FDNY COF P-98 QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
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*Core Domains*
*- Fuel Oil Piping Systems*
*- Storage Tank Requirements*
*- Oil Burner Controls and Safety*
*- Emergency Shutdown Procedures*
*- Maintenance and Inspection*
*- NFPA and NYC Fire Code Compliance*
*- Venting and Combustion Air*
*- Fuel Oil Grade Classifications*
*Introduction*
*The purpose of this examination is to evaluate the competency of individuals seeking the Certificate of Fit
SECTION ONE: QUESTIONS 1–100
What is the primary purpose of a fusible link valve installed on an oil supply line?
A. To regulate oil pressure to the burner.
B. To provide a secondary shutoff during fuel leaks.
C. To stop the flow of oil automatically in the event of a fire.
D. To prevent the oil from freezing in cold weather.
🟢C
🔴 RATIONALE: A fusible link valve contains a metal alloy designed to melt at a specific temperature, which triggers the spring-loaded
valve to close, cutting off the fuel supply during a fire.
Which color marking is typically used to identify fill pipes for No. 2 fuel oil?
A. Yellow
B. Red
C. Green
D. Blue
,🟢A
🔴 RATIONALE: According to NYC fire regulations, fill pipes for oil storage tanks are color-coded to prevent the accidental delivery of
the wrong grade of fuel, with yellow designated for No. 2 oil.
How often must a P-98 certificate holder test the low-water cutoff on a boiler?
A. Weekly
B. Daily
C. Monthly
D. Annually
🟢B
🔴 RATIONALE: The low-water cutoff is a critical safety device that must be checked daily to ensure it is functioning correctly to
prevent boiler dry-firing and potential explosions.
If an oil burner fails to ignite, what is the first step the operator should take?
A. Manually bypass the safety controller.
B. Check the oil level in the tank.
C. Reset the primary control immediately.
D. Shut down the power and inspect for obvious mechanical issues.
🟢D
🔴 RATIONALE: Safety protocols dictate that power should be disconnected before inspecting equipment to prevent accidental ignition
or injury while troubleshooting a failure.
What is the maximum allowable capacity for a day tank inside a building without special enclosure?
A. 275 gallons
B. 550 gallons
C. 660 gallons
D. 1,100 gallons
🟢C
🔴 RATIONALE: The NYC Fire Code limits the capacity of day tanks stored inside buildings to 660 gallons unless they are installed in
a room with specific fire-rated construction.
Which device is designed to prevent a vacuum from forming inside an oil storage tank during delivery?
A. Relief valve
B. Vent pipe
C. Gauge glass
D. Check valve
, 🟢B
🔴 RATIONALE: The vent pipe allows air to enter or escape the tank, which is essential to prevent a vacuum when fuel is being
pumped out and to prevent pressure buildup during filling.
What is the maximum percentage of sulfur allowed in No. 4 fuel oil under current environmental regulations?
A. 0.0015%
B. 0.05%
C. 0.3%
D. 0.5%
🟢C
🔴 RATIONALE: Regulations restrict sulfur content in fuel oils to minimize air pollution, with 0.3% being the standard limit for No. 4 oil
in many urban jurisdictions.
Where should the emergency shutoff switch for an oil burner be located?
A. Directly inside the boiler room.
B. At the entrance to the boiler room.
C. Next to the oil storage tank.
D. On the roof near the chimney.
🟢B
🔴 RATIONALE: The emergency shutoff switch must be located at a point readily accessible from the entrance of the room containing
the burner to allow for a quick shutdown without entering the hazard zone.
An oil burner is producing heavy black smoke. What is the most likely cause?
A. Too much combustion air.
B. Insufficient combustion air.
C. The oil pressure is too low.
D. The fuel oil is too thin.
🟢B
🔴 RATIONALE: Black smoke indicates incomplete combustion, which is typically caused by a lack of sufficient oxygen (air) for the
amount of fuel being burned.
Which document must be maintained on the premises at all times?
A. The original purchase order for the boiler.
B. The manufacturer’s entire product catalog.
C. The maintenance and inspection logbook.
D. The personal tax records of the building owner.
DOWNLOAD PDF.
*Core Domains*
*- Fuel Oil Piping Systems*
*- Storage Tank Requirements*
*- Oil Burner Controls and Safety*
*- Emergency Shutdown Procedures*
*- Maintenance and Inspection*
*- NFPA and NYC Fire Code Compliance*
*- Venting and Combustion Air*
*- Fuel Oil Grade Classifications*
*Introduction*
*The purpose of this examination is to evaluate the competency of individuals seeking the Certificate of Fit
SECTION ONE: QUESTIONS 1–100
What is the primary purpose of a fusible link valve installed on an oil supply line?
A. To regulate oil pressure to the burner.
B. To provide a secondary shutoff during fuel leaks.
C. To stop the flow of oil automatically in the event of a fire.
D. To prevent the oil from freezing in cold weather.
🟢C
🔴 RATIONALE: A fusible link valve contains a metal alloy designed to melt at a specific temperature, which triggers the spring-loaded
valve to close, cutting off the fuel supply during a fire.
Which color marking is typically used to identify fill pipes for No. 2 fuel oil?
A. Yellow
B. Red
C. Green
D. Blue
,🟢A
🔴 RATIONALE: According to NYC fire regulations, fill pipes for oil storage tanks are color-coded to prevent the accidental delivery of
the wrong grade of fuel, with yellow designated for No. 2 oil.
How often must a P-98 certificate holder test the low-water cutoff on a boiler?
A. Weekly
B. Daily
C. Monthly
D. Annually
🟢B
🔴 RATIONALE: The low-water cutoff is a critical safety device that must be checked daily to ensure it is functioning correctly to
prevent boiler dry-firing and potential explosions.
If an oil burner fails to ignite, what is the first step the operator should take?
A. Manually bypass the safety controller.
B. Check the oil level in the tank.
C. Reset the primary control immediately.
D. Shut down the power and inspect for obvious mechanical issues.
🟢D
🔴 RATIONALE: Safety protocols dictate that power should be disconnected before inspecting equipment to prevent accidental ignition
or injury while troubleshooting a failure.
What is the maximum allowable capacity for a day tank inside a building without special enclosure?
A. 275 gallons
B. 550 gallons
C. 660 gallons
D. 1,100 gallons
🟢C
🔴 RATIONALE: The NYC Fire Code limits the capacity of day tanks stored inside buildings to 660 gallons unless they are installed in
a room with specific fire-rated construction.
Which device is designed to prevent a vacuum from forming inside an oil storage tank during delivery?
A. Relief valve
B. Vent pipe
C. Gauge glass
D. Check valve
, 🟢B
🔴 RATIONALE: The vent pipe allows air to enter or escape the tank, which is essential to prevent a vacuum when fuel is being
pumped out and to prevent pressure buildup during filling.
What is the maximum percentage of sulfur allowed in No. 4 fuel oil under current environmental regulations?
A. 0.0015%
B. 0.05%
C. 0.3%
D. 0.5%
🟢C
🔴 RATIONALE: Regulations restrict sulfur content in fuel oils to minimize air pollution, with 0.3% being the standard limit for No. 4 oil
in many urban jurisdictions.
Where should the emergency shutoff switch for an oil burner be located?
A. Directly inside the boiler room.
B. At the entrance to the boiler room.
C. Next to the oil storage tank.
D. On the roof near the chimney.
🟢B
🔴 RATIONALE: The emergency shutoff switch must be located at a point readily accessible from the entrance of the room containing
the burner to allow for a quick shutdown without entering the hazard zone.
An oil burner is producing heavy black smoke. What is the most likely cause?
A. Too much combustion air.
B. Insufficient combustion air.
C. The oil pressure is too low.
D. The fuel oil is too thin.
🟢B
🔴 RATIONALE: Black smoke indicates incomplete combustion, which is typically caused by a lack of sufficient oxygen (air) for the
amount of fuel being burned.
Which document must be maintained on the premises at all times?
A. The original purchase order for the boiler.
B. The manufacturer’s entire product catalog.
C. The maintenance and inspection logbook.
D. The personal tax records of the building owner.
