3RD CLASS STATIONARY STEAM
ENGINEER LICENSE PREP EXAM 2025
QUESTIONS AND ANSWERS
_________ are necessary for complete combustion - ANS time, temperature, mixture, and
atomization
if the steam pressure gauge indicates 200 PSIG, the absolute pressure is______ - ANS 214.7
a boiler is operating at 400 PSI, and the safety valve opens at 410 PSI and closes at 398 PSI. The
blowdown is______psi - ANS 12
an oil cooler is commonly used with a(n) ________ when operating in conjunction with a turbo-
generator - ANS steam turbine
a boiler is producing 40,000lb of steam/hr at a pressure of 100 PSI and a steam temperature of
500 degrees Fahrenheit. The steam produced is _______ steam - ANS superheated
the economizer on a boiler is used to _______ - ANS add heat to the feed water
blowers are normally used with________ boilers - ANS water tube
overheating of tubes on a boiler can be caused by________ - ANS scale on tubes
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,carbon dioxide in a condensate return system causes_________ - ANS channeling
a ________ pump is a positive displacement pump - ANS reciprocating
a boiler generating 6000 lb of steam/hr produces _______btu/hr - ANS 6,000,000
a bottom blowdown is performed on a boiler to _____ - ANS discharge sludge and sediment
water columns are connected to the boiler with a minimum of _______" pipe - ANS 1
the minimum size of a water column blowdown valve is_______". - ANS 3/4
the maximum size bottom blowdown valve on a boiler is_________". - ANS 2 1/2
a ________ allows condensate to pass through, but stops Steam. - ANS a steam trap
when taking over a shift, the first thing to do is check the________ - ANS water level in each
boiler
according to the asme code, a high-pressure boiler having more than 500 square feet of heating
surface shall have________ - ANS two or more safety valves
the probable cause of an increase in temperature of gases of combustion at the boiler Outlet
is____ - ANS dirty heating services
boilers in battery equipped with________ must have two main steam stop valves and a free-
flowing drain between them - ANS manhole openings
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, in order to be sure the gauge glass is indicating an accurate water level reading, the stationary
engineer should______ - ANS blowdown the gauge glass
a continuous blowdown line is located___ - ANS in the Steam and water drum well below the
nowl
a temperature reading of 80 degrees Celsius is equal to_________°f - ANS 176
a chimney temperature of 250 degrees Fahrenheit above steam temperature indicates_______
- ANS poor efficiency
a manometer is red in________ - ANS inches of water
the boiling point of water will____ with an increase in pressure - ANS be raised
if a lather is not obtained when performing a soap hardness test, the water sample is_______ -
ANS hard
combustion efficiency can be increased when air is________ - ANS preheated
______ draft is produced by a fan located between the boiler and the chimney - ANS induced
the overspeed trip on a steam turbine should be tested ______ - ANS before putting the
steam turbine on-line
a high CO2 reading in the gases of combustion is a sign of____ - ANS High combustion
efficiency
3 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
ENGINEER LICENSE PREP EXAM 2025
QUESTIONS AND ANSWERS
_________ are necessary for complete combustion - ANS time, temperature, mixture, and
atomization
if the steam pressure gauge indicates 200 PSIG, the absolute pressure is______ - ANS 214.7
a boiler is operating at 400 PSI, and the safety valve opens at 410 PSI and closes at 398 PSI. The
blowdown is______psi - ANS 12
an oil cooler is commonly used with a(n) ________ when operating in conjunction with a turbo-
generator - ANS steam turbine
a boiler is producing 40,000lb of steam/hr at a pressure of 100 PSI and a steam temperature of
500 degrees Fahrenheit. The steam produced is _______ steam - ANS superheated
the economizer on a boiler is used to _______ - ANS add heat to the feed water
blowers are normally used with________ boilers - ANS water tube
overheating of tubes on a boiler can be caused by________ - ANS scale on tubes
1 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
,carbon dioxide in a condensate return system causes_________ - ANS channeling
a ________ pump is a positive displacement pump - ANS reciprocating
a boiler generating 6000 lb of steam/hr produces _______btu/hr - ANS 6,000,000
a bottom blowdown is performed on a boiler to _____ - ANS discharge sludge and sediment
water columns are connected to the boiler with a minimum of _______" pipe - ANS 1
the minimum size of a water column blowdown valve is_______". - ANS 3/4
the maximum size bottom blowdown valve on a boiler is_________". - ANS 2 1/2
a ________ allows condensate to pass through, but stops Steam. - ANS a steam trap
when taking over a shift, the first thing to do is check the________ - ANS water level in each
boiler
according to the asme code, a high-pressure boiler having more than 500 square feet of heating
surface shall have________ - ANS two or more safety valves
the probable cause of an increase in temperature of gases of combustion at the boiler Outlet
is____ - ANS dirty heating services
boilers in battery equipped with________ must have two main steam stop valves and a free-
flowing drain between them - ANS manhole openings
2 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
, in order to be sure the gauge glass is indicating an accurate water level reading, the stationary
engineer should______ - ANS blowdown the gauge glass
a continuous blowdown line is located___ - ANS in the Steam and water drum well below the
nowl
a temperature reading of 80 degrees Celsius is equal to_________°f - ANS 176
a chimney temperature of 250 degrees Fahrenheit above steam temperature indicates_______
- ANS poor efficiency
a manometer is red in________ - ANS inches of water
the boiling point of water will____ with an increase in pressure - ANS be raised
if a lather is not obtained when performing a soap hardness test, the water sample is_______ -
ANS hard
combustion efficiency can be increased when air is________ - ANS preheated
______ draft is produced by a fan located between the boiler and the chimney - ANS induced
the overspeed trip on a steam turbine should be tested ______ - ANS before putting the
steam turbine on-line
a high CO2 reading in the gases of combustion is a sign of____ - ANS High combustion
efficiency
3 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
