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P-99 Low Pressure Boiler COF FDNY Newest
2025/2026 Complete 100 Questions And Correct
Detailed Answers (Verified Answers) |Brand New
Version!!
Low pressure steam boilers are defined as having a maximum operating
pressure of:
A. 30 psi
B. 15 psi
C. 100 psi
D. 25 psi
Answer: B. 15 psi
Low pressure hot water boilers are defined as operating at a maximum
temperature of:
A. 212°F
B. 250°F
C. 275°F
D. 300°F
Answer: B. 250°F
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The main purpose of a safety valve on a boiler is to:
A. Control steam pressure
B. Prevent overpressure explosions
C. Maintain water level
D. Regulate fuel input
Answer: B. Prevent overpressure explosions
How often must the boiler logbook be updated by the operator?
A. Weekly
B. Daily
C. Monthly
D. Only during inspections
Answer: B. Daily
Which device is used to indicate the water level inside a boiler?
A. Thermostat
B. Sight glass (gauge glass)
C. Safety valve
D. Steam trap
Answer: B. Sight glass (gauge glass)
What is the minimum number of low water cutoffs required on a low
pressure boiler?
A. None
B. One
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C. Two
D. Three
Answer: B. One
The blowdown valve on a boiler is used to:
A. Increase steam production
B. Remove sludge and sediment from the boiler
C. Adjust water pressure
D. Reset the burner
Answer: B. Remove sludge and sediment from the boiler
What is the maximum allowable working pressure for a low pressure hot
water boiler?
A. 15 psi
B. 25 psi
C. 30 psi
D. 160 psi
Answer: D. 160 psi
The boiler room must have sufficient:
A. Lighting only
B. Ventilation and combustion air supply
C. Windows
D. Emergency exits every 10 feet
Answer: B. Ventilation and combustion air supply
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Which fuel is most commonly used in NYC low pressure boilers?
A. Wood pellets
B. Oil and natural gas
C. Propane only
D. Diesel only
Answer: B. Oil and natural gas
When testing a safety valve, you should:
A. Tap it with a hammer
B. Lift the try lever
C. Close the valve completely
D. Remove it for inspection
Answer: B. Lift the try lever
In case of a low-water condition, the operator should first:
A. Add water quickly
B. Shut down the burner immediately
C. Open the blowdown valve
D. Reset the pressure control
Answer: B. Shut down the burner immediately
What is the color of a natural gas flame under proper combustion?
A. Yellow and smoky
B. Blue with little or no yellow
C. Red with orange tips
P-99 Low Pressure Boiler COF FDNY Newest
2025/2026 Complete 100 Questions And Correct
Detailed Answers (Verified Answers) |Brand New
Version!!
Low pressure steam boilers are defined as having a maximum operating
pressure of:
A. 30 psi
B. 15 psi
C. 100 psi
D. 25 psi
Answer: B. 15 psi
Low pressure hot water boilers are defined as operating at a maximum
temperature of:
A. 212°F
B. 250°F
C. 275°F
D. 300°F
Answer: B. 250°F
,2|Page
The main purpose of a safety valve on a boiler is to:
A. Control steam pressure
B. Prevent overpressure explosions
C. Maintain water level
D. Regulate fuel input
Answer: B. Prevent overpressure explosions
How often must the boiler logbook be updated by the operator?
A. Weekly
B. Daily
C. Monthly
D. Only during inspections
Answer: B. Daily
Which device is used to indicate the water level inside a boiler?
A. Thermostat
B. Sight glass (gauge glass)
C. Safety valve
D. Steam trap
Answer: B. Sight glass (gauge glass)
What is the minimum number of low water cutoffs required on a low
pressure boiler?
A. None
B. One
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C. Two
D. Three
Answer: B. One
The blowdown valve on a boiler is used to:
A. Increase steam production
B. Remove sludge and sediment from the boiler
C. Adjust water pressure
D. Reset the burner
Answer: B. Remove sludge and sediment from the boiler
What is the maximum allowable working pressure for a low pressure hot
water boiler?
A. 15 psi
B. 25 psi
C. 30 psi
D. 160 psi
Answer: D. 160 psi
The boiler room must have sufficient:
A. Lighting only
B. Ventilation and combustion air supply
C. Windows
D. Emergency exits every 10 feet
Answer: B. Ventilation and combustion air supply
, 4|Page
Which fuel is most commonly used in NYC low pressure boilers?
A. Wood pellets
B. Oil and natural gas
C. Propane only
D. Diesel only
Answer: B. Oil and natural gas
When testing a safety valve, you should:
A. Tap it with a hammer
B. Lift the try lever
C. Close the valve completely
D. Remove it for inspection
Answer: B. Lift the try lever
In case of a low-water condition, the operator should first:
A. Add water quickly
B. Shut down the burner immediately
C. Open the blowdown valve
D. Reset the pressure control
Answer: B. Shut down the burner immediately
What is the color of a natural gas flame under proper combustion?
A. Yellow and smoky
B. Blue with little or no yellow
C. Red with orange tips
