HOSMERIT
MA 2ND CLASS FIREMAN'S PRACTICE EXAM
2025 QUESTIONS WITH VERIFIED SOLUTIONS |
RATED A+
At 0 PSIG, how many BTU are necessary to change 1 lb of water at 212 degrees
Fahrenheit into 1 lb of steam?
a. 144
b. 180
c. 970
d. 1,190 - correct answer- c) 970
Radiation is
a. the movement of liquids or gases created by a temperature 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. - correct answer- d) a form of heat transfer by
waves.
Steam at 100 PSI and 400 degrees Fahrenheit is
a. saturated.
b. wet.
c. superheated.
d. none of the above. - correct answer- c) superheated
Which of the following most closely defines sensible heat?
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 point of saturation
d. Measure of heat intensity. - correct answer- b) Heat quantity that can be felt or
measured by a thermometer
What is required to raise the temperature of 1 lb of water from 32 degrees to 212
degrees Fahrenheit?
a. 144 Btu
b. 180 Btu
c. 970.3 Btu
d. Saturated heat - correct answer- b) 180 Btu
Increasing the pressure has what effect on the boiling point of water?
a. No change
b. Temperature will be lowered
c. Temperature will be raised
d. Temperature will increase 2 degrees Fahrenheit for every PSI - correct answer- c)
Temperature will be raised
Heat absorbed by water when it changes from liquid to steam at the boiling point is
called
a. sensible heat.
b. latent heat.
c. specific heat.
d. superheat - correct answer- b) latent heat
Heat may be transferred in how many ways?
a. One
b. Two
, c. Three
d. Four - correct answer- c) Three
A boiler horsepower is defined as
a. 970.3 Btuh.
b. total heating surface times the factor of evaporation.
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. -
correct answer-
c) evaporation of 34.5 lb of water from and at 212 degrees Fahrenheit per hour
A boiler's steam pressure gauge reads 150. What is the absolute pressure?
a. 14.7
b. 135.3
c. 150
d. 164.7 - correct answer- c) 150
What does 212 degrees F equal on the Celsius scale?
a. 32
b. 100
c. 180
d. 970.3 - correct answer- b) 100
One boiler horsepower is equal to how many Btu?
a. 970.3
b. 33,472
c. 125,000
d. One therm - correct answer- b) 33,472
MA 2ND CLASS FIREMAN'S PRACTICE EXAM
2025 QUESTIONS WITH VERIFIED SOLUTIONS |
RATED A+
At 0 PSIG, how many BTU are necessary to change 1 lb of water at 212 degrees
Fahrenheit into 1 lb of steam?
a. 144
b. 180
c. 970
d. 1,190 - correct answer- c) 970
Radiation is
a. the movement of liquids or gases created by a temperature 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. - correct answer- d) a form of heat transfer by
waves.
Steam at 100 PSI and 400 degrees Fahrenheit is
a. saturated.
b. wet.
c. superheated.
d. none of the above. - correct answer- c) superheated
Which of the following most closely defines sensible heat?
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 point of saturation
d. Measure of heat intensity. - correct answer- b) Heat quantity that can be felt or
measured by a thermometer
What is required to raise the temperature of 1 lb of water from 32 degrees to 212
degrees Fahrenheit?
a. 144 Btu
b. 180 Btu
c. 970.3 Btu
d. Saturated heat - correct answer- b) 180 Btu
Increasing the pressure has what effect on the boiling point of water?
a. No change
b. Temperature will be lowered
c. Temperature will be raised
d. Temperature will increase 2 degrees Fahrenheit for every PSI - correct answer- c)
Temperature will be raised
Heat absorbed by water when it changes from liquid to steam at the boiling point is
called
a. sensible heat.
b. latent heat.
c. specific heat.
d. superheat - correct answer- b) latent heat
Heat may be transferred in how many ways?
a. One
b. Two
, c. Three
d. Four - correct answer- c) Three
A boiler horsepower is defined as
a. 970.3 Btuh.
b. total heating surface times the factor of evaporation.
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. -
correct answer-
c) evaporation of 34.5 lb of water from and at 212 degrees Fahrenheit per hour
A boiler's steam pressure gauge reads 150. What is the absolute pressure?
a. 14.7
b. 135.3
c. 150
d. 164.7 - correct answer- c) 150
What does 212 degrees F equal on the Celsius scale?
a. 32
b. 100
c. 180
d. 970.3 - correct answer- b) 100
One boiler horsepower is equal to how many Btu?
a. 970.3
b. 33,472
c. 125,000
d. One therm - correct answer- b) 33,472
