MA_2nd_Class_Fireman_Practice_Exam_
Study_Guide
1. At 0 PSIG, how many BTU are necessary to change 1 lb c) 970
of water at 212 degrees Fahrenheit into 1 lb of steam?
a) 144
b) 180
c) 970
d) 1,190
2. Radiation is d) a form of heat transfer
a) the movement of liquids or gases created by a tem- by waves.
perature difference.
b) the transfer of heat by direct molecular contact.
c) the weight of a substance compared to unity.
d) a form of heat transfer by waves.
3. Steam at 100 PSI and 400 degrees Fahrenheit is c) superheated
a) saturated.
b) wet.
c) superheated.
d) none of the above.
4. Which of the following most closely defines sensible b) Heat quantity that can
heat? be felt or measured by a
a) An established relationship comparing any sub- thermometer
stance to the heat content of water
b) Heat quantity that can be felt or measured by a
thermometer.
c) Heat quantity above the point of saturation
d) Measure of heat intensity.
5. What is required to raise the temperature of 1 lb of b) 180 Btu
water from 32 degrees to 212 degrees Fahrenheit?
a) 144 Btu
, b) 180 Btu
c) 970.3 Btu
d) Saturated heat
6. Increasing the pressure has what effect on the boiling c) Temperature will be
point of water? raised
a) No change
b) Temperature will be lowered
c) Temperature will be raised
d) Temperature will increase 2 degrees Fahrenheit for
every PSI
7. Heat absorbed by water when it changes from liquid b) latent heat
to steam at the boiling point is called
a) sensible heat.
b) latent heat.
c) specific heat.
d) superheat
8. Heat may be transferred in how many ways? c) Three
a) One
b) Two
c) Three
d) Four
9. A boiler horsepower is defined as c) evaporation of 34.5 lb of
a) 970.3 Btuh. water from and at 212 de-
b) total heating surface times the factor of evapora- grees Fahrenheit per hour
tion.
c) evaporation of 34.5 lb of water from and at 212
degrees Fahrenheit per hour
d) evaporation of 34.5 lb of water from and at 212
degrees Fahrenheit per 8 hours.
, 10. A boiler's steam pressure gauge reads 150. What is c) 150
the absolute pressure?
a) 14.7
b) 135.3
c) 150
d) 164.7
11. What does 212 degrees F equal on the Celsius scale? b) 100
a) 32
b) 100
c) 180
d) 970.3
12. One boiler horsepower is equal to how many Btu? b) 33,472
a) 970.3
b) 33,472
c) 125,000
d) One therm
13. A British thermal unit is a) the amount of heat
a) the amount of heat needed to raise one pound of needed to raise one
water one degree F pound of water one de-
b) the amount of heat needed to raise one pound of gree F
steam one degree F
c) a unit of temperature measurement.
d) the amount of heat in water between freezing and
boiling.
14. Hydronic heat is b) hot water heat
a) steam heat
b) hot water heat
Study_Guide
1. At 0 PSIG, how many BTU are necessary to change 1 lb c) 970
of water at 212 degrees Fahrenheit into 1 lb of steam?
a) 144
b) 180
c) 970
d) 1,190
2. Radiation is d) a form of heat transfer
a) the movement of liquids or gases created by a tem- by waves.
perature difference.
b) the transfer of heat by direct molecular contact.
c) the weight of a substance compared to unity.
d) a form of heat transfer by waves.
3. Steam at 100 PSI and 400 degrees Fahrenheit is c) superheated
a) saturated.
b) wet.
c) superheated.
d) none of the above.
4. Which of the following most closely defines sensible b) Heat quantity that can
heat? be felt or measured by a
a) An established relationship comparing any sub- thermometer
stance to the heat content of water
b) Heat quantity that can be felt or measured by a
thermometer.
c) Heat quantity above the point of saturation
d) Measure of heat intensity.
5. What is required to raise the temperature of 1 lb of b) 180 Btu
water from 32 degrees to 212 degrees Fahrenheit?
a) 144 Btu
, b) 180 Btu
c) 970.3 Btu
d) Saturated heat
6. Increasing the pressure has what effect on the boiling c) Temperature will be
point of water? raised
a) No change
b) Temperature will be lowered
c) Temperature will be raised
d) Temperature will increase 2 degrees Fahrenheit for
every PSI
7. Heat absorbed by water when it changes from liquid b) latent heat
to steam at the boiling point is called
a) sensible heat.
b) latent heat.
c) specific heat.
d) superheat
8. Heat may be transferred in how many ways? c) Three
a) One
b) Two
c) Three
d) Four
9. A boiler horsepower is defined as c) evaporation of 34.5 lb of
a) 970.3 Btuh. water from and at 212 de-
b) total heating surface times the factor of evapora- grees Fahrenheit per hour
tion.
c) evaporation of 34.5 lb of water from and at 212
degrees Fahrenheit per hour
d) evaporation of 34.5 lb of water from and at 212
degrees Fahrenheit per 8 hours.
, 10. A boiler's steam pressure gauge reads 150. What is c) 150
the absolute pressure?
a) 14.7
b) 135.3
c) 150
d) 164.7
11. What does 212 degrees F equal on the Celsius scale? b) 100
a) 32
b) 100
c) 180
d) 970.3
12. One boiler horsepower is equal to how many Btu? b) 33,472
a) 970.3
b) 33,472
c) 125,000
d) One therm
13. A British thermal unit is a) the amount of heat
a) the amount of heat needed to raise one pound of needed to raise one
water one degree F pound of water one de-
b) the amount of heat needed to raise one pound of gree F
steam one degree F
c) a unit of temperature measurement.
d) the amount of heat in water between freezing and
boiling.
14. Hydronic heat is b) hot water heat
a) steam heat
b) hot water heat
