MA 2nd Class Fireman's Practice Exam Latest Version 2023 2024 Questions and Verified Correct Answers 100% Pass Rate at First Attempt 2,545 Btu represents
- 1 bhp
- 1 kilowatt-hour
- 1 horsepower-hour
- 1 therm - Correct Answerc) 1 horsepower-hour
A 2-inch boiler tube has a wall thickness of 3/16 inch. What is its inside diameter (ID)?
- 2-3/16 inches
- 2 inches
- 1-13/16 inches
d)1-5/8 inches - Correct Answerd) 1-5/8 inches
A boiler has a steaming capacity of 34,500 lb of steam per hour. The evaporation rate is 10lb/ft^2 of heating surface per hour. What is the boiler heating surface?
- 100
- 1,000
- 3,450
- 6,900 - Correct Answerc) 3,450
A boiler has a steaming capacity of 35,500 lb of steam per hour. The evaporation rate is 10 lb/ft^2 of heating surface per hour. What is the horsepower rating of this boiler?
- 100
- 1,000
- 3,450
- 6,900 - Correct Answerb) 1,000
A boiler horsepower is defined as
- 970.3 Btuh.
- total heating surface times the factor of evaporation.
- evaporation of 34.5 lb of water from and at 212 degrees Fahrenheit per hour
- evaporation of 34.5 lb of water from and at 212 degrees Fahrenheit per 8 hours. -
Correct Answerc) evaporation of 34.5 lb of water from and at 212 degrees Fahrenheit per hour
A boiler operating at 100 PSI has a dry saturated steam temperature of 338 degrees F.What is the boilers water temperature? 1 / 3
- 180 degrees F
- 212 degrees F
- 309 degrees F
- 338 degrees F - Correct Answerd) 338 degrees F
A boiler's steam pressure gauge reads 150. What is the absolute pressure?
- 14.7
- 135.3
- 150
- 164.7 - Correct Answerc) 150
A British thermal unit is
- the amount of heat needed to raise one pound of water one degree F
- the amount of heat needed to raise one pound of steam one degree F
- a unit of temperature measurement.
- the amount of heat in water between freezing and boiling. - Correct Answera) the
amount of heat needed to raise one pound of water one degree F
A downcomer is
- located in a fire-tube boiler
- one of the tubes that supports the furnace
- used to circulate flue gas
- found in a water-tube boiler - Correct Answerd) found in a water-tube boiler
A dry pipe is used to
- separate moisture from steam as it leaves the drum.
- separate moisture from steam as it leaves the superheater.
- separate moisture from steam at the turbine throttle.
- increase superheater temperature. - Correct Answera) separate moisture from steam
as it leaves the drum
A fusible plug melts at
- 212 degrees F
- 450 degrees F
- 1,000 degrees F
- none of the above - Correct Answerb) 450 degrees F
A high-pressure boiler has its safety valve set above
- 15 PSI
- 100 PSI
- 125 PSI
- 150 PSI - Correct Answera) 15 PSI
A hot-water heating system is about to be started. How full of water should the expansion tank gauge glass be?
a) Empty 2 / 3
- 1/3
- 3/4
d) Full - Correct Answerb) 1/3
A siphon or pigtail is used to protect a steam pressure gauge
- from steam temperature
- against high steam pressure
- against high water pressure
- against an excessive amount of steam - Correct Answera) from steam temperature
A telltale hole is found in a
- dry pipe
- crown sheet
- fusible plug
- stay bolt - Correct Answerd) stay bolt
A therm is equal to how many Btu?
- 970.3
- 33,475
- 100,000
- 1,000,000 - Correct Answerc) 100,000
A throttling calorimeter is used to measure the quality of
- dry steam
- saturated steam
- superheated steam
d) Btu in coal - Correct Answerb) saturated steam
A tube in a fire-tube boiler is surrounded by
- water
- air
- flue gases
- steam - Correct Answera) water
After installing a new gauge glass, the proper procedure for returning the glass to service is
- crack open both the top and bottom valves
- open the drain and crack both the bottom and top valves
- open the drain and crack open the top valve
- open the drain and crack open the bottom valve - Correct Answerc) open the drain
and crack open the top valve
An automatic feedwater regulator
- ensures the proper water level in the boiler
- shuts off the burner
- controls the boiler's operating range
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