Stationary Engineer Exam Study Guide |
2025 | 630 Questions with 100% Correct
Answers | Updated & Verified
A ______ fuse is necessary for a circuit with a load of 21,000 watts and a
voltage of 220 volts.
A. 100
B. 150
C. 175
D. 200
A. 100 amps. Note: V = IR Therefore I = V/R 21,000 amps /220 volts = 95
amps
At 0 psig, how many BTU's are required to change 1 lb of water at 212F
to steam?
A. 144
B. 180
C. 970
D. 1190
C. 970 BTU
Radiation is:
A. the movement of liquids or gases created by a temperature
difference.
B. Heat transfer by direct molecular contact
C. the weight of a substance compared to unity
D. Heat transfer by waves
D. Heat transfer by waves
,Sensible heat is:
A. An established relationship comparing any substance to the heat
content of water.
B. Heat quantity that can be felt or measured by a thermometer
C. Heat quantity above the saturation point
D. Measure of heat intensity
B. Heat quantity that can be felt or measured by a thermometer
All steam lines should be pitched:
A. In the direction of flow
B. Back towards the boiler
C. Level
D. For convenience
A. In the direction of flow
Draw a simple picture of a Sterling Boiler. Label it.
Describe the water flow through a Sterling Boiler
Feedwater flows to 1) rearmost drum 2) down to the mud drum 3) up to
middle drum 4) to front drum through crossover pipes and 5) back down
to mud drum
Draw a picture of a Scotch Boiler. Label the firebox, combustion
chamber, crown sheet, tubes, feed water inlet, steam outlet, stack,
Economizer and Superheater.
Draw a picture of a Firetube Boiler. Label it.
Draw a picture of a Locomotive Fire Tube Boiler. Label it.
Increasing the pressure will have what effect on the boiling point of
water?
A. No change
B. Lower BP
C. Higher BP
D. Temperature will increase 2F for every psi
C - higher Boiling Point
Heat absorbed by water when is changes from liquid to steam at the
boiling point is called:
A. Sensible heat
,B. Latent heat
C. Specific heat
D. Super heat
B. Latent Heat
Heat may be transferred in how many ways?
A. 1
B. 2
C. 3
D. 4
C. 3 ways: conduction, convection and radiation
A boiler horsepower is defined as:
A. 970.3 BTU
B. Total heating surface times the evaporation factor
C. evaporation of 34.5 lb of water and at 212F per hour
D. evaporation of 34.5 lb of water from and at 212F per 8 hours
C. evaporation of 34.5 lb of water and at 212F per hour
A boiler's steam pressure gauge reads 150 psig. What is the absolute
pressure?
A. 14.7 psia
B. 135.3 psia
C. 150 psia
D. 164.7 psia
D. 164.7 psia (150 psig + 14.7 psi = 164.7 psia)
What does 212F equal on the Celsius scale?
A. 32C
B. 100C
C. 180C
D. 970.3C
B. 100C
One boiler horsepower is equal to how many BTU's?
A. 970.3
B. 33,472 BTU
, C. 125,000 BTU
D. 288,000 BTU
B. 33,472 BTU
A British Thermal Unit is
A. the amount of heat needed to raise 1 lb of water 1F
B. the amount of heat needed to raise 1 lb of steam 1F
C. A unit of temperature measurement
D. the amount of heat in water between freezing and boiling
A. The amount of heat needed to raise 1 lb of water 1F
Hydronic heat is:
A. Steam heat
B. Hot water heat
C. Radiant heat
D. Heat of evaporation
B. Hot water heat
Superheated steam is:
A. reheated steam
B. very hot steam
C. flash steam
D. saturated steam
B. Very hot steam
2,545 Btuh represents:
A. 1 brake horsepower
B. 1 kilowatt-hour
C. 1 horsepower-hour
D. 1 therm
C. 1 horsepower-hour
A throttling calorimeter is used to measure the quality of:
A. dry steam
B. saturated steam
C. superheated steam
D. BTU in coal
B. saturated steam
2025 | 630 Questions with 100% Correct
Answers | Updated & Verified
A ______ fuse is necessary for a circuit with a load of 21,000 watts and a
voltage of 220 volts.
A. 100
B. 150
C. 175
D. 200
A. 100 amps. Note: V = IR Therefore I = V/R 21,000 amps /220 volts = 95
amps
At 0 psig, how many BTU's are required to change 1 lb of water at 212F
to steam?
A. 144
B. 180
C. 970
D. 1190
C. 970 BTU
Radiation is:
A. the movement of liquids or gases created by a temperature
difference.
B. Heat transfer by direct molecular contact
C. the weight of a substance compared to unity
D. Heat transfer by waves
D. Heat transfer by waves
,Sensible heat is:
A. An established relationship comparing any substance to the heat
content of water.
B. Heat quantity that can be felt or measured by a thermometer
C. Heat quantity above the saturation point
D. Measure of heat intensity
B. Heat quantity that can be felt or measured by a thermometer
All steam lines should be pitched:
A. In the direction of flow
B. Back towards the boiler
C. Level
D. For convenience
A. In the direction of flow
Draw a simple picture of a Sterling Boiler. Label it.
Describe the water flow through a Sterling Boiler
Feedwater flows to 1) rearmost drum 2) down to the mud drum 3) up to
middle drum 4) to front drum through crossover pipes and 5) back down
to mud drum
Draw a picture of a Scotch Boiler. Label the firebox, combustion
chamber, crown sheet, tubes, feed water inlet, steam outlet, stack,
Economizer and Superheater.
Draw a picture of a Firetube Boiler. Label it.
Draw a picture of a Locomotive Fire Tube Boiler. Label it.
Increasing the pressure will have what effect on the boiling point of
water?
A. No change
B. Lower BP
C. Higher BP
D. Temperature will increase 2F for every psi
C - higher Boiling Point
Heat absorbed by water when is changes from liquid to steam at the
boiling point is called:
A. Sensible heat
,B. Latent heat
C. Specific heat
D. Super heat
B. Latent Heat
Heat may be transferred in how many ways?
A. 1
B. 2
C. 3
D. 4
C. 3 ways: conduction, convection and radiation
A boiler horsepower is defined as:
A. 970.3 BTU
B. Total heating surface times the evaporation factor
C. evaporation of 34.5 lb of water and at 212F per hour
D. evaporation of 34.5 lb of water from and at 212F per 8 hours
C. evaporation of 34.5 lb of water and at 212F per hour
A boiler's steam pressure gauge reads 150 psig. What is the absolute
pressure?
A. 14.7 psia
B. 135.3 psia
C. 150 psia
D. 164.7 psia
D. 164.7 psia (150 psig + 14.7 psi = 164.7 psia)
What does 212F equal on the Celsius scale?
A. 32C
B. 100C
C. 180C
D. 970.3C
B. 100C
One boiler horsepower is equal to how many BTU's?
A. 970.3
B. 33,472 BTU
, C. 125,000 BTU
D. 288,000 BTU
B. 33,472 BTU
A British Thermal Unit is
A. the amount of heat needed to raise 1 lb of water 1F
B. the amount of heat needed to raise 1 lb of steam 1F
C. A unit of temperature measurement
D. the amount of heat in water between freezing and boiling
A. The amount of heat needed to raise 1 lb of water 1F
Hydronic heat is:
A. Steam heat
B. Hot water heat
C. Radiant heat
D. Heat of evaporation
B. Hot water heat
Superheated steam is:
A. reheated steam
B. very hot steam
C. flash steam
D. saturated steam
B. Very hot steam
2,545 Btuh represents:
A. 1 brake horsepower
B. 1 kilowatt-hour
C. 1 horsepower-hour
D. 1 therm
C. 1 horsepower-hour
A throttling calorimeter is used to measure the quality of:
A. dry steam
B. saturated steam
C. superheated steam
D. BTU in coal
B. saturated steam
