulic
actuator pilot motor actuator pilot motor actuator pilot motor actuator pilot motor
SE-0002

maintain feed water
flow through the
economizer while
extinguishing the fire

secure the
economizer and
open the drain valve
to prevent steam
pressure buildup
loss of oil flow across clogged lube oil
one of the bearings pump suction

When a sudden increase in pressure
occurs in a forced lubrication system,
you should check for a __________.
When a turbine bearing shows signs of stop the turbine
overheating, you should __________.

immediately reduce
speed

increase the forced
draft fan speed to
blow out the fire

secure the fires and
inject CO2 into the
furnace

ruptured tube in the
lube oil cooler

high lube oil sump
level

increase the lube oil increase the cooling
pump discharge
water supply to the
pressure
lube oil cooler

When a turbine is in operation, a rotor
position micrometer is used to
determine any change in rotor
__________.
When a turbine rotor is not rotating
during maneuvering, the heat tends to
be concentrated at the __________.
When a vessel is in port and the boiler
automation system continually trips the
burner fuel oil solenoid valve, you
should __________.

radial position
radial position
relative to the casing relative to the
micrometer

axial position relative axial position relative
to the casing
to the micrometer

turbine bleed lines

exhaust trunk

top of the turbine

wedge the valve in
the open position
and report it to the
chief engineer

bypass the solenoid
valve and enter the
fact in the logbook

When a vessel is in port, stack type air
heaters are bypassed in order to
prevent __________.

insufficient air supply corrosion of the
to the fires due to the heater due to low
pressure drop across stack temperatures
the heater

change the burner
wedge the valve in
and check the flame the open position
safeguard system
and reduce the fuel
oil pressure at that
burner
excessive back
localized heat
pressure in the
stressing of air
furnace due to low
heater surfaces
flow rates

When air becomes trapped in the
rudder will respond
hydraulic fluid of a steering system, the erratically
__________.

hydraulic ram
movement will over
speed

170

casing joints

sight glass will show ram relief valves will
bubbles
lift

SP091813

ABS

VER

267832

1

258806

1

258901

5

256316

252300

254101

259747

1

1

1

11

Steam Plants

Question
When an oil purification centrifuge loses
a portion of its seal, the oil can then be
discharged through the heavy phase
discharge port. This is partly a result of
greater __________.
When answering a full astern bell from
half ahead, the superheater outlet
temperature on a single furnace boiler
will __________.

Choice A
centrifugal force
being developed on
the oil near the
interface

Choice B
centripetal force
being developed on
the oil near the
interface

Choice C
centrifugal force
being developed on
the water seal at the
side of the bowl

Choice D
centripetal force
being developed on
the water seal at the
side of the bowl

increase sharply with decrease due to the decrease
the increased firing increase steam
momentarily and
rate
volume used
then increase
proportionately with
load demand
When boiler fires begin sputtering,
start the alternate
shift to the service
change suction to
indicating water in the fuel oil settling
fuel oil service pump pump low suction
the alternate settling
tank, you should __________.
tank
When burning fuel oil in a boiler, a high more heat is
less excess air is
efficient combustion
CO2 content is desired in the stack gas liberated by the
required to produce is indicated even
because __________.
production of CO2
CO2 than CO
though the heat
than CO
liberated is less than
the heat produced by
burning to CO

remain the same

When cleaning the waterside of boiler
tubes with a powered rotary brush, the
brush should kept in motion to
__________.
When condenser tube ends are rolled
into both tube sheets, the different rates
of material expansion are compensated
for by utilizing __________.

reduce the fuel pump
operating speed
efficient combustion
is indicated and the
heat liberated is
equal to the heat
produced by the
formation of CO

avoid internal tube
damage

prevent it from
seizing

reduce tube pitting

reduce wear to brush
bristles

belled joints at both
tube ends

threaded brass
ferrules on the tube
ends

expansion joints in
the condenser shell

metallic packing
pressed around the
tube ends

removing the safety
valves in order to
perform the
hydrostatic test

a test pressure of
less than 1 1/2 times
the maximum
allowable working
pressure if testing a
water-tube boiler

the auxiliary stop
valve from
simultaneously
having hydrostatic
pressure on one side
of the valve and
steam pressure on
the other side

When conducting a periodic hydrostatic gagging the safeties
test of a boiler, Coast Guard
Regulations (46 CFR Part 61) prohibit
__________.

171

Illustration

SP091813

ABS

VER

251700

3

251605

1

251307

1

256804

1

260605

2

256700

1

250406

2

255701

1

Steam Plants

Question
Choice A
Choice B
Choice C
When conducting a routine hydrostatic raise the
apply hydrostatic
have gags installed
test on a water-tube boiler, you should temperature of the
pressure equal to the on all safety valves
__________.
boiler water to 180°F maximum allowable
working pressure of
the boiler

Choice D
bypass the
economizer

When drying and baking are
impractical, or time is not available,
which of the listed materials could be
used to repair both burner openings and
gas baffles?
When excessive static boiler pressure
has resulted in the initial lift of the valve
disc, a huddling chamber safety valve
will continue to lift open as a result of
___________,
When firing a boiler in local manual
control, an increase in boiler load must
be accompanied by a/an __________.

Baffle mix

Plastic chrome ore

Plastic fire clay

High temperature
castable refractory

steam pressure
acting on the
enlarged area of
projecting lip or ring

the resulting reactive an increase in steam
force created by the velocity through an
rapid expansion of
adjustable orifice ring
escaping steam

Illustration

steam pressure
transmitted through a
pipe connected to
the superheater
outlet
increase in the fuel decrease in the
increase in the
increase or a
oil flow before an
forced draft air
forced draft air
decrease in the fuel
increase in the
pressure before a
pressure before an oil flow and forced
forced draft pressure decrease in the fuel increase in the fuel draft air pressure
oil flow
oil flow
simultaneously
When fitting new carbon ring packing
reduce the ring
reduce the clearance reduce the possibility provide for a greater
on a turbine rotor shaft, carefully filing
segment end
between the
of scoring the shaft oil wedge pressure
the ends of the segments will ______. clearance
assembled ring
segments and shaft
When forced draft blowers are provided keep the forced draft permit full
maintain a constant ensure that all
with high and low speed controls, it is
discharge dampers maneuvering
air/fuel ratio
burners will remain
advisable to run the blowers at high
open wide
capability without the
ignited at low load
speed during maneuvering to
necessity of
__________.
changing blower
speed
When heated, brickwork in a boiler is
insulating bricks
sliding saddles
expansion joints
insulating blocks
kept from buckling by the installation of
__________.
When heated, fuel oil will __________. increase in specific have a higher
expand in volume
increase in viscosity
gravity
specific heat

172

SP091813

ABS

VER

255803

3

257200

1

251705

1

250724

2

256804

258802

253301

Choice A
it is necessary to
transfer the fuel

When installing new safety valve
escape piping, precautions should
include assuring that __________.
When is the best time to give a boiler a
bottom blow?

bends or elbows in
the line do not exist

1

251704

254101

Question
When heating heavy fuel oil for use in
main propulsion boilers aboard ship, the
flash point may be exceeded only when
__________.
When increasing the firing rate of a
boiler, which of the following should be
carried out FIRST?
When installed, the economizer relief
valve should always be set
__________.

2

2

1

1

Steam Plants

Choice B
Choice C
the boiler is being
the superheater
fired under maximum temperature has
load
been higher than
normal
Increasing the fuel
Increasing the feed
pressure.
water flow.

Increasing of the
forced draft air
pressure.
at the same pressure at the same pressure 50 pounds higher
as the superheater as the drum safety
than the superheater
safety valve
valve
safety valve plus the
water pressure drop
through the
economizer
no stress is
transmitted to the
valve
Just before placing it Just after placing it
on the line.
on the line.

When main condenser tubes are rolled a bellows tube sheet condenser supports
into both tube sheets, the effects due to
differential expansion rates are
minimized by the use of __________.
When manually firing a main propulsion increase in the fuel
boiler, an increase in boiler load should oil flow before an
be accompanied by a/an _______.
increase in the
forced draft pressure
When operating under constant load,
the superheated steam temperature
may rise above normal if the
__________.
When operating with the auxiliary feed
line, feed water flow is controlled
__________.

Choice D
it is required for
proper atomization

Decreasing the
steam pressure.
50 pounds higher
than the drum safety
valve plus the water
pressure drop
through the
economizer

the quick-closing
the piping leads
valve operates freely directly to the bilge
Just after taking it off When the boiler
the line.
pressure has
dropped to zero.
shell expansion
a brass wearing strip
joints

decrease in the
forced draft air
pressure before a
decrease in the fuel
oil flow
excess air is too low feed water
temperature is too
low

increase in the
forced draft air
pressure before an
increase in the fuel
oil flow
feed water
temperature is too
high

increase or a
decrease in the fuel
oil flow and forced
draft air pressure
simultaneously
boiler is priming

manually by throttling automatically by the
the auxiliary feed
main feed water
stop-check valve
regulator

manually by
adjustment of the
auxiliary feed water
regulator spring
setting

automatically by the
economizer bypass

173

Illustration

SP091813

ABS
251701

257106

263003

VER
3

2

6

259757

1

257117

7

259757

3

257111

1

257103

1

Steam Plants

Question
Choice A
When placing a gag on the safety valve compression screw
shown in the illustration, it is necessary
to remove the __________.
When preparing to cut a boiler in on the
line, you determine that the steam
pressure of the incoming boiler is about
5 psig above line pressure. Which of
the following steps should you take
next?
When preparing to get underway and
the jacking gear has been disengaged,
the main turbine rotor should NOT be
allowed to remain stationary for more
than 3 minutes because __________.

Open the
superheater vent.

When preparing to hydrostatically test
water-tube boilers, you should
__________.

Choice B
cap

Open the
desuperheated
steam stop.

Test the hand
relieving gear.

uneven heating from the turbine drain
gland seal steam can lines can fill with
cause distortion of
condensate
the rotor

main condenser
vacuum will drop
rapidly without steam
flow through the
main unit

with no rotor
movement, the
journal bearings may
overheat due to
reduced lube oil flow

fill the boiler with
water not less than
70°F (21.1°C), nor
more than 160°F
(71.1°C)

remove all inspection
plates and manhole
covers as required
by the marine
inspector

have the boiler
warmed to a
temperature not
exceeding 100°F
(37.8°C)

viscous enough for
rapid pumping

entrained with air
bubbles

more than 160°F

less than 100°F

be closed until after
the air cock is
closed, and then
opened until the
boiler is placed on
line
use a small orifice
burner sprayer plate
to start

remain open or
partially open until
steam blows through
the lines, and then
the valves should be
closed
use a large orifice
burner sprayer plate
to start

raise steam within
one hour or less

Illustration
SG-0019

Light off additional
burners.

make arrangements
for simultaneously
testing main and
auxiliary steam stops
with water and steam
pressure
When preparing to light off a cold boiler, heated sufficiently for thoroughly cleaned
the fuel oil should be recirculated until it proper atomization
by the fuel oil
is __________.
strainers
When preparing water-tube boilers for more than 100°F
less than 80°F
hydrostatic testing, they shall be filled
with water at not __________.
When raising steam on a boiler, the
be opened to remove be closed until just
superheater drains should __________. condensate, and
before line pressure
then closed when the is reached, and then
first burner is lit
given a short blow
period
When raising steam on a cold boiler
under normal conditions, you should
always __________.

Choice C
Choice D
upper spring washer all of the above

take 24 hours to
raise steam

174

SP091813

ABS

VER

257105

2

254211

1

256503

2

269708

6

269708

8

269708

9

269708

12

269708

269708

4

10

Steam Plants

Question
When raising steam on an idle boiler
and the steam pressure has risen to
about 5 pounds more than the pressure
of the boiler already on the line, you can
__________.
When raising vacuum on an auxiliary
condenser, which of the following steps
is necessary?

When recirculating fuel oil prior to cold
boiler start-up, which of the listed
actions should be carried out?
When relieving the watch in the fire
room, you should first check the
___________.
When relieving the watch in the fire
room, you should first check the boiler
steam pressure and ___________.
When relieving the watch in the fire
room, you should first check the boiler
water level and __________.
When relieving the watch in the fire
room, you should first check the boiler
water level and ___________.
When relieving the watch in the fire
room, you should first check the boiler
water level and then ____________.

Choice A
close the air cock

Choice B
close the
superheater vent

Close the makeup
feed drag line to
raise hot well level.

Choice C
put the boiler on the
line

Choice D
increase the boiler
firing rate

Open the auxiliary
condensate
recirculation valve
from the auxiliary air
ejector condenser
outlet.
Increase forced draft Decrease forced
fan speed.
draft fan speed.

Rotate turbine with
Close condensate
hand jacking gear
pump vent line to
while applying gland eliminate air leaks.
seal steam.

Open the fuel oil
meter bypass.

Open the fuel oil
heater bypass.

boiler water drum
level

boiler steam drum
temperature

fuel pressure to the
burners

port and starboard
settling tank levels

boiler water level

prepare to blow
tubes

stack temperature

port and starboard
settling tanks

port and starboard
settling tank
temperatures
the port and
starboard settling
tank temperatures
check the fuel
pressure to the
burners

condition of furnace
fires

feed pump lube oil
level

make up feed tank
level

steam atomization to
the mechanical
atomizers
empty all oil drip
pans

empty all oil drip
pans

prepare to blow
tubes

check port and
starboard settling
tank levels

economizer outlet
temperature

empty all oil drip
pans

boiler water level

When relieving the watch in the fire
port and starboard
room, you should first check the fuel
settling tank levels
pressure to the boiler and _________.

175

Illustration

the condition of the
furnace fires

SP091813

ABS

VER

251300

1

257002

2

256510

262600

262601

258901

258901

2

2

2

9

4

Steam Plants

Question
Choice A
Choice B
Choice C
Choice D
When seated, the disc of a safety valve 262 psig (1907 kPa) 273 psig (1983 kPa) 284 psig (2059 kPa) 295 psig (2135 kPa)
has an area of 0.75 square inches (1.9
sq cm). When the valve lifts the area is
increased by 10%. If the valve lifts at
300 psig (2170 kPa), at approximately
what pressure will the valve reseat?
When securing a boiler, the burner
registers are to be left open for a few
minutes to __________.
When securing a fuel oil heater you
should __________.

When securing a main propulsion
turbine equipped with carbon packing
glands, the vacuum should always be
broken before securing the gland seal
steam because __________.

When securing the main engine, which
of the listed procedures should be
carried out to remove or reduce
condensation from the interior of the
main reduction gear casing?
When slight sputtering is detected at
the boiler atomizer, you should
__________.
When sputtering is detected in the
boiler fires indicating water in the fuel,
which of the procedures listed should
be followed?

cool the furnace

purge the furnace

cool the uptakes

kill steam generation

open the fuel oil
temperature
regulator bypass,
widely
the turbine rotor
expands faster than
the gland casing

cut out the steam
before securing the
oil flow

stop the oil flow and
then cut out the
steam

remove all fuel oil
pressure from the
system by securing
the service pump
gland seal leak off
lines will flood with
water

Circulate oil until oil
and gear casing
have reached
ambient
temperatures.
check for water in
the fuel supply

Continue to operate
the lube oil purifier
until there is no
water discharge.

cold air rapidly
loop seal will flood
entering the gland
the after condenser
may result in
damage to the
carbon segments
and sealing surfaces

Illustration

Continue to operate All of the above.
the lube oil cooler
and rotate the engine
with the turning gear.

increase furnace air
supply

shut off the oil supply close burner register
and purge the
shutters and
furnace
increase fuel oil
service pump speed
Start the standby fuel Increase the fuel
Increase the furnace Shift to the settler
service pump.
service pump speed. air supply pressure. high suction.

176

SP091813

ABS

VER

269937

3

269937

269937

269937

269936

269936

269936

4

1

2

1

3

4

Steam Plants

Question
Choice A
When standing watch at sea, steaming Lower DC heater
full ahead, adding large amounts of
temperature.
make-up feed water would also have a
tendency to change which of the
following parameters?

Choice B
Choice C
Decrease DC heater Increase air ejector
level.
condenser main
condensate outlet
temperature.

Choice D
All of the above.

When standing watch at sea, steaming Increase DC heater
full ahead, adding make-up feed water temperature.
from reserve feed double bottom tanks
would also have a tendency to change
which of the following parameters?

Decrease DC heater Decrease air ejector
level.
condenser main
condensate outlet
temperature.

Increase main
condensate
discharge
temperature.

When standing watch at sea, steaming Decrease DC heater Increase DC heater
full ahead, adding make-up feed water pressure.
level.
would also have a tendency to change
which of the following parameters?

Increase condensate All of the above.
depression.

When standing watch at sea, steaming Increase DC heater
full ahead, adding make-up feed water pressure.
would also have a tendency to change
which of the following parameters?

Increase DC heater
level.

Increase boiler water All of the above.
level.

When standing watch at sea, steaming Low superheat
full ahead, reducing the boiler forced
temperature.
draft pressure would also have a
tendency to correct which discrepancy?

High stack
temperature.

High atomizing
steam pressure.

When standing watch at sea, steaming High superheat
full ahead, reducing the boiler forced
temperature.
draft pressure would also have a
tendency to correct which discrepancy?

Black smoke from
the stack.

Low boiler pressure. High fuel oil
temperature.

When standing watch at sea, steaming Low fuel oil
full ahead, reducing the boiler forced
temperature.
draft pressure would also have a
tendency to correct which discrepancy?

High desuperheat
steam pressure.

White smoke coming Low furnace air
out from the stack.
pressure.

177

Illustration

High DC heater
level.

SP091813

ABS

VER

253707

4

265200

265200

265200

265200

4

6

3

5

265200

1

256311

2

251700

1

259002

2

250715

2

Steam Plants

Question
When starting a turbine driven boiler
feed pump, care should be taken to
insure that the recirculating valve is
open. Which of the following valves
should be closed when starting?
When starting a turbo generator in an
automated plant, you must provide lube
oil pressure to the unit by means of
__________.
When starting a turbo generator in an
automated plant, you must provide
external lube oil pressure to the unit for
the purpose of _________.
When starting a turbo generator in an
automated plant, you must provide lube
oil pressure to the unit by means of a/an
__________.
When starting a turbo generator, you
must initially provide external governor
lube oil pressure to ________.

Choice A
Pump discharge
valve

When starting a turbo generator, you
must provide lube oil pressure to the
governor power piston by means of
__________.
When testing boiler flue gas with a
chemical absorption apparatus, to
obtain accurate results __________.
When testing boiler safeties, those
valves not being tested are prevented
from lifting by __________.
When the automatic combustion control
fails, what should you do to control the
air supply to a boiler?
When the boiler is operating at high
firing rates, in addition to the generating
tubes, which of the following tubes will
also function as generating tubes?

Choice C
Turbine steam
supply valve

Choice D
Turbine exhaust
valve

a line from the other a line from the
generator
gravity tank

the main lube oil
pump

the hand operated or
auxiliary lube oil
pump

energizing the
generator overfeed
trip
auxiliary lube oil
pump

pressurizing the
power piston to raise
the nozzle lifting
beam
line from the other
generator

opening the exhaust pressurizing the
dump valve
power piston to lower
the nozzle lifting
beam
line from the gravity line from the main
tank
lube oil pump

energize the over
speed trip

raise the nozzle
valve lifting beam

energize the gland
seal regulator

open the turbine
exhaust valve

a line from the other a line from the
generator
gravity tank

the main lube oil
pump

the hand operated or
auxiliary lube oil
pump

prevent any air from
contaminating the
gas sample
installing gags

run each analysis for purge the apparatus
at least 3 minutes
with air before use

Reduce the firing
rate.
Downcomers and
water wall tubes

Choice B
Pump suction valve

analyze for nitrogen
content before
oxygen content
securing the lifting
arms

temporarily
increasing the valve
spring pressure
Open the forced
Manually control the
draft fan crossover
fan discharge
damper.
damper position.
Superheater support, Water screen,
water screen, and
superheater support,
water wall tubes
and economizer
tubes

178

Illustration

closing the actuating
pilot valve
Manually control the
fan inlet damper
position.
Water wall, water
screen, and
economizer tubes

SP091813

ABS

VER

258901

6

256808

267809

252821

267218

268108

1

1

1

1

2

268108

4

258204

2

260601

1

Steam Plants

Question
When the fires begin to sputter, you
should __________.

Choice A
decrease the
manifold pressure

Choice B
increase the
manifold pressure

When the flame scanner senses flame
failure during boiler operation, which of
the listed events will occur FIRST?

The fuel oil service
pump is stopped.

The automatic purge The fuel oil solenoid The 'trial for ignition'
cycle commences.
valve is deperiod commences.
energized.

When the flow of oil admitted to a disktype centrifugal purifier is in excess of
its designed capacity, which of the
following conditions will usually occur?

The oil will
discharged through
the heavy phase
discharge port.

The speed of the
centrifuge will
increase.

All water will be
retained by the
purified oil being
discharge.

Oil will be present in
the water sealing line
to the bowl.

When the rate of heat transfer through
tube walls is so reduced that the metal
becomes overheated, which of the
following conditions will result in the
boiler?
When the temperature of the main
turbine lubricating oil is lowered, an
increase will occur in the __________.

Steam gouging

Fireside burning

Fireside thinning

Steam binding

pour point

concentration of
contaminants

viscosity

flash point

When there is a sudden increase of
pump relief valve
lubricating oil pump discharge pressure
in a force feed lubricating system, you
should FIRST check the __________.

lubricating oil cooler
outlet temperature

lubricating oil flow
from the bearings

lubricating oil suction
strainers

When there is a sudden increase of
pump relief valve
lubricating oil pump discharge pressure
in a force feed lubricating system, you
should FIRST check the __________.

lubricating oil sump
level

lubricating oil flow
from the bearings

lubricating oil suction
strainers

When too much excess air is supplied heat loss will be
to an operating boiler, the __________. reduced

heat loss will be
excessive

flame will impinge on flame will be a deep
the burner cone
red color

When turbine rotor shafts extend
through the casing, an external source
of sealing steam is used in conjunction
with labyrinth packing to __________.

seal the casing
seal the casing
provide a constant
during periods of low during periods of
flow to the gland leak
casing pressure
high casing pressure off condenser

maintain the rotor
journal temperature

179

Choice C
Choice D
take suction from
switch the duplex
another settling tank strainer elements

Illustration

SP091813

ABS

VER

251504

1

268401

2

251800

250007

256510

267834

252204

252204

1

3

1

2

1

2

Steam Plants

Question
Choice A
When two or more boilers provide
auxiliary steam stop
steam flow to a common main steam
valve
line, each boiler main steam line shall
be fitted with a main steam stop valve
and a/an __________.
When used as a separator, a
water to contaminate
centrifugal purifier may lose its seal and the lube oil
cause __________.
When using the universal color contrast- black against a white
type dye penetrant to examine a boiler background
weldment, any surface defect will
appear __________.

Choice B
stop-check valve

Choice C
swing check valve

Choice D
gate valve

the purifier pump to
lose suction

water flow from the
oil discharge

oil flow from the
water discharge

white against a black white against a dull
background
red background

bright red against a
white background

When vapor is in contact with and
remains at the same temperature as
the boiling liquid from which it was
generated, the vapor and liquid are said
to be in a/an __________.
When warming up a fuel oil service
system, you should open the steam
supply to the fuel oil heaters
__________.
When water is removed from lube oil
passing through a centrifugal purifier,
the water removed will __________.

latent contact

critical state

saturated condition

When water washing a boiler, the
proper sequence for washing the
sections should be the __________.

generating tubes,
superheater, and
then economizer

When water washing the firesides of a
boiler, which of the listed procedures
should be followed?

sensible contact

before you start the after you start the
only if the settlers
fuel oil service pump fuel oil service pump are incapable of
heating the oil

before you open the
recirculating valve

be retained in the
bowl

displace an equal
amount of water
from the bowl seal

force the diameter of
the oil column within
the bowl to be
narrowed

superheater,
economizer, and
then generating
tubes
Begin water washing Begin the washing
while the brickwork is above the
still warm.
economizer and
work down.

180

displace water from
the heavy phase
discharge port, but of
an amount less than
that removed from
the oil
screen tubes,
generating tubes,
and then
superheater
Assure that the water
stream impinges
directly on the
refractory to avoid
tube damage.

Illustration

economizer,
superheater,
generating, and then
screen tubes
Dry the boiler by
firing all burners at
high rates to
evaporate moisture
rapidly.

SP091813

ABS

VER

251600

3

251600

251600

2

1

Question
When you are installing a new furnace
floor in an oil fired boiler, enough
clearance should be left between
firebrick to allow for __________.

Choice A
Choice B
Choice C
expansion when the flame penetration of proper filling of the
boiler is fired
the joint
joint with slag

When you are installing a new furnace
floor in an oil fired boiler, the clearance
between each firebrick should be
enough to __________.

allow for expansion
without subjecting
the joint to flame
penetration

facilitate rebricking at
required
maintenance
intervals

allow for proper filling allow for installation
with slag under
of plastic chrome ore
normal operating
after drying
conditions

When you are installing a new furnace
floor in an oil fired boiler, the clearance
between the firebricks should be large
enough to __________.

allow for expansion
without subjecting
the joint to flame
penetration

facilitate rebricking at
required
maintenance
intervals

allow for proper filling allow for installation
with slag under
of plastic chrome ore
normal operating
after drying
conditions

256001

2

256001

1

251400

2

plugging gooseneck maintaining a high
tank vents to prevent transfer rate until a
accidental overflow slight trickle of oil is
observed flowing
from the overflow
line
When you are transferring fuel oil to the plugging gooseneck maintaining a high
settling tanks, precautions to be
tank vents to prevent transfer rate until a
observed should include __________. accidental overflow slight trickle of oil is
observed flowing
from the overflow
line
Whenever operating a boiler, whose
it is necessary to fire there is always the
economizer is bypassed, always keep more fuel to maintain danger of metal
in mind that __________.
the required
oxidation in the
evaporative rating
economizer

260800

1

Where are moisture shields located in a Around throttle valve At the steam strainer At the inner stage
main propulsion steam turbine?
stems
inlet
diaphragms

Steam Plants

When you are transferring fuel oil from
one double bottom tank to another,
precautions to be observed should
include __________.

181

Choice D
ramming with plastic
chrome ore

Illustration

sounding the tanks
frequently and
reducing the transfer
rate while topping off

maintaining a supply
of chemical
dispersant to
cleanup minor oil
spills adjacent to the
ship
sounding the tanks maintaining a supply
frequently and
of chemical
reducing the transfer dispersant to
rate as the level
cleanup minor oil
approaches
spills adjacent to the
maximum fill
ship
less heat is actually all of the above
being transferred to
the steam because
of the decrease in
the ratio of gas to
steam weight
After the last stage of
the ahead rotor
blading

SP091813

ABS

VER

251000

1

250603

1

261008

261008

3

2

258000

1

258604

2

250720

1

256335

1

256100

1

258208

1

255601

2

Steam Plants

Question
Where is the 'dry pipe' located in a
boiler?

Choice A
At the superheater
outlet

Where is the superheater located in the G
boiler shown in the illustration?
Where reaction turbine blading is fitted Rotor axial position
with shrouding of "end tightened"
design, which of the following conditions
will be the most critical to efficient
turbine operation?
Where reaction turbine blading is fitted Rotor axial position
with shrouding of "end tightened"
design, which of the following operating
parameters must be carefully monitored
for efficient turbine operation?
Which action should be taken if the
water level in the boiler gage glass
drops out of sight and the burners fail to
secure automatically?
Which actions listed should be taken if
a boiler is panting?

Choice B
Behind the
superheater screen
tubes
H

Choice C
In the top of the
steam drum

Illustration
Choice D
Below the generation
tube bank

I

J

Diaphragm
clearance position

Rotor radial position Rotor casing sliding
foot position

Diaphragm
clearance position

LP bleed steam
pressure

HP bleed steam
pressure

Increase the feed
pump speed.

Repair the feed
water regulator.

Decrease the boiler
water level.

Increase the boiler
water level.

D

E

Blow down the gage Trip the master
glass.
solenoid.

Decrease the air
pressure to the
burners.
Which area shown in the illustration will B
offer the most resistance to heat
transfer from the fireside to the
waterside of a boiler tube?
Which atomizing sprayer plate has the 4309
largest capacity?
Which characteristic of fuel oil is the
Viscosity
most significant when determining the
temperature to which the fuel oil must
be heated for proper atomization?

Increase the air
pressure to the
burners.
C

Which color burner flame would indicate Orange red
too much excess air?
Which combustible element in fuel oil is Hydrogen
considered a significant and major
source of air pollution?

SG-0008

SG-0017
2909

2 PCRS 3509

3009

Flash point

Pour point

Specific gravity

Yellowish orange

Bright red

Incandescent white

Nitrogen

Vanadium

Sulfur

182

SP091813

ABS

VER

268804

1

269851

269851

269851

269851

269851

7

4

5

6

8

Steam Plants

Question
Which component of a Kingsbury thrust
bearing assembly transmits the thrust
from the line shaft to the oil film and
shoes?
Which condition could cause a low level
in the deaerating feed water tank (DC
heater) as the vessel is increasing from
maneuvering to sea speed?

Choice A
Collar

Choice B
Lower leveling plate

Choice C
Upper leveling plate

Choice D
Base ring

Illustration

Maintaining the water Excessive
Insufficient flow of
All of the above
levels of both boilers recirculation of main make-up feed to the
excessively high
condensate
condenser

Which condition would cause a
dangerously low level in the deaerating
feed water tank (Direct Contact) heater
during maneuvering?

Excessive dumping
of feed water to the
distilled water tank
via the automatic
dump valve.
Which condition would cause a
Excessive dumping
dangerously low level in the deaerating of feed water to the
feed water tank (Direct Contact) heater drain inspection tank
as the vessel is increasing from
via the automatic
maneuvering to sea speed?
dump valve.

Excessive
recirculation of
condensate to the
drain inspection
tank.
Excessive
recirculation of
condensate to the
drain transfer tank.

Improper operation
of the auxiliary
exhaust live steam
dump valve.

Which condition would cause a
dangerously low level in the deaerating
feed water tank (Direct Contact) heater
as the vessel is increasing from
maneuvering to sea speed?

Excessive dumping
of feed water to the
drain inspection tank
via the automatic
dump valve

Excessive
recirculation of
condensate to the
drain transfer tank

Internal collapse of a
rubber expansion
joint located in the
condensate pump
suction line

Which condition would cause a high
level in the deaerating feed water tank
(DC heater)?

Excessive dumping
of feed water to the
distilled water tank.

Excessive
recirculation of
condensate to the
auxiliary condenser.

Temporarily
Improper operation
operating both
of the air ejector loop
boilers at below
seal.
normal water levels.

183

Improper operation
of the auxiliary
exhaust live steam
dump valve.

Open bypass valve
of the
automatic/pneumatic
makeup valve
assembly.
Clogged "Y" strainer
at the air supply of
the pneumatically
operated condensate
makeup valve
assembly.

Clogged "Y" strainer
at the condensate
inlet of the
pneumatically
operated condensate
recirculating valve
assembly

SP091813

ABS

VER

269851

2

269851

3

255700

1

269857

256334

269083

257117

257117

1

2

2

3

6

Steam Plants

Question
Choice A
Which condition would cause an
Excessive dumping
excessively high level in the deaerating of feed water to the
feed water tank (DC heater)?
distilled water tank.

Choice B
Choice C
Excessive
Improper operation
recirculation of
of the condensate
condensate to the
makeup valve.
auxiliary condenser.

Illustration
Choice D
Improper operation
of the air ejector loop
seal.

Which condition would cause an
Excessive dumping
excessively high level in the deaerating of feed water to the
feed water tank (Direct Contact) heater distilled water tank.
during maneuvering?

Excessive
recirculation of
condensate to the
auxiliary condenser.

Open bypass valve
to the automatic
makeup valve
assembly.

Which constituent of fuel oil determines
the specific heat?
Which following condition could occur if
the distilled water tank level indicator
has been giving an erroneously high
reading?

Hydrocarbons

Oxygen

It is possible to lose
vacuum if the level
drops below the
make-up feed piping
connection.

Past logbook entries
must all be changed
to indicate actual
amounts.

The tank may
All of the above are
overflow in the
correct.
engine space
causing unnecessary
damage to electrical
equipment.

Which group of numbers would indicate 2909
the largest fuel capacity for a sprayer
plate in a mechanical fuel oil atomizer?

3509

43709

Which immediate action should you
take when the temperature of one line
shaft bearing increases above its
normal operating temperature?
Which normally closed valve would
have to be at least partially open prior to
actually lighting off a cold boiler as
shown in the illustration?
Which normally closed valve would
have to be at least partially open prior to
actually lighting off a cold boiler as
shown in the illustration?

Stop the unit and
carefully inspect the
bearing.

Stop the unit and
replace the bearing.

Check the bearing
Check for proper
for proper lubrication. water circulation to
the lube oil coolers.

J

F

D

Improper operation
of the live steam
makeup valve
supplying the
auxiliary exhaust
system.
Nitrogen

Sulphur

3 PCRS 4309

C
SG-0009

C

D

F

J
SG-0009

184

SP091813

ABS

VER

257000

1

261400

2

250310

1

250062

9

258403

1

259766

1

267208

1

254405

1

254111

1

258013

1

Steam Plants

Question
Which of the actions listed should be
carried out immediately after securing
the fires in one boiler of a two boiler
ship?
Which of the bearings listed is used in
some turbines to limit axial movement?

Choice A
Relieve all fuel oil
service pressure to
that boiler.

Choice B
Choice C
Open the air
Drain and refill the
registers wide to cool boiler with cold
the furnace.
water.

Choice D
Secure the main
feed pump.

Pivoted-shoe type
thrust bearing

Cylindrical bearing

Which of the boiler components listed
receives feed water and serves as an
area for the accumulation of saturated
steam?
Which of the boiler end points should
be reached first?
Which of the casualties listed is apt to
occur immediately after a high water
casualty?
Which of the Coast Guard publications
listed contain the information regarding
allowable repairs to boilers installed on
cargo vessels?

Steam drum

Self-adjusting,
Journal bearing
spherically-seated,
self-aligning bearing
Headers
Water drum

Water circulation

Moisture carryover

Combustion

Atomization

Massive tube failure Water carryover to
the turbines

Excessive steam
pressure

Rules and
Regulations for
Cargo and
Miscellaneous
Vessels
Strainer

Manufacturer's
Instruction Manual

Marine Engineering
Regulations

Excessive
superheater
temperature
Modern Marine
Engineer's Manual

Sight glass

Drain

Branch line

Which of the components listed is
indicated by the "X" shown in the
illustration?
Which of the components listed
Exhaust piping
prevents water from flowing back into
the auxiliary exhaust line if the
deaerating feed tank becomes flooded?
Which of the condensers listed is
cooled by sea water?
Which of the conditions listed can
cause the flame of a mechanically
atomized burner to be blown away from
the burner tip when you are attempting
to light off?

Illustration

Superheater headers

SE-0010
Pumps

Check valve

Reverse-acting relief
valve

Air ejector condenser Main condenser

Vent condenser

Insufficient excess
air is being supplied
to the furnace.

The diffuser is
burned out.

Gland exhaust
condenser
The secondary air
cone is improperly
adjusted.

Fuel oil viscosity is
too low.

185

SP091813

ABS

VER

258013

2

253101

1

252901

1

268105

1

251405

1

255307

1

264603

3

255206

252702

269501

1

1

1

Steam Plants

Question
Which of the conditions listed could be
responsible for the flame of a
mechanical atomizer to blow out when
attempting to light off?
Which of the conditions listed could be
the cause of chattering in a boiler safety
valve?
Which of the conditions listed could
cause a boiler economizer to leak?
Which of the conditions listed could
cause an oil flow sight glass, of a main
turbine bearing, to be completely filled
with oil?
Which of the conditions listed could
cause steam formation in the
economizer?
Which of the conditions listed could
prevent a centrifugal condensate pump
from developing its rated capacity?

Choice A
Choice B
The openings in the The radial air doors
diffuser are
are closed.
improperly adjusted.

Choice C
Choice D
The distance piece is The viscosity of the
improperly adjusted. fuel oil is too low.

Excessive spring
tension.

Loose blow down
ring.

Excessive blow
down adjustment.

Scale in the escape
piping.

High feed water
temperatures.
An increase in oil
temperature.

Low feed water
pressure.
A restriction in the oil
drain line to the
sump.

High stack gas
temperatures.
Excessive air
trapped in the lube
oil system.

Water hammer.

Which of the conditions listed is the
most common source of torsional
vibration in a geared turbine drive?
Which of the conditions listed may be
indicated by the lifting of the DC heater
relief valve?

Gear excited critical
vibrations

Propeller excited
vibrations

Turbine rotor
imbalance

Changing shaft
thrust

A malfunctioning
auxiliary exhaust
make-up steam
regulating valve.
Formation of a
protective coating.

Excessive
deaeration of the
feed water.

Low back pressure in Low water level
the auxiliary exhaust continually
line.
maintained in the DC
heater.
Damage to the
Cracks through the
furnace refractory.
furnace floor.

Illustration

Increasing the
amount of oil through
the gravity tank
overflow line.
Excessive water flow Sudden large
Soot buildup on the An open main feed
rates.
increase in the firing gill rings.
pump recirculating
rate.
line.
Venting the pump to Closing the water
Flooding of the main Operating the pump
the vacuum side of seal line to the
condenser hot well. with a positive
the condenser.
packing gland.
suction head.

Which of the conditions listed occurs
when glassy slag, formed by the
burning of fuel oil contaminated with salt
water, melts and runs over the furnace
wall?
Which of the conditions listed should be Steam leaving the
immediately reported to the engineering vent of the gland
officer on watch?
exhaust condenser.

Increased furnace
temperature.

Lube oil passing
Oil in the drain
through the bull's eye inspection tank.
of the gravity tank
overflow line.

186

Water trickling in
through the stern
gland.

SP091813

ABS

VER

251310

2

269858

2

257810

1

253003

1

264603

5

253100

2

260002

1

255202

2

268706

2

Steam Plants

Question
Which of the conditions listed will
provide 'blow down' after the safety
valve has lifted?

Choice A
The valve is held
open by a pressure
pilot line.

Choice B
Choice C
Once the valve has Once the valve lifts,
opened, the existing the set opening
steam pressure acts pressure changes.
on an enlarged area
creating an opening
force greater than
that which opened
the valve.

Illustration
Choice D
The safety valve
opens gradually but
with decreasing lift
during the blow down
period.

Which of the conditions listed would
cause the stern tube lube oil head tank
level to decrease?

An increase in sea
water temperature.

The entry of sea
water into the
system.

An increase in the
stern bearing
operating
temperature.
Decreasing fuel oil
Dirt and sediment
Decreasing pressure
temperature
deposits in the
drop across the
atomizers
strainer
High feed water
Low air temperature High superheater
temperature entering entering the boiler
temperature
the boiler
Loss of condenser
High steam
Decreased
vacuum.
temperature in the
condensate salinity.
high pressure turbine
steam chest.

A worn or damaged
stern tube seal.

Which of the conditions will occur
FIRST if the steam flow to the main
engine, when at full power, is suddenly
stopped?

Drum safety valve
will open.

Combustion control
system will
automatically secure
all of the burners.

Which of the coupling types listed is
shown in the illustration?
Which of the DC heater operations
listed will result in excessive dissolved
oxygen in boiler water?
Which of the devices listed are used to
rigidly mount reduction gear bearings in
their housings?

Claw

Which of the conditions listed would
indicate a dirty fuel oil strainer?
Which of the conditions listed would
indicate excessive soot buildup on the
economizer?
Which of the conditions listed would
indicate water carryover to a turbine?

Excessively high
water level in the
heater.
Keyways and keys

Dual element
Superheater safety
automatic feed water valve will open.
regulator will
compensate for
boiler water swell.
Pin
Gear
Adding excessive
make up feed.
Spherical housings

187

Decreasing fuel oil
pressure at the
burner manifold
Lower than usual air
pressure in the
furnace
Noise and vibration
in the turbine.

Solid

SE-0001

Operating the heater All of the above.
with a closed air
vent.
Dowels or locking
Notched construction
screws

SP091813

ABS

VER

263300

3

261803

2

260403

1

263000

1

251401

1

250606

1

261006

4

261007

1

254301

1

254409

261231

3

1

Steam Plants

Question
Choice A
Which of the devices listed can be used Bridge gage
to determine bearing wear on a main
propulsion turbine bearing?
Which of the devices listed is commonly Sliding sleeve
used to compensate for the expansion
and minor misalignments occurring
between the main turbine rotor and the
reduction gear?

Choice B
Soft lead wires

Choice C
Micrometer depth
gages

Choice D
All of the above.

Gear type flexible
coupling

Expansion gear

Quill shaft

Which of the devices listed is found on
an LP main propulsion steam turbine
casing?
Which of the devices listed is generally
used to engage the main engine turning
gear to the high pressure turbine highspeed pinion?
Which of the devices listed is indicated
by arrow "H" shown in the illustration?

Duplex set of relief
valves

Sliding beam

HP turbine bypass
valve

Sentinel valve

Manually operated
band brake

Manually operated
sliding jaw clutch

Sleeve coupling

Quill shaft

Economizer

Steam soot blowers

Overdeck
superheater

Air heater

Which of the devices listed is shown in
the boiler illustration?
Which of the devices listed is used to
convert thermal energy into rotor kinetic
energy in a reaction turbine?
Which of the devices listed is used to
convert thermal energy to useful
mechanical work?
Which of the devices listed is used to
keep overheated condensate from
flowing to the deaerating feed tank?
Which of the drains listed could be led
directly to a DC heater operating at 35
psig (343 kPa)?

Retractable soot
blower
Nozzle diaphragms

Separately fired
superheater
Labyrinth nozzles

Regenerative air
heater
Moving blades

Integral or interdeck
superheater
None of the above

Turbine

Condenser

Air ejector

Each of the above

Saltwater cooler

Freshwater cooler

Recirculating line to
the main condenser

Recirculating line to
the main feed pump

An auxiliary steam
line drain.

Only those steam
drains which operate
at 35 psig (343 kPa)
or less.
Velocity decreases
and pressure
decreases

Drain inspection tank Contaminated
overflow only.
evaporator relief
valve drain only.

Which of the effects listed describes the Velocity increases
changes in the velocity and pressure of and pressure
the steam as it passes through a
increases
nozzle?

Velocity increases
and pressure
decreases

188

Velocity decreases
and pressure
increases

Illustration

SG-0008
SG-0008

SP091813

ABS

VER

268803

1

268902

2

258221

5

252804

256202

256202

254202

1

Question
Which of the features listed, regarding
the Kingsbury thrust bearing, prevents
the base ring from turning and secures
it to its housing?
Which of the flexible coupling types
listed is used in most turbine reduction
gear installations?
Which of the flue gas components listed
contributes to the greatest heat loss in
a boiler?
Which of the following actions should
be carried out if the boiler water level is
falling due to a tube failure?

Pin

Choice A

Choice B
Dowel

Choice C
Choice D
A combination of pin Keyed construction
and dowel

Friction clutch

Gear

Bend

Flange

Carbon monoxide

Nitrogen

Carbon dioxide

Superheated water
vapor

Secure the fires and Speed up the feed
try to maintain the
pump to keep the
water level.
water level up while
firing the boiler.
Shift to the settler
Shift to the settler
high suction valve.
low suction valve.

1

Which of the following actions should
be taken FIRST when the boiler fires
begin to sputter due to water in the fuel
oil?
Which of the following actions should
Shift pump suction to Shift to alternate or
be taken FIRST when water is found in an alternate settling standby fuel oil
the fuel oil settling tank?
tank.
service pump.

1

Which of the following actions should
be taken to reestablish a 'blown' air
ejector loop seal?

3

250906

1

268800

2

Steam Plants

Increase the
condensate flow
through the air
ejector.

Open the auxiliary
Start the standby
feed stop and check feed pump and feed
for extra feed.
the boiler using two
feed pumps.
Shift to the standby Shift to the standby
fuel oil heater.
fuel oil pump.

Sound the settling
tank with water
indicating paste.

Determine the extent
of water
contamination by
reading the
pneumercators.
Momentarily close
Shut off the steam to Decrease the steam
the valve in the loop the second stage air pressure to the air
seal line, then
ejector momentarily ejector nozzles.
reopen slowly.
then open it again.

Which of the following actions, if any,
Reduce the firing
should be taken if the water gage glass rate.
on a steaming boiler breaks?

Close in on the feed Close the gage glass No action is
stop-check valve.
cutout valves.
necessary since
checks in the cutout
valves automatically
seat to stop loss of
steam and water.

Which of the following bearings is
designed to take loads applied to the
axis of the shaft?

Spring

Radial

Illustration

189

Strut

Thrust

SP091813

ABS

VER

210012

1

258210

2

256315

1

252800

1

252707

1

267226

2

264200

268101

1

2

Steam Plants

Question
Which of the following best describes
Boyle's law.

Choice A
The volume of an
enclosed gas varies
inversely with the
applied pressure,
provided the
temperature remains
constant.
Black haze

Choice B
Choice C
Choice D
If the pressure is
A body at rest tends A body in motion
constant, the volume to remain at rest.
tends to remain in
of an enclosed gas
motion.
varies indirectly with
absolute
temperature.

Which of the following boiler stack
(smoke color) conditions indicates
efficient combustion?
Which of the following chemicals is
Cuprous chloride
used in an Orsat apparatus to absorb
carbon dioxide?
Which of the following conditions in a
Film boiling
water-tube boiler generating tube could
cause tube failure, even if the water
gage glass shows the proper level?

White haze

Brown haze

Pyrogallic acid

Potassium hydroxide Potassium chromate

low dissolved oxygen Decreased
content
superheat

A film of soot

Which of the following conditions is
The furnace
indicated by an external bulge or bowed brickwork has
area of the boiler furnace wall?
collapsed in that
area.
Which of the following conditions is
Excessive oil is
indicated by oil flowing through a lube
stored in the gravity
oil gravity tank overflow bulls-eye?
tank.
Which of the following conditions is
Vacuum leak in the
indicated by the necessity of providing condenser shell.
excessive gland sealing steam pressure
to maintain the normal operating
conditions of the main propulsion unit?

The brickwork has
become slagged.

The insulation block
has become
slagged.

The corbels have
failed.

Sufficient oil flow is
being supplied to the
gravity tank.
Flooded main
condenser hot well.

Insufficient oil is
being pumped to the
gravity tank.
Worn or damaged
labyrinth packing.

Turbine bearing
failure has occurred.

Illustration

Yellow haze

Restriction in the
gland leak off piping.

Which of the following conditions is the Gravity tank low level Lack of oil in the
High main engine
Low main sump level
engineer's FIRST warning that the main alarm will sound.
overflow bull's-eye is bearing
alarm will sound.
lube oil pump has stopped?
observed.
temperatures will be
noted.

190

SP091813

ABS

VER

250313

4

268201

250020

252702

1

2

3

268706

1

261222

1

261222

2

Steam Plants

Question
Choice A
Which of the following conditions is true All saddles are a
concerning the boiler water drum
rigid support and are
foundations?
welded directly to
the ship's framework.

Choice B
In a typical
installation, the water
drum is secured
solidly to the ship's
foundation on one
end and free to move
on the other.

Which of the following conditions may
exist if you detect an excessive amount
of metal particles on a main engine lube
oil strainer magnet?
Which of the following conditions must
exist before the superheating of
saturated steam can occur in a steam
propulsion boiler?
Which of the following conditions will
occur when a glassy film forms on the
furnace wall due to the burning of fuel
oil contaminated with salt water?

Turbine shrouding
damage.

Journal bearing
damage.

The firing rate of the The flow of feed
boiler must be
water to the boiler
increased.
must be increased.

Choice C
Choice D
Good preventive
All of the above.
maintenance
practice includes
chipping the sliding
feet and
phosphorous bronze
chocks to remove all
rust and corrosion to
insure free
movement.
Reduction gear
Main shaft bearing
damage.
damage.

The steam must be
directed to an area
separate from the
steam drum.
Formation of the
The average furnace The slagged sections
protective coating will temperature will
will eventually peel
increase the overall increase.
off the surface of the
life of the furnace
wall.
refractory.
Which of the following construction
They are always
They are secured in They are split into
methods would apply to the Babbitt
mounted with the
their housing so
four equal sized
lined, split-type, reduction gear
split in a horizontal
pressure points will segments.
bearings?
plane.
occur at the joint
faces.
Which of the following descriptions best One set of nozzles
One set of nozzles
Two sets of nozzles
describes a basic Rateau turbine
and two rows of
and one row of
and two rows of
stage?
moving blades.
moving blades.
moving blades.
Which of the following designs is an
A large pressure and The use of alternate The use of a velocityessential feature of the Rateau type
temperature drop
rows of fixed and
compounded
turbine?
occurring in the first moving blades.
impulse stage
stage.
installed at the high
pressure end of the
turbine.

191

Illustration

The economizer
must be on line.

Cracks will begin to
occur in the furnace
floor.

They are rigidly
mounted and
dowelled in their
housings.
Two sets of nozzles
and one row of
moving blades.
Two or more simple
impulse stages
aligned in tandem in
one casing.

SP091813

ABS

VER

250402

4

268815

268603

256000

253306

250803

2

1

1

2

2

266000

2

257205

1

251202

2

Steam Plants

Question
Which of the following devices can be
used to secure or hold furnace
refractory in position?
Which of the following enables a
Kingsbury, or any pivot shoe type thrust
bearing, to bear a much greater load
per square inch of working surface than
parallel surface bearings?

Choice A
Brick bolts

Choice B
Boiler tubes

Choice C
Anchor strips

Choice D
All of the above

The thickness of the
filler piece behind the
pivotal-shoes is
adjusted to obtain a
more accurate fit.

Clearances are
automatically
adjusted to the
correct value when
wear occurs.

The shoes tilt slightly
thereby allowing the
formation of a wedge
shaped oil film under
a thrust load.

The shoes pivot,
thus remaining
parallel with the
collar when thrust
loads are applied.

Which of the following factors
determines the type of construction
used for gear hubs in shipboard
reduction gear units?
Which of the following fuel oil
characteristics establishes the danger
point when transferring, pumping, and
firing procedures are concerned?

Size of the gear
wheel

Type of reduction
gear unit

Type of ship using
installation

Type of steam
turbine installation

Fire point

Flash point

Specific gravity

Viscosity

Which of the following is the advantage
of operating a typical closed feed water
system for a marine boiler when
compared to an open feed water
system?
Which of the following is the best
reason for opening the air cock when
draining a water-tube boiler?

Reduced steam
Increased capability Reduced
requirement for feed of removing and
requirement for
water heating.
controlling dissolved condensate purity.
oxygen.

Allows for lower feed
pump operating
pressures.

With the air cock
open, the boiler
drains without
producing a vacuum.

Water flows out of
the boiler too rapidly
with the air cock
closed.

Air mixed with the
water will create a
cleansing effect in
the tubes.

Air coming into the
boiler will help dry
out the boiler's
surface.

Which of the following is used to hold
the poppet valves closed in a turbo
generators nozzle control speed
regulator?
Which of the following items should be
checked each time the firing rate or
forced draft pressure is adjusted?
Which of the following locations could
desuperheated steam be considered to
occur?

Lifting beam

Springs

Steam pressure

Oil pressure

Fuel oil heater inlet
temperature

Atomizing steam
pressure

Smoke periscope

Fuel oil suction
pressure

Spray attemperator

Main engine
extractions

Both "A" and "B '

Neither "A" nor "B"

192

Illustration

SP091813

ABS

VER

267206

3

261000

268600

268703

260000

261200

1

2

1

2

2

Steam Plants

Question
Which of the following lube oil system
lines generally includes an illuminated
sight glass (bull's-eye)?
Which of the following methods is used
to counter axial thrust in a single flow
reaction turbine?

Choice A
Lube oil pump
suction

Choice B
Lube oil pump
discharge

A dummy piston and Pressure equalizing
cylinder at the
holes in the
turbine inlet end
individual rotor
wheels
Which of the following methods is used The gears run
Oil is sprayed
to lubricate main propulsion turbine
through an open oil through nozzles at
reduction gears?
sump and oil is
the point of gear
carried along on the mesh.
gear teeth.
Which of the following methods is used The Babbitt is
to securely fasten the Babbitt lining of a centrifugally spun
reduction gear bearing to its shell?
into the bearings or
cast under a
pressure head.

The Babbitt is
relieved in way of the
split and held in
place by locking
pins.

Choice C
Gravity tank
discharge

Illustration
Choice D
Gravity tank overflow

Labyrinth packing

Carbon packing

Oil is pressure fed
through internal
drilled passages
which force oil to the
gear's periphery.

Oil rings in channels
outside the gears dip
into oil in the sump
and carry it to the
gear teeth.

The Babbitt is
securely bonded to
the shell by the
pressure of the
hydrodynamic oil
wedge.
Which of the following methods
External teeth on the Each gear is allowed A coupling permits
provides for axial movement in a gear floating member are to slide on its shaft
free relative radial
type flexible coupling?
allowed to slide
between retaining
motion of the gear
between internal
collars.
and pinion, thereby
teeth on the shaft
allowing axial
rings.
movement.
Which of the following occurs in a single The steam
Steam velocity and Steam expands
stage of a simple impulse turbine?
experiences a single pressure decreases through the nozzles
pressure drop
through the nozzles and impinges on a
through the nozzles and impinge on a
row of reaction
and impinges on a
row of moving
blading causing an
row of moving
reaction blades.
additional pressure
impulse blades.
drop.

193

The Babbitt has a
crescent shaped
pocket cast
symmetrically about
the bearing split.
Opposing helices act
to balance axial
thrust with the
coupling.

Steam velocity
decreases and
pressure increases
through the nozzles
and impinges on a
row of impulse
blades.

SP091813

ABS

VER

262601

1

259302

1

257107

2

263011

1

252805

1

269120

1

257400

1

261006

3

Steam Plants

Question
Which of the following operational
practices is helpful in avoiding the
accumulation of condensate in the main
reduction gear casing?

Choice A
Always ensure that
the lubricating oil
pressure is 14-17 psi
when operating in
unusually cold
waters.

Which of the following precautions
Cool the feed water
should be observed when adding
before it enters the
treatment chemicals to the boiler
tank.
compound tank?
Which of the following precautions
Secure the main
should be taken prior to lighting off a
steam line drains.
boiler?
Which of the following problems can
Distortion of the rotor
occur from improper main turbine warmup?
Which of the following problems can
Superheater outlet
occur when an excessive number of
pressure will rise.
water screen tubes are plugged?
Which of the following problems is likely Aeration of the oil.
to occur if the lube oil level in the sump
is too high?
Which of the following procedures
represents the proper care of unused
burners during low load conditions?

Which of the following reaction turbine
components listed converts thermal
energy into kinetic energy.

Choice B
The temperature of
the lubricating oil
should not exceed
the gear
manufacturer's
recommendation
when the unit is
operating at full load.

Choice C
After the main unit is
secured, lubricating
oil should be
circulated until the
temperature of the oil
and reduction gear
casing approximates
the engine room
temperature.

Ensure there is no
Raise the boiler
pressure on the tank water level before
before opening it.
adding chemicals.

Illustration
Choice D
Avoid applying gland
sealing steam to the
low pressure turbine
until you are ready to
start up the firststage air ejector.

All of the above.

Close the air
register.

Bottom blow the mud Purge the furnace of
drum.
combustible gases.

Rubbing of blades

Uneven casing
heating

Superheater outlet
Steam pressure
temperature will rise. leaving the drum will
increase.
A rise in oil
The main engine
temperature.
could not be
operated at full
speed.
They should be
They should be
They may be left in
removed, cleaned,
removed, cleaned
place, with fuel and
refitted with smaller and stored in the
steam secured as
tips and reinstalled to rack on the burner
long as they are not
be ready for
bench.
fouled.
immediate use.
Fixed and moving
Fixed blades only
Moving blades only
blades

194

All of the above

Steam temperature
in the drum will
decrease.
All of the above.

They may be left in
place, but only if they
are clean and if fuel
oil is recirculated to
provide cooling.
None of the above

SP091813

ABS

VER

261006

5

250408

250405

250405

252106

256816

256816

268608

3

2

3

Question
Choice A
Which of the following reaction turbine Fixed and moving
components listed converts thermal
blades
energy into kinetic energy.
Which of the following refractory
Castable insulation
materials can provide a straight backing
surface for insulation block where minor
casing warp has occurred?

Choice B
Fixed blades only

Choice C
Moving blades only

Choice D
nozzle diaphragms

Insulating cement

Castable fireclay

Chrome castable

Which of the following refractory
materials contains a hydraulic-setting
binder and develops strength without
needing to be heated in a manner
similar to concrete?
Which of the following refractory
materials is preferred for small repairs,
particularly where standard size brick or
tile cannot be used?
Which of the following repairs should be
made to a badly warped boiler tube?

Plastic fireclay

Plastic chrome ore

Castable fireclay

Refractory mortar

Castable fireclay

Plastic fireclay

Plastic chrome ore

Chrome castable

Heat the tube and
use a soft mallet to
straighten it.

Use a hydraulic jack Assure that the
Replace the tube
to cold bend the
warped tube does
with a spare, if
tube.
not touch adjacent
available, or plug it.
tubes and then reroll
it in the header.

Which of the following represents a
significant system limitation to be aware
of when a burner management system
is operated in the "Manual" mode?

Some boiler safety
interlocks are
bypassed when the
boiler is being fired in
"Manual" mode.

Which of the following represents a
significant system limitation to be aware
of when a burner management system
is operated in the 'HAND' mode?

Some boiler safety
interlocks are
bypassed when the
boiler is 'HAND'
fired.

Which of the following represents one
of the designed functions of reduction
gears?

Change rotary
motion into linear
motion.

The burner is not
capable of
maintaining a high
firing rate when the
boiler is in "Manual"
mode.
The burner is not
capable of
maintaining a high
firing rate when the
boiler is in the
'HAND' mode.
Combine multiple
speed inputs into a
single low speed
output.

1

2

1

1

Steam Plants

195

The flame failure
alarm cannot
function when the
boiler is in "Manual"
mode.

The burner
sequence control is
fully automatic even
in the "Manual"
mode.

The flame failure
alarm cannot
function when the
boiler is 'HAND'
fired.

The burner
sequence control is
fully automatic even
in the 'HAND' mode.

Illustration

To amplify low speed Utilize a single
to high speed.
engine input and
convert to multiple
propeller output.

SP091813

ABS

VER

251100

4

256346

1

257204

1

257001

267222

267803

1

2

2

Steam Plants

Question
Choice A
Which of the following represents one Water must be
of the most important considerations in directed toward the
the design and location of the boiler
downcomers.
internal feed pipe?

Illustration
Choice B
Choice C
Choice D
Feed water must be Thermal shock to the Holes must be drilled
directed to the swash boiler drum must be in both the upper and
baffles.
avoided.
lower portion of the
internal feed pipe.

Which of the following represents the
function of the diffuser used with a
mechanical atomizing oil burner?
Which of the following represents the
proper color of the flame end farthest
from the boiler burner during normal
operations?
Which of the following statements about
boilers is correct?

Provide flame
stability at the
atomizer tip.
Bright yellow or
orange

Control the amount
of secondary
combustion air.
Dark brown

Complete the
vaporization of the
fuel for combustion.
Light brown haze

Finely divide the fuel
particles into a coneshaped spray.
Dazzling white

A hot boiler will
continue to generate
steam after the fires
are secured.

No boiler will
continue to generate
steam after the fires
are secured.

The water level in a
properly operated
boiler will not shrink
or swell.

Loss of water will not
harm a boiler if the
water level can be
restored.

Which of the following statements about Any lube oil pump
gravity type lube oil systems is correct? failure causes
immediate damage
to turbine bearings.
Which of the following statements best The purified oil is
describes the actions occurring to the
only thrown outward
oil as it flows through a disk type
and away from the
centrifugal purifier?
spindle of the
machine.

The discharge from
the gravity tanks
flows to the lube oil
pump suction.
Water, along with
most of the dirt and
sludge, is discharged
past the discharge
ring, located at the
top of the bowl.

Gravity tank overflow Gravity tanks are
lines are lead directly fitted with an
to the lube oil sump. overflow alarm.

196

Most of the dirt and
sludge is forced to
accumulate on the
vertical surfaces of
the bowl.

As the dirty oil flows
down through the
distribution holes in
the disks, the high
centrifugal force
causes the water to
move outward.

SP091813

ABS

VER

250801

1

266005

267823

2

1

Question
Which of the following statements
concerning boiler steam drum surface
blow piping is correct?

Choice A
Usually the surface
blow pipe is
perforated with holes
along its top surface;
however, when a
scum pan is also
employed, the holes
are located along the
bottom of the pipe
surface.

Choice B
The centerline of the
pipe is normally
situated at a distance
from the bottom of
the steam drum
equal to
approximately one
fourth the diameter
of the drum.

Choice C
Choice D
To ensure adequate All of the above.
blow down, the
aggregate cross
sectional area of
these perforated
holes must be equal
to approximately
twice the cross
sectional area of the
pipe.

Which of the following statements
concerning the design of balanced
throttle valves is correct?

They commonly use
a conventional valve
disc and a balance
piston.

They commonly use
two parallel seats
and a balance
cylinder.

The ahead throttle
valve normally
utilizes a guarding
valve.

Which of the following statements
concerning the operation of a lube oil
purifier is correct?

They should be
operated as clarifiers
for optimum moisture
removal.

Both ahead and
astern valves
normally have a
positive opening
tendency.
They should be
operated as slowly
as possible to ensure
a long service life.

The safety valve
operates with a
"huddling chamber"
principle.

All of the above.

The gears are
capable of free
motion, neither
supporting nor being
supported radially by
other gears.

A pinion is capable
of free axial motion,
mating with a fixed
double helical gear
which establishes its
position in the gear
train.

Which of the following statements
concerning the safety valve shown in
the illustration is correct?
251312

268813

2

3

Steam Plants

They should be
operated at
maximum design
speed and
recommended
operating capacity.
When the drop lever When a gag is
is raised, the safety placed on the valve,
valve spring is
it should be installed
compressed.
only finger tight to
prevent damage to
the spindle.

Which of the following statements
The gears are not
defines the term 'axial float' in reference subject to excessive
to reduction gears?
tooth loads due to
mismatching of the
journal bearing
halves.

The gears cut with a
single helical profile
have axial thrust
eliminated.

197

Illustration

They should not be
primed with water
when operated as a
separator.

SG-0018

SP091813

ABS

VER

268813

4

266003

250008

1

2

268800

5

253700

3

254511

1

Steam Plants

Question
Choice A
Which of the following statements
Idler gears reduce
defines the term 'axial float' in reference axial loads when
to reduction gears?
reversing rotation

Choice B
The gears cut with a
single helix have
axial thrust
eliminated.
Which of the following statements
Excessive centrifugal Excessive centrifugal
describes how the main propulsion
force causes a
force causes spring
turbine over speed relay initiates closing spring loaded weight loaded fly balls to
of the throttle valve?
to trip a valve latch. actuate a control
lever.

Which of the following statements
describes the effects that dissolved
oxygen has on boiler internal surfaces
with changes in temperature and
pressure?

It decreases the
corrosive effect when
both pressure and
temperature are
increased.

It increases the
corrosive effect with
increased pressure
and decreases its
corrosive effect with
increased
temperature.
Which of the following statements
Support the weight of Absorb the
describes the function of a ship's
the reduction gears. transmitted power
propulsion plant main reduction gear
when radial thrust is
thrust bearing?
developed.
Which of the following statements
All condensate and Only the section
describes those portions of the piping
feed piping except
between the
maintained under positive pressure
for a short section
condensate pump
when a pressure-closed feed system is between the
and deaerating feed
in operation?
condenser and
tank.
condensate pump.
Which of the following statements is
The regulator
The regulator
correct concerning the operation of the maintains the flow of controls the level of
level or drain regulator associated with steam into the first
condensate collected
the feed water heater shown in the
stage heater of this in the drain cooler
illustration is correct?
unit.
section.

198

Choice C
Choice D
The gears are
The gears are
capable of free radial capable of free axial
motion
motion
Excessive speed
causes an oil pump
to develop sufficient
pressure to open a
spring loaded relay
valve which tends to
close the steam
control valve.
It increases the
corrosive effect with
lowered pressure
and increases its
corrosive effect with
increased
temperature.
Absorb the axial
thrust transmitted
through the shaft
from the propeller.
Only the section
between the
deaerating feed tank
and the boiler.

Excessive speed
causes an increase
in lube oil control
temperature which
actuates a solenoid
oil dump valve.

The regulator
controls the flow rate
of condensate
leaving the feed
water outlet.

The regulator
controls the volume
of condensate
leaving the gland
exhaust condenser.

Illustration

Temperature and
pressure have no
effect on the
corrosive effect of
dissolved oxygen.

To absorb only the
thrust developed by
the high pressure
turbine.
Only the section
between the
condenser and the
condensate pump.

SG-0025

SP091813

ABS

VER

261223

1

267804

253702

210010

256808

2

1

Choice B
Only a small portion
of the thrust
produced is counter
balanced by the
action of a dummy
piston.
The size ring dam
While all ring dams
used depends on the have the same inside
viscosity of the oil
diameter, the outside
being purified.
diameters vary.

Choice C
The thrust is
minimized by
equalizing holes
drilled in the turbine
wheels.

Which of the following statements is
correct regarding the selection of the
proper size ring dam for a tubular-type
lube oil purifier?

Ring dams of larger Satisfactory
sizes are indicated
purification is
by smaller numbers. obtained when the
ring dam is the
largest size possible,
and no oil is present
at the water
discharge.
Open the pump
Secure all drains
suction valve prior to prior to admitting any
admitting steam to
steam to avoid
the turbine.
damage to traps.

Which of the following statements is
correct regarding the start-up operation
of a non-condensing turbine-driven feed
pump?

Keep the steam
exhaust valve closed
until steam is applied
to ensure that the
auxiliary exhaust line
pressure does not
drop.

Keep the pump
casing vent valve
closed until flow is
established through
the pump.

Which of the following statements is
NOT one of Newton's laws?

A body at rest tends For every action
to remain rest and a there is an equal and
body in motion tends opposite reaction.
to remain in motion.

Which of the following statements is
true concerning a photocell flame
scanning system?

The photocell
requires a large
amount of voltage.

1

2

Steam Plants

Illustration
Choice D
The thrust is
transmitted to and
absorbed by the high
speed pinion and
gear.

Question
Choice A
Which of the following statements is
Most of the thrust
correct regarding axial thrust in a high produced is counter
pressure velocity-compounded turbine? balanced by the
action of a dummy
piston.

The scanner head
must be adjusted to
sight the sensitivity
link.

199

If the pressure is
constant, the volume
of an enclosed dry
gas varies directly
with the absolute
temperature.

An imbalance of
force on a body
tends to produce an
acceleration in the
direction of that force
which is directly
proportional to the
applied force and
inversely proportional
to the mass of the
body.
The scanner works The scanner window
in conjunction with
must be isolated
the burner fuel oil
from the forced draft
(solenoid controlled) fan air.
shut off valves.

SP091813

ABS

VER

259741

1

267211

256336

267801

260001

1

1

6

1

Steam Plants

Question
Which of the following statements is
true concerning boiler inspections?

Choice A
The marine inspector
may require any
boiler to be drilled to
determine its actual
thickness any time
its safety is in doubt.

Choice B
At the first inspection
for certification after
a water-tube boiler
has been installed
for ten years, it shall
be gauged by drilling
to determine the
actual extent of
deterioration.

Choice C
If the thickness
found as a result of
gauging is less than
original thickness,
the boiler must be
condemned.

Choice D
Any user of a
nondestructive
testing device must
demonstrate that
results with an
accuracy of plus or
minus one percent
are consistently
obtainable.

Which of the following statements is
true concerning lube oil coolers?

The temperature of
the oil is less than
that of the cooling
water.
The annular groove
imparts the initial
swirling motion to the
oil.

The pressure of the The pressure of the
oil is less than that of oil is greater than
the cooling water.
that of the cooling
water.
The operating range, The bore of the
or 'turndown ratio', of sprayer plate orifice
this type of burner is has a standard drill
almost unlimited.
size of "38".

Magnets are
installed in the tube
sheets to remove
metal particles.
All of the above.

Which of the following statements is
true concerning the centrifuging of
lubricating oil?

Centrifuging is more
effective with
inhibited oils than
straight mineral oils.

Centrifuging is more
efficient when the oil
is preheated prior to
centrifuging.

Which of the following statements is
true concerning the coupling shown in
the illustration?

It allows for any
misalignment
between the main
turbine and the
second reduction
gear.

It is commonly used It is suitable for use
between the first
on small auxiliary
reduction pinion and turbines only.
the second reduction
gear.

Centrifuging will
purge the oil of
various
contaminants,
including acids and
alkalis.
It can be used to
connect the main
turbine to the highspeed pinion.

Which of the following statements is
true concerning the burner atomizer
shown in the illustration?

200

Silicones are water
soluble and easily
removed by
centrifuging.

Illustration

SG-0022

SE-0001

SP091813

ABS

VER

250025

1

Question
Which of the following statements is
true concerning the information
tabulated in the table?

Which of the following statements is
true concerning the lube oil system
shown in the illustration?
267227

253501

256602

250121

260802

3

2

2

2

1

Steam Plants

Choice A
At 185.3 psig
(1366.4 kPa), the
saturation
temperature of a
mixture of water and
steam is 377.51°F
(192°C).

Choice B
When one pound of
water changes to
one pound of steam
at 200 psia (1378.8
kPa), its volume
increases 124.41
times.

Choice C
Choice D
If one pound of
All of the above.
steam at 250 psia
(1723.5 kPa)
condenses to one
pound of water it will
give up 843 BTU's
(889.4 kJ) while
changing state.

The gravity tank
directly provides the
normal supply of oil
to the turbines and
gears.

The gravity tank
overflow line leads
directly to the lube oil
sludge tank.

The three-way
temperature control
valve bypasses
cooling water around
or through the
lubricating oil cooler
to maintain the
desired oil
temperature.
The inner tube of the
generator is open to
the steam and water
in the steam drum.

The drains from lube
oil coolers can be
directed back to the
main sump, the
sludge tank or the
lube oil purifier.

The valve will
automatically reopen
from a low water
shutdown once water
level is restored.

The valve will
automatically close if
boiler pressure drops
20% below normal
working pressure.

The steam whistle
operates on 140 psi
steam.

All of the above.

A steam deflector is
provided between
the astern element
and the ahead
stages of the LP
turbine.

The ahead rotor can
be classified as a
helical flow, Parsons
type turbine

Which of the following statements is
A failure in the
true concerning the operation of a boiler regulator pressure
thermo-hydraulic feed water regulator? actuating system
opens the feed
valve wide.
Which of the following statements is
The valve should
true concerning the operation of the
secure the fires if the
automatic shut down solenoid valve in main propulsion
the fuel oil service manifold of an
turbine over speeds.
automatically fired boiler?

The regulator
maintains constant
water level
throughout all boiler
load ranges.
The valve must be
manually reset to the
open position prior to
relighting burners
after a safety
shutdown.
Which of the following statements is
The boiler soot
Air ejectors operate
true concerning the piping system
blowers operate with on 143 psi steam.
shown in the illustration?
desuperheated
steam.
Which of the following statements is
The low pressure
The astern element
true concerning the turbine shown in the turbine is designed is of the Curtis type
illustration?
with reaction type
consisting of two
stages
three-row stages

201

Illustration

SG-0004

SE-0011

The outer tube of the
generator transfers
heat to the inner tube
of the closed system.

SG-0005

SE-0016

SP091813

ABS

VER

263001

2

259280

267201

266001

251001

250409

250721

2

4

2

1

6

2

Steam Plants

Choice A
The second
reduction worm gear
always rotates
whenever the
turning gear motor is
in operation;
regardless of the
position of the
engaging handle.
Which of the following statements is
A reserve is
true concerning the use of hydrazine in maintained by
boiler water treatment?
continually adding it
to the condensate
and feed water
system rather than
the boiler water.
Which of the following statements is
Regulating the inlet
true regarding lube oil coolers used for water flow to a lube
main steam propulsion systems?
oil cooler may result
in air binding of the
water side.
Which of the following statements
Friction as steam
represents an example of a throttling
passes over the
loss in a turbine?
walls of the nozzles.

Choice B
The turning gear
motor coupling is
engaged by the
locking device.

Illustration
Choice C
Choice D
In order for the
The first reduction
'turning gear
gear meshes directly
engaged' indicating with the bull gear.
lamp to be lit, the
switch must be of the
SE-0015
normally closed type.

It removes free
oxygen from the
boiler without
significantly
increasing total
dissolved solid
content.
A lube oil cooler is
typically constructed
as a cross-flow type
heat exchanger.

It aids in maintaining All of the above.
the pH of the boiler
water within the
prescribed limits.

Steam leaving the
last stages of the
turbine.

The coolers may be
bypassed when
operating in warm
sea water
temperatures.
Steam passing
through a steam
admission valve.

Which of the following statements
represents one operational
characteristic of a cyclone steam
separator?

Unit reduces the
circulation of the
steam and water
mixture in the boiler.

Unit imparts a
rotational motion to
the steam and water
mixture.

Steam is forced to
Water is forced
the outer side of the upward by centrifugal
separator by
force.
centrifugal force.

Which of the following statements
represents the advantage of castable
insulation over either insulating brick or
insulating block installations?
Which of the following statements
represents the advantage of using a
small diameter boiler tube over a larger
diameter tube?

The speed and
economy of
installation.

Its resistance to high Its high comparative Its comparative
temperatures.
strength.
greater insulating
value.

Question
Which of the following statements is
true concerning the turning gear rotor
arrangement shown in the illustration?

Small diameter tubes Small diameter tubes
reduce gas
reduce the heating
turbulence in the
surface area.
tube banks.

202

The lube oil usually
flows thru the tubes
and the cooling
water around the
tubes.
Steam leaking over
the tips of fixed and
moving blades.

Small diameter tubes Small diameter tubes
are less affected by provide for greater
the insulating
heat transfer rates.
properties of soot.

SP091813

ABS

VER

250721

11

250721

259764

254503

250409

250409

Question
Which of the following statements
represents the advantage of using a
small diameter boiler tube over a larger
diameter tube?

Choice A
Choice B
Small diameter tubes Small diameter tubes
have a greater ratio reduce the heating
of generating surface surface area.
area to the volume of
contained water

Illustration
Choice C
Choice D
Small diameter tubes Small diameter tubes
are less affected by provide for greater
the insulating
heat transfer rates.
properties of soot.

Which of the following statements
represents the advantage of using a
small diameter boiler tube over a larger
diameter tube?

Small diameter tubes Small diameter tubes
result in lower
reduce the heating
outside tube metal
surface area.
temperatures.

Small diameter tubes Small diameter tubes
are less affected by provide for greater
the insulating
heat transfer rates.
properties of soot.

Which of the following statements
represents the Coast Guard Regulation
regarding a boiler installation in which
the superheater outlet temperature
exceeds 850°F?

Safety valves are to
be set at 110% of the
highest setting of
the safety valves on
the drum.

Visible and audible
alarms indicating
excessive superheat
shall be provided.

All mountings,
fittings, valves, or
other superheater
attachments must be
of malleable cast
iron.

Which of the following statements
represents the function of a turbine
gland exhaust condenser?

Assists in preheating
the condensate
before it enters the
DC heater.

Recovers
condensate formed
at the gland seal
exhaust leak off.

Directs the gland
exhaust from the
turbine sealing
glands to the air
ejector suction.

Provides structural
stability.

1

Which of the following statements
represents the function of insulating
brick?

2

Which of the following statements
represents the function of insulation
block?

It is used to protect
firebrick from
maximum
temperatures.

12

1

1

Steam Plants

A device, actuated
by inlet static
pressure and
designed to function
by the bursting of a
pressure retaining
disk, must be fitted
at the outlet of the
superheater.

Recovers
condensate from the
gland leakage
around the ahead
and astern throttle
valves.
Acts as a gas-side
Provides the first
Acts as backup
layer at high
layer at the inside of insulation behind
temperature areas in inner casing.
firebrick, plastic
D-type boilers.
refractory, or
castable refractory.
It is generally used
It is used to provide Typically used as a
as the first layer on structural stability.
gas-side layer at low
the inside of inner
temperature areas in
casings.
D-type boilers.

203

SP091813

ABS

VER

268613

4

261205

1

250703

4

250718

1

268815

3

250303

2

268702

2

Steam Plants

Question
Which of the following statements
represents the function of the center
groove machined on a double-helical
gear?

Choice A
It allows the gears
slight axial
movement without
gear damage.

Choice B
It allows a path for oil
to escape regardless
of the direction of
rotation.

Illustration
Choice C
Choice D
It prevents excessive It is used to distribute
axial thrust loads
oil to the gear teeth.
from developing on
the teeth.

Which of the following statements
represents the function the nozzle
assembly performs in an impulse
turbine?

Converts the steam's
thermal energy into
kinetic energy by
increasing its velocity
and directing it
against the rotor
blades.

Provides an area
where the steam is
prevented from
expanding prior to
being directed
against the rotor
blades.

Increases the
velocity of the steam
without a pressure
drop across the
diaphragm.

Converts the
potential energy of
steam into thermal
energy by increasing
its pressure and
directing it against
the turbine blades.

Which of the following statements
represents the major difference
between a boiler drum and a header?

The temperatures at The number of tubes The size of each is The size of the tubes
which they are
permitted to enter a significantly different. permitted to
operated.
drum or header.
penetrate the drum
or header.
Which of the following statements
To allow access into To allow access for To provide access
To allow access into
represents the primary function of hand the steam and water cleaning in the stack. for cleaning out the the headers.
holes used on a boiler?
drum.
firebox.
Which of the following statements
A flat film of oil is
A flat film of oil can A wedge shaped film A wedge shaped film
represents the principle of operation of more readily formed carry heavier loads of oil absorbs less
of oil is more readily
the Kingsbury type thrust bearing?
and maintained than than a wedge
heat than a flat oil
formed and
a wedge shaped oil shaped oil film.
film.
maintained than a
film.
flat oil film.
Which of the following statements
To ensure an airtight To accommodate the To compensate for To allow for unequal
represents the purpose of boiler sliding seal between the
changing length of
deflection of the hull expansion between
feet?
boiler inner and outer the water drum as it in way of the boiler
the wrapper and tube
casings.
expands or contracts supports.
sheets.
with temperature
changes.
Which of the following statements
To prevent oil from
represents the reason why the Babbitt backing up in the
of a turbine journal bearing is relieved at supply line.
the point of oil entry along the horizontal
joint?

To permit oil to
discharge through
the rear of the
bearing.

204

To prevent hydraulic To permit the rotor
pressure buildup
journal to draw oil
when the journal
around the shaft.
rotates.

SP091813

ABS

VER

266409

1

265200

2

250101

2

250101

1

250101

11

267600

1

268709

1

268602

268800

261000

1

1

2

Steam Plants

Choice C
The pressure
differential requires
the installation of a
special biasing
spring to open the
valves.
It assists in opening
the governor control
valve while starting
the unit.

Illustration
Choice D
The pressure
differential assists in
seating the valves
when the lifting beam
is lowered.

High pressure
evaporator

Boiler air heaters

Boiler steam
atomizers

Main feed pump

Low pressure
evaporator

Air ejectors

Boiler steam
atomizers

Steam fuel oil
atomizers

Deaerating feed
water heater

Air ejectors

Standby lube oil
pumps

Ring lubricated

Disk lubricated

Pressure lubricated

Oil whip lubricated

Ring-oiled, Babbittfaced, spherical seat,
shell
Which of the following types of bearings Babbitt lined split
are used for the reduction gears in a
shell
marine steam turbine installation?

tapered roller, split
type radial

Segmental, pivoted- Rigidly mounted,
shoe thrust
radial sleeve

Lignum vitae lined
precision

Bronze lined cutless Sintered bronze
bushings

Which of the following types of bearings
is designed to limit end movement and
carry loads applied in the same
direction as the shaft axis?
Which of the following types of main
propulsion turbines is most likely to
require a dummy piston or cylinder
arrangement to counterbalance axial
thrust?

Segmental pivotedshoe thrust bearing

Self-aligning radial
bearing

Question
Which of the following statements
represents the significance of the
differential pressure existing between
the nozzle block and steam chest of a
turbo generator equipped with a lifting
beam mechanism?
Which of the following statements
would best describe the purpose of
operating the hand lube oil pump on an
auxiliary turbo-generating unit?

Choice A
The pressure
differential
necessitates the use
of a special balance
piston.

Choice B
The pressure
differential eliminates
the possibility of
valve binding in the
lifting beam.

It supplements the
main lube oil pump
flow while paralleling
the generators.

It empties the
governor control
reserve prior to
shutting down.

Which of the following systems can be
supplied by the auxiliary exhaust
system?
Which of the following systems can
normally be supplied by auxiliary
exhaust steam?
Which of the following systems is
designed to use auxiliary exhaust
steam?
Which of the following types of bearing
lubrication schemes can carry the
highest unit loading?
Which of the following types of bearings
are used as line shaft bearings?

Main feed pump

Rigidly mounted
reduction gear
bearing

Double flow impulse Multistage impulse
turbine
turbine

205

It permits the
changeover of lube
oil filters.

Spherically-seated
radial bearing

Double flow reaction Single flow reaction
turbine
turbine

SP091813

ABS

VER

261000

5

268303

268414

1

1

252812

1

256345

2

259773

1

268707

1

259360

1

257110

3

Steam Plants

Question
Which of the following types of main
propulsion turbines is most likely to
require a dummy piston or cylinder
arrangement to counterbalance axial
thrust?
Which of the following would cause the
dowel or locking lip of a split-type,
precision insert, main bearing to shear
and allow the bearing to rotate with the
journal?
Which of the following would contribute
to the formation of an oil and water
emulsion, in addition to acid formation?

Choice A
Choice B
Double flow impulse Multistage impulse
turbine.
turbine.

Choice C
Choice D
Double flow reaction Single flow reaction
turbine.
turbine.

Unequal torque to
any two adjacent
bearing bolts

Excessive bearing
bolt torque

Insufficient bearing
crush

Short periods of
above normal
operating speeds

Aeration, agitation,
and heat

Solid insoluble
particles, aeration,
and heat

Water and solid
insoluble particles

Water, agitation, and
heat

Lower than normal
auxiliary steam
temperature
Rotary cup

Higher than normal Lower than normal
fuel oil consumption fuel oil consumption

Pneumatic test
pressure

Coast Guard Symbol Minimum wall
thickness

Roller bearings

Spring bearings

Spherically seated
bearings

Sodium chloride

Deactivated
hydrazine

Silica gel

Which of the following would indicate a Higher than normal
moderate leak in the desuperheater?
auxiliary steam
pressure
Which of the fuel atomizers listed has
Steam assist
the greatest firing range or turndown
ratio?
Which of the items listed is required by Hydrostatic test
Coast Guard Regulations (46 CFR Part pressure
54) to be stamped on a pressure
vessel?
Which of the journal bearings listed
Ball bearings
most easily accommodates the minor
turbine shaft misalignment?
Which of the listed absorbing agents
Sodium hydroxide
could be used in a boiler during a dry
lay up period?
Which of the listed actions should be
The valve must be
carried out with the superheater vent
wide open all the
valve during the time steam is being
time until the boiler
raised in a boiler?
is on the line.

Return flow

The valve may be
The valve may be
closed when all air is partially throttled as
vented.
the pressure
increases until the
boiler is on the line at
which time it is
closed.

206

Illustration

Straight-through flow

The valve need only
be open if the
superheater
temperature
approaches 850°F.

SP091813

ABS

VER

266402

2

250703

256000

250701

254404

254502

259000

259000

5

2

8

1

1

3

2

Steam Plants

Question
Which of the listed actions will occur
when there is an increase in load on a
ship service generator equipped with a
centrifugal type hydraulic governor?

Choice A
The governor
weights move
outward.

Which of the listed boiler components is Downcomer
used to equalize the distribution of
water to the generating tubes and
provide an area for the accumulation of
loose scale and other solid matter
present in the boiler water?

Choice B
Choice C
Choice D
The operating piston More oil will enter the Steam flow to the
is forced to move
operating cylinder
turbine decreases.
lower.
(O).

Steam drum

Which of the listed characteristics of
Flash point
Fire point
fuel oil establishes the danger point as
far as transferring, pumping, and firing
procedures are concerned?
Which of the listed components is used Superheater support Control
to protect the boiler superheater against tubes
desuperheater
the radiant heat of the furnace?

Water drum only

Water drum and
headers

Viscosity

Specific gravity

Screen tubes

Generating tubes

Which of the listed components would
be considered the dividing line
separating the condensate system from
the feed water system?
Which of the listed conditions aids in
directing gland leak off steam from the
low pressure propulsion turbine to pass
through the gland exhaust condenser?

Main condenser

Deaerating feed tank Main air ejectors

Steam pressure from Steam pressure from Compressed air in
the low pressure
the high pressure
the air pilot.
turbine.
turbine.

The use of a gland
exhauster fan.

Which of the listed conditions can
cause excessively high superheater
outlet steam temperature in an
automated boiler?
Which of the listed conditions can
cause high superheater outlet steam
temperature in an automated boiler?

High water level in
the steam drum.

Excessive heat
Insufficient excess
transfer in the control air.
desuperheater.

Excessive air flow
through the furnace

High water level in
the steam drum.

Excessive heat
Insufficient excess
transfer in the control air.
desuperheater.

Operating with a
bypassed
economizer.

207

Illustration

SE-0009

Boiler drum

SP091813

ABS

VER

257301

1

261403

Choice A
Collapse of steam
bubbles

Which of the listed conditions could
occur if during start-up the rotor
illustrated shifts radially?

The teeth in
segments "A" could
be sheared off as
they rubbed against
the sides of the
machined rotor
lands.

1

254400

1

258002

3

256807

1

266201

Question
Which of the listed conditions causes
shrinkage in boiler water levels?

2

Which of the listed conditions will
Priming in the boiler
always result in dissolved oxygen being
carried over from the main condenser?

Fluctuating pressure Carbon deposits on
in the windbox.
the register doors.

Dark streaks in the
burner flame.

Which of the listed devices may trip due
to total flame failure in both boilers of an
automated plant?
Which of the listed items are the two
most commonly used opposing forces
involved in the operation of a constant
pressure boiler feed pump governor?

Individual burner
solenoids

Main turbine throttle
valve

2

252201

3

Which of the listed mediums should be Heated freshwater
used when water washing a boiler?

259262

1

Steam Plants

Which of the listed methods can be
used to blow down a boiler without
securing the fires?
Which of the listed methods would be
MOST effective when repairing a steam
cut on a seating surface of a
superheater hand hole plate?

Main fuel header
solenoids

Steam inlet pressure Pilot valve steam
Steam inlet pressure
and pump discharge pressure and control and adjusting spring
pressure.
valve spring
tension.
pressure.

252201

2

Choice C
Sudden increase in
feed water
temperature
No appreciable
Enough frictional
damage would result heat would be
as the segments "A" produced, even in
would simply move that short period of
outward against
time, to cause
spring compression. distortion and
ultimate scoring of
the shaft.
Taking on makeup
Dumping auxiliary
feed
exhaust steam to the
main condenser

Which of the listed conditions would
indicate a dirty atomizer sprayer plate?

Which of the listed mediums should be Heated freshwater
used when water washing a boiler?

252002

Choice B
Excessive steam
bubbles

Choice D
Sudden decrease of
drum pressure
None of the above
as the operator
would be fore
warned of this
situation through the
action of the
squealer ring "D".

Dazzling white
incandescent burner
flame.
All of the above

Pump discharge
pressure and
adjusting spring
compression.

Heated saltwater

Cold saltwater

Cold freshwater

Cold condensate

Warm condensate

Steam drum surface Bottom blow from
blow.
the mud drum.

Blow down the rear
water wall header.

Blow down the front
water wall header.

Filling the cut by
welding and then
grinding it smooth.

Grinding the seating Refacing the surface
surface and installing and over torquing the
an oversized gasket. hand hole plate.

208

SE-0006

Excessive DC heater
temperature

Cold freshwater

Filling the cut with
iron cement or
plastic steel.

Illustration

SP091813

ABS

VER

252301

1

268200

2

251555

5

253400

2

266400

268815

266400

251602

1

4

2

1

Steam Plants

Question
Which of the listed operating practices
is considered as safe, and should be
followed when opening and inspecting
the waterside of a boiler?

Choice A
Choice B
Open the water drum Wire all valves
manhole before
closed that connect
opening the steam
to other boilers.
drum manhole.

Choice C
Remove hand hole
plate dogs with a
slugging wrench.

Choice D
Ventilate the
waterside until
completely dry.

Which of the listed operational checks
should be made "continuously" on the
main propulsion reduction gears?

Check radial bearing Inspect alignment
wear.
between gears and
turbine.

Check teeth for
pitting and scuffing.

Check bearing lube
oil temperatures.

Which of the listed operational
precautions is necessary before blowing
tubes?
Which of the listed order of valves
represents the proper installation of the
main feed water supply line to a marine
propulsion boiler?
Which of the listed parts illustrated in
the turbo generator governing system,
provides the follow-up to prevent the
nozzle valves from cycling between the
fully open and fully closed positions,
with each variation in turbine speed?

Increase forced draft Open all drains in
fan speed.
soot blower steam
supply piping.
Regulator, stop, stop- Stop-check, stop,
check
regulator

Thoroughly warm all All of the above.
soot blower steam
supply piping.
Stop, regulator, stop- Stop-check,
check
regulator, stop

D

H

O

Illustration

E

SE-0009

Which of the listed parts of a Kingsbury Collar
thrust bearing tilts to permit the
formation of a wedge shaped film of oil?

Base ring

Dowel disk

Shoes

Which of the listed parts shown in the
Synchronizer
illustration of the turbo-generator
governing system, provides the followup motion to prevent the nozzle valves
from cycling between the fully open and
fully closed positions with each variation
in turbine speed?
Which of the listed procedures is the
All cracks must be
most important factor to take into
completely filled.
consideration when making repairs to
the refractory surrounding the burner
openings?

Operating cylinder

Main speed governor Restoring linkage

SE-0009

Finished repair
surfaces must be
smooth.

209

Design refractory
cone angle must be
maintained.

Plastic firebrick must
be used.

SP091813

ABS

VER

263009

2

250407

1

250407

2

250408

1

250408

251607

250405

250409

4

1

5

7

Steam Plants

Question
Which of the listed procedures should
be followed when raising vacuum on the
main propulsion plant prior to getting
underway?

Choice A
Start the condensate
and circulating
pumps, engage the
turning gear, start
the lube oil system,
then start the firstand second-stage air
ejectors and the
gland sealing.

Choice B
Start the condensate
and circulating
pumps, start the lube
oil system, start the
air ejectors and the
gland sealing
system, and engage
the turning gear.

Choice C
Start the lube oil
system, engage the
turning gear, start
the condensate and
circulating pumps,
start the gland
sealing system and
second-stage air
ejector.

Illustration
Choice D
Start the lube oil
system, start the
second-stage air
ejector and the gland
sealing system, start
the condensate and
circulating pumps,
and start the turning
gear.

Which of the listed refractory materials
can be used in an area directly
exposed to the highest heat in the
furnace?
Which of the listed refractory materials
is capable of providing structural
stability?
Which of the listed refractory materials
is composed of wool fibers and clay
binders?
Which of the listed refractory materials
may be used with other machinery
insulation arrangements outside of the
boiler?
Which of the listed refractory materials
should be used for patching a burner
front formed of plastic, castable, or tile?

Firebrick

Insulating brick

Insulating block

Baffle mix

Chrome castable

Firebrick

Insulating brick

Insulating block

Insulating cement

Castable fireclay

Chrome castable ore All of the above

Castable fireclay

Refractory mortar

Insulating cement

Castable insulation

Plastic chrome
insulation

Chrome castable
insulation

Air-setting mortar

Plastic fireclay

Which of the listed refractory materials Castable fireclay
will develop required strength only after
being heated at a temperature of
1095°C (2000°F) or higher?

Plastic fireclay

Castable insulation

Chrome castable

Which of the listed refractory materials Firebrick
would NOT be suitable for use in a wall
previously provided with 2-inch thick
insulation block, or in the construction
of floors, or as a gas-side layer?

Plastic chrome ore

Castable insulation

All of the above

210

SP091813

ABS

VER

251606

2

250141

1

250719

3

251303

1

256506

6

252002

253501

253501

261005

1

1

5

1

Steam Plants

Question
Which of the listed statements is true
concerning the application and use of
plastic fireclay furnace refractory?

Choice A
The plastic fireclay
refractory is
especially resistant
to slag buildup.

Choice B
The plastic fireclay
must be allowed to
be completely air dry
to achieve maximum
strength.

Choice C
Choice D
Vent holes should be All of the above.
punched on
approximately twoinch centers to
provide for ready
escape of trapped
vapor during heating.

Which of the listed systems would be a Galley steam tables
potential source for the high pressure
drain system?
Which of the listed tubes provides
Water screen tubes
circulation to the water wall tubes?
Which of the listed types of safety
Huddling chamber
valves is shown in the illustration?
type
Which of the listed types of strainers
Duplex
are installed between the fuel oil heater
and the burner manifold?
Which of the methods listed would be
Filling the cut by
most effective in repairing a steam cut welding and then
on a seating surface of a superheater
grinding it smooth.
hand hole plate?
Which of the operating principles listed A failure of the
would apply to a single-element, thermo- regulator pressure
hydraulic, feed water regulator?
actuating system
closes the valve.

Laundry steam
pressing machines

Fuel oil tank heating Steam systems
coils
operating in excess
of 150 psi
Downcomers
Generating tubes

Which of the operating principles listed A failure of the
would apply to a single-element, thermo- regulator pressure
hydraulic, feed water regulator?
actuating system,
such as from a leaky
bellows, will tend to
close the feed water
valve.
Which of the parts listed for a reaction Fixed nozzles
turbine serve the same function as the
nozzles of an impulse turbine?

Risers
Jet flow type
Magnetic

Nozzle reaction type Pressure-loaded
type
Simplex
Self-cleaning

Filling the cut with
iron cement or
plastic steel.

Grinding the seating Refacing the surface
surface and installing and over torquing the
an oversized gasket. hand hole plate.

The regulator
maintains a constant
water level
throughout the boiler
load range.

The cooling fins on
the generator
prevent the formation
of steam in the
closed system.

The pressure in the
inner tube acts upon
the bellows of the
regulator.

The regulator is
designed to always
maintain a constant
water level
throughout the entire
boiler load range.

The water side line
leading to the inner
tube is normally
insulated.

The pressure in the
inner tube acts upon
the bellows of the
regulator.

Moving nozzles

Moving blades only

Fixed blades and
moving blades

211

Illustration

SG-0018

SP091813

ABS

VER

250120

1

250724

4

251701

1

250303

253010

3

3

258207

1

256402

2

254104

1

256003

1

255600

1

258204

4

Steam Plants

Question
Which of the piping systems listed is
shown in the illustration?
Which of the precautions listed should
be taken prior to blowing down a boiler
water wall header?
Which of the precautions listed should
be taken when gagging a boiler safety
valve?

Choice A
Auxiliary exhaust

Choice B
Auxiliary steam

Choice C
Butterworth

Choice D
Main feed

Relieve the pressure
and cool down the
boiler.
Do not allow the gag
to contact the safety
valve stem.

Raise the water level
above the surface
blow.
Tighten the gag only
with the special
wrench supplied with
the gag.

Which of the problems listed could
occur if the sliding-foot bearing
surfaces, shown in the illustration, are
not properly lubricated?
Which of the problems listed will occur
when the economizer temperature is
below the acid dew point of the flue
gases?
Which of the problems listed will reduce
boiler efficiency?

Deformation of the
tank top.

Failure of pressure
parts.

Take the boiler out of Reduce the firing
service.
rate of the boiler to
its minimum.
Ensure that all
Tighten the gag only
moving parts of the finger tight to prevent
safety valve are free damage to the valve
to move before
stem, disc or seat.
installing the gag.
Corrosion of the
Failure of main
pedestal.
steam piping due to
misalignment.

Hairline fractures

Efficiency loss

External corrosion

Using worn sprayer
plates.

Steaming with a
clear stack.

Which of the pumps listed is normally
used in fuel oil service systems?

Two-stage
centrifugal

Positive
displacement rotary

Tolerating
All of the above.
unacceptable levels
of carbon monoxide
in flue gas.
Explosion proof gear Non-vented plunger

SG-0005

SG-0015

Hydrogen
embrittlement

Which of the pumps listed operates at Main feed booster
Main feed pump
constant speed and delivers water to
pump
the deaerating feed tank at a nearly
constant pressure?
Which of the pumps listed takes fuel oil Fuel oil service pump Fuel oil transfer
suction from the double bottom tanks
pump
and discharges it to the settling tanks?

Main condensate
pump

Main circulating
pump

Centrifugal type
general service
pump

Settler service pump

Which of the significant combustible
Oxygen
elements of fuel oil is a major source of
boiler corrosion?
Which of the stack emissions listed
Nitrogen
represents a heat loss from the
furnace?

Sulphur

Hydrogen

Carbon

Excess air

Superheated water
vapor

All of the above are
correct.

212

Illustration

SP091813

ABS

VER

250009

1

260004

250705

1

2

261230

1

253402

1

250101

7

256345

251900

1

1

Steam Plants

Question
Choice A
Which of the stated pressure conditions The pressure
identifies the boiler design pressure?
specified by the
manufacturer as a
criteria for boiler
design.
Which of the statements listed applies It provides torsional
to the quill shaft shown in the
rigidity to help
illustration?
maintain alignment
between gear train
and the turbine rotor.

Choice B
Choice C
A pressure lower
The same pressure
than boiler operating as the boiler
pressure.
operating pressure at
full power capacity.

Illustration
Choice D
The pressure at
which a boiler is
operated during
overload conditions.

It permits axial
movement between
the high speed gear
and low speed
pinion.

It compensates for
It absorbs the axial
high speed pinion
thrust generated by
radial misalignment. the meshing gears.

Which of the statements represents an Removal and
Cleaning of tubes is
advantage of the 'bent tube' method of replacement of tubes easier than other
installing boiler tubes?
is easier than with
methods.
other methods.

A comparatively
A minimum number
greater number of
of spare tubes must
holes can be placed be carried.
in a given area of
the tube sheet.

Which of the steam losses listed would
be associated with a multistage impulse
turbine rather than a multistage reaction
turbine?
Which of the symbols shown in the
illustration is used to identify a stopcheck valve?
Which of the systems or components
shown in the illustration, are supplied by
auxiliary exhaust steam?
Which of the terms listed represents the
ratio between the highest and lowest
fuel oil pressure at which the burners
will remain ignited?
Which of the test pressures listed is
considered to be satisfactory when
conducting a hydrostatic test on a
desuperheater, which has undergone a
welding repair, and has been reinstalled
in a boiler having a MAWP of 900 psi?

Radiation loss

Leaving loss

Blade and nozzle
loss

Diaphragm packing
loss

A

B

C

D

SE-0005

SG-0014
Air ejectors

Air/fuel ratio

250 psi

Intermediate
pressure bleed
steam system
Modulating band
ratio

Boiler air heaters

Firing range ratio

Turndown ratio

900 psi

1125 psi

1350 psi

213

Low pressure bleed
steam system

SG-0024

SP091813

ABS

VER

252105

1

250709

1

250608

1

257100

1

254303

1

253307

1

269855

3

256403

1

252203

1

Steam Plants

Question
Choice A
Which of the tools listed is used to
Swaging tool
remove a boiler tube from a header?
Which of the tube types listed can be
Water screen tubes
considered to serve as downcomers at
low firing rates, and as generating tubes
at high firing rates on some boilers?

Choice B
Laminating tool

Choice C
Backing out tool

Water wall tubes

Superheater support Riser tubes
tubes

Which of the types of superheaters
listed has the flattest superheat
temperature curve?
Which of the valves listed should be
closed before lighting off a boiler?
Which of the water supplies listed below
is typically used as a cooling medium
for the gland exhaust condenser,
intercondenser, and after condenser of
an air ejector unit?
Which piping system is described in the
illustration provided.

Radiant

Convection

Radiant-convection

Conductionconvection

Economizer drain
valve
Seawater

Air cock valve

Superheater vent
valve
Potable water

Superheater drain
valve
Evaporator distillate

Main superheated
steam system

Boiler feed and
condensate system

Condensate

Auxiliary
desuperheated
steam system
Which possible condition has occurred The control valve
The control valve ball There is a definite
if a vacuum is present at the
regulating flow to the float has been holed possibility of the tank
atmospheric drain tank vent while the
main condenser is
causing the ball to
overflowing causing
vessel is underway?
stuck in an open
remain in a lowered loss of distilled
position.
position.
water.
Which precaution should be observed Strip all water from
Close the
Heat the fuel oil in
to prevent damage to the fuel oil service the fuel oil settlers. recirculating valve
the settlers to the
pump when warming up the fuel service
when the proper
atomization
system?
atomization
temperature.
temperature is
reached.
Which procedure should be followed to Place trays of silica Alternately fire one
Open the furnace
dry out the fireside of a boiler after
gel in the furnace.
burner for 15 minute registers and run the
water washing?
intervals during a 5 forced draft fans for
hour period.
3 hours.

214

Choice D
Expanding tool

Turbine bleed steam
system

Illustration

SG-0010

There will be an
increase of vacuum
in the main
condenser within a
short period of time.
Bypass the fuel oil
meter so that
recirculating oil does
not register.

Use a wire reinforced
steam hose to put
superheated steam
in the furnace for 6
hours.

SP091813

ABS

VER

267804

3

250062

6

250161

258206

254206

1

1

2

Illustration
Question
Choice A
Choice B
Choice C
Choice D
Which ring dam arrangement should be The largest inside
The largest outside The smallest inside The smallest outside
used for centrifugal purification?
diameter ring without diameter ring without diameter ring without diameter ring without
loss of oil.
loss of oil.
loss of oil.
loss of oil.
Which set of boiler end points listed is
considered to be the normal order of
occurrence?
Which statement is true concerning
drain inspection tanks?

Combustion,
Circulation,
circulation, carryover carryover,
combustion
Inspection tanks
They are discharged
provide for a visual to the condensate
examination of
system just forward
condensate which
of the feed pump.
could be oil
contaminated.
Which statement is true concerning
As the rate of
With a constant firing With large amounts
operational factors affecting the degree combustion
rate and steam
of excess air,
of superheat in a single furnace boiler? increases, the
consumption equal superheater outlet
degree of superheat to generation, a
temperature will
increases throughout decrease in the
decrease due to the
the entire firing
incoming feed water lack of sufficient time
range.
temperature results for heat transfer to
in a superheat
take place.
temperature
decrease.
Which statement is true concerning two- Air is removed from Steam to the after
The first stage air
stage air ejector assemblies?
the condensate as it condenser is
ejector takes suction
passes through the condensed and
on the second stage
tubes.
returned to the main to increase vacuum.
condenser via the
loop seal.
Which statement listed represents a
vital function of the main condenser?

254107

1

Steam Plants

Circulation,
combustion,
carryover
Inspection tanks
collect all HP drains.

The recovery of feed Cooling of the
Storage of feed
water for reuse.
exhaust steam from water for immediate
the auxiliary exhaust use in the boilers.
system before it
enters the deaerating
feed tank.

215

Combustion,
carryover, circulation
They collect
condensate from the
cargo tank heating
coils only.

Carrying boiler water
total dissolved solids
higher than normal
could result in a
decrease in the
degree of superheat.

The steam/air
mixture from the
main condenser is
discharged by the
first stage air ejector
to the inter
condenser.
Condensing of the
exhaust steam from
the main feed turbine
pumps.

SP091813

ABS

VER

269851

1

269850

1

269850

2

269850

3

269850

4

269850

5

269850

6

269850

7

253402

2

253302

2

253302

3

261212

3

268708

2

Steam Plants

Question
Which steam plant operating condition
requires priority attention over the other
situations listed?
Which steam plant watch operating
condition requires priority attention over
the other conditions listed?
Which steam plant watch operating
condition will require priority attention
over the other conditions listed?
Which steam plant watch operating
condition will require priority attention
over the other conditions listed?
Which steam plant watch operating
condition will require priority attention
over the other situations listed?
Which steam plant watch operating
condition will require priority attention
over the other situations listed?
Which steam plant watch operating
condition will require priority attention
over the other situations listed?
Which steam plant watch operating
condition will require priority attention
over the other situations listed?
Which symbol shown in the illustration
is used to identify a stop-check valve on
a drawing?
Which system should be tested and
used when required to raise the water
level in an idle boiler?
Which system should be used when
required to raise the water level in an
idle boiler?
Which turbine blade is best suited for
high pressure installations?
Which type of bearing lining material is
most commonly used in modern
precision split type bearings?

Choice A
High level of lube oil
in the refrigeration
compressor
High level main
condenser

Choice B
High water level in
the deareating feed
water heater
High lube oil storage
tank level

High level main
condenser

High level lube oil
storage tank

Choice C
Low level effluent in
chlorination section
of sewage tank
Low sewage tank
chlorination section
level
Low water level main
boiler

High level hydrazine High level lube oil
dosing tank
storage tank

Low sewage tank
chlorination section
level
Low level, lube oil
High level, lube oil
Low level,
gravity tank
storage tank
chlorination section
of the sewage tank
Low level of lube oil High level of lube oil Low level effluent in
in cleansing tank
in storage tank
chlorination section
of sewage tank
Low level in lube oil High level in lube oil Low level effluent in
sludge tank
in storage tank
chlorination section
of sewage tank
Low oil level in the
High lube oil level in Low level effluent in
steering gear sumps all storage tanks
chlorination section
of sewage tank
A
B
C

Illustration
Choice D
High water level in
the fuel oil sludge
tank
Vapor issuing from
deaerating heater
vent
Deareating tank
pressure 2 psig
above normal
Low lube oil level in
the operating feed
pump
Low lube oil level to
operating, chemical
dosing pump
High water level in
main propulsion
boiler
High bilge water level
throughout engine
room
Low bilge water
levels throughout
entire engine room
D
SG-0014

Chemical feed
system

Auxiliary feed system Desuperheated
steam system

Chemical feed
system

Main feed system

Auxiliary condensate Main condensate
system
system

Pot-brazed oval
shrouded type
Zinc

Gagged type

Wire-lashed type

Monel

Babbitt

216

Superheated steam
system

Shrouded segmental
type
Copper

SP091813

ABS

VER

250006

3

253503

1

265001

2

268808

2

252303

263601

264800

1

1

1

264800

2

268107

1

Steam Plants

Question
Which type of energy conversion is
associated with an operating steam
boiler?
Which type of feed water regulator
listed provides the MOST effective
regulation of boiler water level under all
operating conditions?
Which type of packing is primarily
utilized to control steam leakage from
the casing of a modern auxiliary
turbine?
Which type of reduction gear
arrangement is shown in the
illustration?
Which type of waterside deposits can
normally be removed by chemically
boiling out a boiler?
While a vessel is underway the low
pressure turbine high-speed pinion is
damaged. The pinion is then removed
from the gear train. Under these
circumstances, the main unit is capable
of which speed and direction?

Choice A
Kinetic

Choice B
Thermal

Choice C
Mechanical

Choice D
Specific

Single-element

Double-element

Triple-element

Monothermonic

Teflon

labyrinth

carbon

dovetail

Locked train, double Articulated, double
reduction.
reduction.

Nested, double
reduction.

Two-pinion, single
reduction.

Corrosion deposits

High temperature
oxide

Oil

Sludge

Reduced speed
ahead only

Reduced speed
astern only

Reduced speed
Reduced speed
ahead and full speed astern and full speed
astern
ahead

While a vessel is underway, one of the
FIRST indications of the failure of the
gland leak off exhaust fan motor is
__________.
While a vessel is underway, one of the
FIRST indications of the failure of the
gland leak off exhaust fan motor is
__________.
While a vessel is underway, which of
the conditions listed would indicate a
leak in the lube oil cooler?

loss of vacuum at
the turbine

increased turbine
water knock in the
exhaust temperature turbine gland steam
header

excessive steam
leakage at the
turbine glands

loss of vacuum at
the turbine

increased turbine
water knock on the
exhaust temperature turbine gland steam
header

Excessive lube oil
consumption.

Excessive water
discharge rate from
the lube oil purifier.

Contamination of the Corrosion of the
lube oil.
journals and
bearings.

217

Illustration

SE-0013

excessive steam
leakage at the
turbine glands

SP091813

ABS

VER

269706

1

269707

269704

255312

269701

269701

1

1

1

2

1

Steam Plants

Question
While making a round of the engine
room, the oil in all of the main engine
bearing sight glasses appears to be
milky. The probable cause is
__________.
While making engine room rounds at
sea, you observe excessive steam
leaking from the forward gland on the
high pressure turbine. This may
indicate that the __________.
While making your rounds, you notice
the main lube oil temperature to be
higher than normal. To remedy this
situation, you should __________.

Choice A
cold running of the
bearing

Choice B
collapse of the oil
wedge

Choice C
air leakage into the
bearing

Choice D
water contamination
of the lube oil

turbine is operating
at low speed

gland seal leak off
line is obstructed

main condenser
vacuum is too high

drains were left open

speed up the main
lube oil pump

open the lube oil
throttle in on the lube increase the opening
cooler seawater inlet oil cooler seawater
of the lube oil cooler
valve wider
discharge valve
seawater discharge
valve

While maneuvering out of port, you
decrease gland
answer a stop bell. You notice a lot of sealing steam
steam coming out of the gland exhaust pressure
condenser vent, in addition to the main
condenser hot well level being low. For
this condition you should __________.

speed up the
condensate pump

manually recirculate increase steam
condensate and add pressure to the air
some makeup feed ejectors

While on watch aboard a 900 psi (6.2
MPa) steam vessel, you suddenly hear
a loud, piercing, high-pitched noise.
Which of the following actions should
you take?

Vacate everyone
from the engine
room immediately,
as this is the
preliminary signal
that CO2 is about to
be released.

Rapidly move
towards the direction
of the noise to
investigate the
probable source.

Cautiously move
towards the source
of the noise,
sweeping the beam
of your flash light
ahead of you.

Move away from the
noise to find a
broom, then
cautiously advance,
sweeping the handle
ahead of you to
locate the source.

While on watch aboard a 900 psi steam
vessel, you suddenly hear a loud,
piercing, high-pitched noise. Which of
the following actions should you take?

Vacate everyone
from the engine
room immediately,
as this is the
preliminary signal
that the steam
smothering system is
about to be released.

Rapidly move
towards the direction
of the noise to
investigate the
probable source.

Cautiously move
towards the source
of the noise,
sweeping the beam
of your flash light
ahead of you.

Move away from the
noise to find a
broom, then
cautiously advance,
sweeping the handle
ahead of you to
locate the source.

218

Illustration

SP091813

ABS

VER

269905

1

269705

2

269910

1

257102

1

269936

269900

2

1

Steam Plants

Question
While on watch at sea with only one
ship's service turbo-generator on line,
the entire plant suddenly blacks out
without warning. After restoring power,
which of the following faults would most
likely have attributed to this casualty?

Choice A
The turbo-generator
throttle valve position
"micro switch"
vibrated open,
allowing the main
breaker to trip open
according to its
protection circuitry.

Choice B
Choice C
Someone pushed
The main air
the trip button to the compressor
'shore power'
suddenly stopped.
breaker.

Choice D
The standby
generator started
automatically and
became motorized.

While on watch at sea, you notice the
main lube oil pump suction vacuum has
been increasing. To correct this you
should __________.

slightly open drain
lines on each of the
duplex suction
strainers to decrease
vacuum differential

back flush each of
the duplex strainer
baskets through the
recirculating line

stop the main engine
prior to removing
suction strainer
covers, if changing
over to the standby
strainer did not
correct the condition

rotate the knife edge
cleaning device
handle one complete
turn

slow down the
engines

blow down the boiler open the feed water
gage glass
regulator bypass

While on watch in the engine room and secure the fires
steaming at a steady rate, the water
level begins to decrease and suddenly
drops out of sight in the boiler gage
glass. Your FIRST corrective action
should be to __________.
While raising steam on a cold boiler, the
air cock is to be closed after
__________.
While standing watch at sea and
steaming full ahead, reducing the boiler
forced draft pressure would also have a
tendency to correct which discrepancy?

the boiler is cut in on steam has formed
the line
and all air is vented
High superheat
temperature.

While standing watch in the engine
call the Chief
room of a steam vessel while at normal Engineer
sea speed, you notice that the
immediately
condensate temperature outlet of the air
ejector condenser is fluctuating by
approximately 12°F. You should
therefore ________.

White smoke from
the stack.

only need to log the
temperature and
inform the watch
engineer who will
relieve you

219

Illustration

the economizer drain all burners have
is closed
been lit and firing
normally
High stack
All of the above.
temperature.

only need to add
first determine
make-up feed to the whether the main
system
condenser level is
normal and steady

SP091813

ABS

VER

269925

1

269908

269918

269931

269930

269902

269933

1

1

1

2

1

3

Steam Plants

Question
Choice A
While standing watch in the engine
erratic water flow
room, irregular feeding or surging of the through the air
feed water supply to a flash evaporator eductor
may be attributed to __________.

Choice B
Choice C
Choice D
a clogged vent line
excessive pressure a dirty strainer in the
from the air educator in the seawater feed saltwater feed pump
condenser
heater
suction line

While standing watch in the engine
Decrease the steam
room, which of the following actions
pressure to the air
should be taken to reestablish a 'blown' ejector nozzles.
air ejector loop seal?

Shut off the steam to
the second stage air
ejector momentarily
then open it again.

Momentarily close
the valve in the loop
seal line, then
reopen slowly.

Increase the
condensate flow
through the air
ejector.

While standing watch in the engine
shaft sleeves
room, you hear a 'crackling' sound
coming from within a salt water service
system centrifugal pump. The most
probable cause for this occurrence
would be from an abnormal condition at
the __________.

discharge volutes

wearing rings

pump suction

chill shocking is
leakage at the
necessary to remove second-stage
scale
condenser

faulty operation of
the brine overboard
pump

carryover in the firststage

gasketed joints

gage glass packing

all of the above

While standing watch in the engine
room, you notice a high reading at a
salinity cell located in the loop seal
between two stages of a flash type
evaporator. This would indicate
__________.
While standing watch in the engine
room, you suspect air leaking into a
flash type distilling plant. The most
probable cause(s) of the air leak could
occur through __________.
While standing watch underway at sea
in the engine room, there is a complete
loss of electrical power. When power is
restored, the steering gear pump motor
will _________.
While standing watch underway at sea,
you notice salinity carryover in the low
pressure distilling plant. This can be a
result of __________.

valve stems

have to be restarted have to be reset
from the steering
before restarting
gear room

Illustration

restart automatically trip via the overload
because it utilizes an relay
LVR controller

insufficient chemical a pressure drop
below normal steam low distillate
feed
through the loop seal supply pressure
conductivity

220

SP091813

ABS

VER

269903

1

269702

269503

269503

269503

252603

7

2

3

1

1

Steam Plants

Question
While standing watch underway in the
engine room, failure of the normal
power supply will cause the emergency
generator to provide power through
__________.
While standing watch, what immediate
action should you take if you are
running at sea speed and notice a
sudden and significant drop in lube oil
pressure to the main turbine?

Choice A
the main bus tie
feeder

Choice B
its output breaker
and automatic bus
transfer device

Choice C
line connection
feeder

Immediately increase Slow the turbine to
Stop the main shaft
cooling water flow to minimum speed and using astern steam.
lube oil cooler.
watch the bearing
temperatures.

Illustration

Choice D
power failure alarm
bus

Shift strainers and
gravity tanks.

While standing your engine room watch Immediately stop the
at sea, you notice the D.C. heater level main engine.
dropping below the normal minimum
level as indicated by the remote level
indicator. Which of the following
actions should be taken?

Do nothing in
particular as this is a
common occurrence
with steam
propulsion plants.

It is only necessary
to immediately open
the automatic makeup feed bypass
valve.

Open the make-up
feed valve bypass
valve and check the
condenser and makeup feed tank levels
immediately.

While standing your engine room watch increase the boiler
at sea, you notice the D.C. heater level firing rates
is dropping below normal as indicated
by the remote level indicator. The boiler
drum level is observed to be normal, as
is the main condensate pump discharge
pressure. Therefore, you should
__________.

decrease the boiler
firing rates

reduce the feed
water level set point

open the make-up
feed bypass valve

While standing your engine room watch Do nothing as this is
at sea, you notice the D.C. heater level a common marine
is gradually dropping as indicated by the plant occurrence.
remote level indicator. Which of the
following actions should you take?

Immediately open
the automatic makeup feed bypass
valve.

Check the
Immediately stop the
condensate level in main engine.
both the main and
auxiliary condenser
hot wells.

While the vessel is rolling in heavy
the gage glass is
there is most likely
the steam drum is
seas, the level in the boiler gage glass functioning normally an obstruction in the adequately baffled
remains steady, this is an indication that
lower valve
__________.

221

the water level in the
steam drum is too
low

SP091813

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256705

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269906

269919

252900

269913

1

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Steam Plants

Question
While trying to light off a burner on a
semi-automated boiler, you note that
the fuel oil solenoid valve at the burner
will not stay open. Which of the
following conditions could cause this
problem?
While underway at sea, a mechanical
malfunction in one of the ship's service
generators operating in parallel,
requires that you must secure that
generator. In order to prevent a
possible overload to the remaining
generator, which of the following
sequential courses of action should be
taken?

Choice A
Choice B
The fuel oil pressure The flame scanner is
at that burner is too adjusted for
high.
excessive time delay
in the ignition trial
circuit.

Choice C
The solenoid coil is
energized causing
the valve to remain
closed.

Choice D
The forced draft air
supply has failed.

Trip the
malfunctioning
generator's circuit
breaker and prime
mover throttle trip.

Trip all non-vital
distribution feeder
circuit breakers,
decrease the load on
that generator by
using the governor,
trip the
malfunctioning
generator's circuit
breaker, and trip the
prime mover throttle.

Trip the
malfunctioning
generator's circuit
breaker and
distribution feeder
circuit breakers.

Trip all non-vital
distribution feeder
circuit breakers, the
malfunctioning prime
mover turbine throttle
trip, and the
generator circuit
breaker.

While underway at sea, one of three
start a second pump
available centrifugal salt water service and operate it in
pumps is in operation with a sea water parallel
temperature of 50°F. The operating
temperature of all the systems supplied
by this pump appear to be high. Your
next proper course of action would be to
__________.

start a second pump
and verify a higher
discharge pressure
after securing the
first pump

start the second
pump, open the
casing vent valve of
the first pump, then
secure the first pump

start the second
pump, secure the
first pump and do
nothing else with the
salt water service
system

While underway at sea, the feed water dew point
inlet temperature to a boiler economizer temperature of the
is determined by the __________.
stack gases

superheater inlet
temperature

temperature of the
HP turbine bleed

desuperheater outlet
temperature

While underway on watch in the engine
room of a steam vessel, the proper
valve positions for controlling feed water
to the boiler using the auxiliary feed
system should be __________.

the stop valve fully
open and the
auxiliary check valve
used to regulate the
amount of flow

the stop and check
valves fully open and
the feed pump speed
used to regulate the
amount of flow

the check valve fully
open and the stop
valve regulated by
the feed water
regulator

the auxiliary check
valve fully open and
the stop valve used
to regulate the
amount of flow

222

Illustration

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269909

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254217

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259001

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Steam Plants

Question
While underway on watch, you notice
that you need to constantly increase the
coil pressure in the high pressure
contaminated evaporator to maintain
capacity. Which of the following may be
the cause?
While underway on watch, you notice
that you need to constantly increase the
coil pressure in the high pressure
contaminated evaporator to maintain
capacity. Which of the following may be
the cause?
While underway, the boiler water level
in a steaming boiler begins dropping
rapidly and cannot be kept at the
normal level by standard practices. As
the engineer on watch, your next action
should be to __________.
While underway, vacuum in the main
condenser is primarily caused by the
__________.
While vacuum is being raised on the
main unit and the turbine is being
warmed, condensate is recirculated to
the main condenser to __________.

Choice A
The brine density is
improper.

Choice B
Choice C
The heating transfer Impure distillate is
surfaces are being
being produced.
layered with scale.

Illustration
Choice D
Shell vapor pressure
is constantly
decreasing.

The water level is too Excessive distillate is The heating coils
Shell pressure is
high.
being produced.
have excessive scale excessive.
buildup.

continue to speed up blow down the gage secure the steam
secure the fires and
the feed pump to
glass to find the true stop and then secure then secure the main
raise the water level water level
the fires
feed stop/check
valve to the boiler

suction drawn by the condensing of the
condensate pump
exhausting steam

main air ejector

ensure the
condensation of air
ejector steam

cool the main
condenser shell for
better vacuum

provide a condenser maintain a proper
vacuum seal
DC heater water
level

condenser

desuperheater

While your vessel is steaming at a
economizer
constant rate, the alkalinity in one of the
boilers is decreasing steadily without
requiring the use of extra makeup feed
water. This condition could be caused
by a leak in the __________.

While your vessel is steaming with one The steam pressure The steam pressure The water level will
boiler, the automatic combustion control will drop.
will rise.
rise.
system sensing line for the idle boiler is
accidentally opened. How will this
effect the steaming boiler?

223

after condenser loop
seal

superheater

The water level will
drop.

SP091813

ABS

VER

251707

1

258216

2

258216

4

261205

2

Question
While your vessel is underway at
normal speed, a steam drum safety
valve develops a significant leak. Your
first corrective action should be to
__________.
White smoke coming from the stack of
a main propulsion boiler indicates
__________.
White stack smoke from a main
propulsion boiler could indicate
__________.
Why are convergent-divergent nozzles
used in high-pressure turbine
applications?

Why are geared turbine installations
equipped with turning mechanisms?
263003

259594

258008

250162

268609

2

4

2

4

1

Steam Plants

Illustration
Choice A
Choice B
Choice C
Choice D
attempt to reseat the secure the boiler and inspect the escape secure the boiler and
valve using the hand check the valve
piping for binding on blank off the valve
releasing gear
spring compression the valve body
flange

too much excess air partially burned fuel
particles are leaving
the stack
excessive amount of low fuel temperature
combustion air

excessive air velocity all of the above
through the air
registers
insufficient air for
excessive furnace
combustion
combustion
temperature
They are easy to
They are less
They produce a
They direct the
manufacture.
susceptible to steam larger pressure drop steam flow more
erosion than other
and therefore are
efficiently than other
nozzle types due to more efficient than nozzle types.
their shape.
other nozzle types.
For jacking the main For turning the main For turning the main For all of the above
engine over
engine during routine engine during warm- purposes.
periodically when
inspections.
up and securing
secured.
operations.

Why are hard scale deposits on the
inside of boiler tubes most
objectionable?

Flow of water within Poor heat transfer
the tube is restricted. due to hard scale
deposits overheats
tubes.

Why are the burner registers closed a
few minutes after a boiler has been
secured to be cooled?
Why are the condensate drains from
the fuel oil heaters and fuel oil tank
heating coils returned to the drain
inspection tank?
Why are the gear teeth of large
reduction gears usually cut in a
temperature controlled room?

To prevent cracking
the furnace
refractory.
To allow any oil to be
separated from the
steam.
To prevent stress
buildup.

To prevent further
steam generation.
To detect and
prevent oil from
getting in the boiler
water.
To prevent ambient
conditions from
affecting the
tolerances of the
machining process.

224

The metal of the
Hydroxyl ions
tube interior is eaten liberated by the
away by scale.
scaling process form
acid in the boiler
water.
To allow more rapid To allow continued
furnace cooling.
steam generation.
As a safety
precaution to prevent
oil leaks from these
coils.
To control the size of
the journals.

As a safety
precaution to prevent
oil leaks into the
bilges.
To control cutting
machine vibration.

SP091813

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256504

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256504

261011

254219

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Question
Choice A
Choice B
Why are two fuel oil heaters "E"
Each heater supplies To allow fuel of
provided in the fuel oil system shown in fuel to a different
different
the illustration?
boiler.
temperatures to be
provided to be
provided to each
boiler.
Why are two fuel oil heaters "E"
Each heater supplies To allow fuel of
provided in the fuel oil system shown in fuel to a different
different
the illustration?
boiler.
temperatures to be
provided to be
provided to each
boiler.
Why do double flow reaction turbines
Because there is no Because partially
produce very little axial thrust?
pressure drop across expanded steam is
the blades.
exhausted to the low
pressure turbine
where the expansion
is completed.
Why does air entry into the main
condenser reduce the efficiency of the
steam cycle?

Steam flow rate
through the main
turbine increases

Why is a flexible I-beam rigidly mounted To relieve stress on
at the forward end of the main turbine? the hull.
261800

4

269120

2

262404

3

254403

2

Steam Plants

Why is a high lube oil level in the main
engine reduction gear sump
undesirable?
Why is it important to maintain good
vacuum in a main turbine unit while
operating astern?

Oil churning may
result.

Why is it necessary to have a relief
valve protect the deaerating feed tank
from internal pressure?

Because the tank
receives auxiliary
exhaust.

Reduces windage
loss in the astern
section.

Choice C
To provide a backup
in case one of the
heaters becomes
inoperable.

Illustration
Choice D
Two heaters are
necessary when both
boilers steam at full
SG-0009
load.

To provide a backup To provide series
in case one of the
operation at high
heaters becomes
firing rates.
inoperable.

Because the axial
thrust is developed
on the rotor in
opposite directions
providing
counterbalance.

SG-0009

Because equalizing
holes are provided in
the turbine wheels.

Condensate sub
Low pressure turbine
cooling in the main exhaust steam
condenser increases enthalpy value
increases
Allow for turbine
To relieve stress at
casing expansion
the light end of the
and contraction.
turbine.

The air mixes with
the steam and enters
the condensate

Prevents the ahead
element from
operating
backwards.
Because the tank
receives high
pressure drains.

Maintains proper
temperatures in the
ahead stage.

Limits the amount of
time necessary to
operate astern.

Because the tank
receives large
amounts of water.

Because the tank
drains to the main
condenser.

Prevent the reaction
developed within the
turbine from being
transmitted to the
hull.
The oil may become Oil temperature may All of the above.
aerated.
rise.

225

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257107

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250027

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Steam Plants

Question
Why is it occasionally necessary to
verify the accuracy of the distilled water
make-up feed tank level remote
indicator?

Choice A
It is possible to loose
vacuum if the level
rises above the
make-up feed piping
connection.

Choice B
A false high reading
may contribute to an
increase in
condenser absolute
pressure.

Choice C
Choice D
The tank may
All of the above are
overflow in the
correct.
engine space
causing unnecessary
damage to all
electrical equipment.

Why is it occasionally necessary to
verify the accuracy of the distilled water
make-up feed tank remote level
indicator?

It is possible to loose
vacuum if the level
rises above the
make-up feed piping
connection.
Less specific energy
available per pound
of steam.

A false high reading
may contribute to an
increase in
condenser absolute
pressure.
Greater heat energy
available per pound
of steam.

The tank will
overflow to the
potable water tanks
causing
contamination
Higher pressure
available than
saturated steam.

All of the above are
correct.

To ensure a proper
fuel to air ratio.

To clear the furnace
of any explosive
gases.
To ensure that all
water is removed
from the fuel.

To make the fires
easier to light.

Why is superheated steam used in the
main propulsion turbines instead of
saturated steam?

Why should a boiler furnace be purged To control air
before the first burner is lit off?
pressure in the
windbox.
Why should the fuel oil be recirculated To allow the fuel
before lighting off a cold boiler?
strainers to
thoroughly clean the
fuel.
With an increase in the saturation
decrease the
pressure of a fluid, the value
number of BTU's per
represented by line "5" on the graph will pound per change in
__________.
degree of
temperature
With reference to the chart, if a boiler
96.85 BTU
generates saturated steam at 385.3
psig, how much heat per pound was
required to change the water into steam
if the feed water temperature was
initially 104.5°C?

To heat the fuel
enough for proper
atomization.

Lower required
specific volume than
saturated steam.

To allow fuel
pressure to buildup
gradually.

increase the number remain virtually the
of BTU's per pound, same
per change in degree
of temperature

represent an
increase in the latent
heat of condensation

97.15 BTU

1196.45 BTU

226

1016.40 BTU

Illustration

SG-0001

SG-0004

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267226

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Steam Plants

Question
With the steam control valve wide open
during normal operation, the rate of
steam flow from the auxiliary exhaust
steam line to the DC heater is actually a
function of __________.
With vacuum up and the main
propulsion turbine standing by while
awaiting engine orders, it is necessary
to roll the unit alternately ahead and
astern every five minutes to
__________.
You are standing a sea watch in the
engine room of a steam vessel. To
operate at maximum efficiency,
adjustments to the boiler combustion
control system should be made by
setting the __________.
You are standing watch in the engine
room of a steam vessel. You should
blow down a gage glass periodically to
__________.
You can secure the fuel supply to the
boilers from outside the fire room by
__________.
You should blow down a gage glass
periodically to __________.
You would not see a flow through the
bull's-eye of the lube oil gravity tank
overflow line when the __________.
You would not see a flow through the
bull's-eye of the lube oil gravity tank
overflow line when the __________.

Choice A
Choice B
rate of condensation spring pressure of
in the DC heater
the spray valves

Illustration
Choice C
Choice D
water level in the DC rate of evaporation in
heater reservoir
the DC heater

distribute the gland
sealing steam evenly
throughout the
glands

slowly bring the lube
oil and bearings to
operating
temperature

warm the astern
reduce the possibility
guarding valve and of warping the
the low lube oil
turbine rotors
pressure throttle trip

fuel oil back
pressure

air volume regulators fuel/air ratio
controller

forced draft fan
damper positions

remove any
sediment that has
accumulated

maintain the proper
water level in the
steam drum

test the feed water
stop-check valve

provide water
samples for the
second assistant

operating the remote operating the double closing the master oil closing the oil
shutoff
bottom sluice valves valve with the reach recirculating valve
with the reach rod
rod
with the remote
control
remove any
maintain the proper provide water
test the feed water
sediment from the
water level in the
samples for the
stop-check valve
glass
steam drum
second assistant
main engines are
main engines are
the lube oil service
main engines are
stationary at a stop secured and the
pumps are secured turning at normal sea
bell
turning gear is
speed
engaged
main engines are
main engines are
the lube oil gravity
main engines are
stationary at a stop secured and the
tanks are being
turning at normal sea
bell
turning gear is
drained
speed
engaged

227

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254106

2

Question
Choice A
Your main propulsion boilers are
opened the feed
equipped with a two element feed water water valve wide due
regulating control system. While on
to the effect of shrink
watch, you are required to respond to a
'slow' bell from full sea speed. Under
these conditions the automatic feed
water regulator will have __________.

Choice B
closed down on the
feed water valve due
to the decrease in
steam flow demand

Choice C
partially closed down
on the feed water
valve due to the
effect of swell

Your vessel is steaming full ahead and
operating on both boilers. If the boiler
water level of one boiler drops out of
sight low in the sight glass and the
burners have been secured, besides
slowing down the main engine, what
further action should be taken?

close the main
steam stop

manually feed the
start the standby
boiler to bring up the feed pump
level

Zincs are installed in the main and
auxiliary condenser waterboxes to
__________.

reduce turbulence

prevent air pockets

Illustration
Choice D
fully opened the feed
water valve due to
the increase in
steam flow

blow down the gage
glass

reduce the effects of prevent scaling
electrolysis

END OF DOCUMENT

Steam Plants

228

SP091813