1. A fuse is necessary for a circuit with a load A. 100 amps. Note:
of 21,000 watts and a voltage of 220 volts. V = IR Therefore I
A. 100 = V/R 21,000 amps
B. 150 /220 volts = 95
C. 175 amps
D. 200
2. At 0 psig, how many BTU's are required to change 1 C. 970 BTU
lb of water at 212F to steam?
A. 144
B. 180
C. 970
D. 1190
3. Radiation is: D. Heat transfer by
A. the movement of liquids or gases created by a waves
temperature difference.
B. Heat transfer by direct molecular contact
C. the weight of a substance compared to unity
D. Heat transfer by waves
4. Sensible heat is: B. Heat quantity
A. An established relationship comparing any sub- that can be felt
stance to the heat content of water. or measured by a
B. Heat quantity that can be felt or measured by a thermometer
thermometer
C. Heat quantity above the saturation point
D. Measure of heat intensity
5. All steam lines should be pitched: A. In the direction
A. In the direction of flow of flow
B. Back towards the boiler
C. Level
D. For convenience
6. Draw a simple picture of a Sterling Boiler. Label it.
, Stationary Engineer License Exam Prep
7. 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
8. Draw a picture of a Scotch Boiler. Label the firebox,
combustion chamber, crown sheet, tubes, feed water
inlet, steam outlet, stack, Economizer and Super-
heater.
9. Draw a picture of a Firetube Boiler. Label it.
10. Draw a picture of a Locomotive Fire Tube Boiler.
Label it.
11. Increasing the pressure will have what effect on the C - higher Boiling
boiling point of water? Point
A. No change
B. Lower BP
, Stationary Engineer License Exam Prep
C. Higher BP
D. Temperature will increase 2F for every psi
12. Heat absorbed by water when is changes from liquid B. Latent Heat
to steam at the boiling point is called:
A. Sensible heat
B. Latent heat
C. Specific heat
D. Super heat
13. Heat may be transferred in how many ways? C. 3 ways: con-
A. 1 duction, convection
B. 2 and radiation
C. 3
D. 4
14. A boiler horsepower is defined as: C. evaporation of
A. 970.3 BTU 34.5 lb of water and
B. Total heating surface times the evaporation factor at 212F per hour
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
15. A boiler's steam pressure gauge reads 150 psig. D. 164.7 psia (150
What is the absolute pressure? psig + 14.7 psi =
A. 14.7 psia 164.7 psia)
B. 135.3 psia
C. 150 psia
D. 164.7 psia
16. What does 212F equal on the Celsius scale? B. 100C
A. 32C
B. 100C
C. 180C
D. 970.3C
17. One boiler horsepower is equal to how many BTU's? B. 33,472 BTU
A. 970.3
B. 33,472 BTU
, Stationary Engineer License Exam Prep
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C. 125,000 BTU
D. 288,000 BTU
18. A British Thermal Unit is A. The amount of
A. the amount of heat needed to raise 1 lb of water heat needed to
1F raise 1 lb of water
B. the amount of heat needed to raise 1 lb of steam 1F
1F
C. A unit of temperature measurement
D. the amount of heat in water between freezing and
boiling
19. Hydronic heat is: B. Hot water heat
A. Steam heat
B. Hot water heat
C. Radiant heat
D. Heat of evaporation
20. Superheated steam is: B. Very hot steam
A. reheated steam
B. very hot steam
C. flash steam
D. saturated steam
21. 2,545 Btuh represents: C. 1 horsepow-
A. 1 brake horsepower er-hour
B. 1 kilowatt-hour
C. 1 horsepower-hour
D. 1 therm
22. A throttling calorimeter is used to measure the qual- B. saturated steam
ity of:
A. dry steam
B. saturated steam
C. superheated steam
D. BTU in coal
23. The amount of heat in 1 lb of saturated steam is B. 1,150 BTU
approximately
A. 970.3 BTU