FDNY P-99 C OF F EXAM SCRIPT 2025/2026 QUESTIONS
WITH ANSWERS GRADED A+
✔✔Where are shut off valves required? - ✔✔One at the supply line at the tank and and
one at the supply line at the burner
✔✔What stops the flow of oil? - ✔✔Remote control
✔✔Where is the remote control located? - ✔✔As close to the entrance of the boiler
room as practical or immediately inside as long as it's accessible at all times. On tank if
60 gal or less
✔✔What are the 4 safety controls implemented? - ✔✔Oil temperature control, ignition,
stack/combustion control, and high pressure and temperature control.
✔✔Is a chimney required to install a burner? - ✔✔Yes
✔✔What temperature is no. 6 oil heated to in the tank? - ✔✔100-130 degrees
✔✔What does excessive readings in the vacuum gauge indicate? - ✔✔Obstruction in
the the suction line, strainer must be cleaned
✔✔What temperature do preheaters further heat the oil to? - ✔✔160-180 degrees
✔✔When will the main fuel valve shut down the burner? - ✔✔When there's a failure of
ignition or combustion
✔✔What is the purpose of the oil return line? - ✔✔To circulate oil that hasn't been
atomized back into storage
✔✔When is the back pressure relief valve necessary? - ✔✔When the pressure in the
burner is too great
✔✔What is normal pressure during combustion of no. 6 oil? - ✔✔30-50 psi
✔✔What is combustion and what is the result? - ✔✔The chemical union of oxygen in
the air and combustible elements in oil (hydrogen and carbon). The result is heat
energy.
✔✔What percent of oil is carbon? - ✔✔85%
✔✔What percent of oil is hydrogen? - ✔✔14%
, ✔✔Can oil burn? Why or why not? - ✔✔No it is a liquid fuel and must be changed into a
gas or vapor to burn
✔✔What process must take place before oil is burned? - ✔✔Vaporization/Atomization
✔✔At what pressure is the oil and air mixture delivered to the nozzle? - ✔✔1-15 psi
✔✔What is air that contacts the oil before it leave the nozzle called? - ✔✔Primary air
✔✔How much air do burners require per gallon of oil burner? - ✔✔2000 cubic feet
✔✔When properly performed, how much heat is produced for each pound of carbon? -
✔✔14,544 BTV
✔✔When incompletely performed, how much heat is produced per pound of carbon
burned? - ✔✔4,480 BTV
✔✔What color is the flame of of a complete process of combustion? - ✔✔Orange body
with red, slightly cloudy tips
✔✔What is indicated when the flame is red and smoky? - ✔✔Lack of oxygen
✔✔What is indicated when the flame is white and dazzling? - ✔✔Excess air
✔✔What can be a result of insufficient air supply? - ✔✔Dense, black smoke and soot
✔✔What can happen to the flame of there is an excess air supply? - ✔✔The flame can
go out
✔✔What will happen if oil and air mixture contacts walls of combustion chamber? -
✔✔Will cause a smoky fire, which leads to carbon build up on walls and burner failure
✔✔What is reflected heat? - ✔✔Heat that is channeled back to combustion chamber to
maintain fire after the ignition is turned off.
✔✔At what temperature is oil stored at? - ✔✔Just above 100 degrees
✔✔What temperature is fuel raised to before entering combustion chamber? - ✔✔180
degrees
✔✔What can lead to after drip? - ✔✔A defective oil cut off valve, allows oil to drip into
combustion chamber while burner is off. Carbon build up.
WITH ANSWERS GRADED A+
✔✔Where are shut off valves required? - ✔✔One at the supply line at the tank and and
one at the supply line at the burner
✔✔What stops the flow of oil? - ✔✔Remote control
✔✔Where is the remote control located? - ✔✔As close to the entrance of the boiler
room as practical or immediately inside as long as it's accessible at all times. On tank if
60 gal or less
✔✔What are the 4 safety controls implemented? - ✔✔Oil temperature control, ignition,
stack/combustion control, and high pressure and temperature control.
✔✔Is a chimney required to install a burner? - ✔✔Yes
✔✔What temperature is no. 6 oil heated to in the tank? - ✔✔100-130 degrees
✔✔What does excessive readings in the vacuum gauge indicate? - ✔✔Obstruction in
the the suction line, strainer must be cleaned
✔✔What temperature do preheaters further heat the oil to? - ✔✔160-180 degrees
✔✔When will the main fuel valve shut down the burner? - ✔✔When there's a failure of
ignition or combustion
✔✔What is the purpose of the oil return line? - ✔✔To circulate oil that hasn't been
atomized back into storage
✔✔When is the back pressure relief valve necessary? - ✔✔When the pressure in the
burner is too great
✔✔What is normal pressure during combustion of no. 6 oil? - ✔✔30-50 psi
✔✔What is combustion and what is the result? - ✔✔The chemical union of oxygen in
the air and combustible elements in oil (hydrogen and carbon). The result is heat
energy.
✔✔What percent of oil is carbon? - ✔✔85%
✔✔What percent of oil is hydrogen? - ✔✔14%
, ✔✔Can oil burn? Why or why not? - ✔✔No it is a liquid fuel and must be changed into a
gas or vapor to burn
✔✔What process must take place before oil is burned? - ✔✔Vaporization/Atomization
✔✔At what pressure is the oil and air mixture delivered to the nozzle? - ✔✔1-15 psi
✔✔What is air that contacts the oil before it leave the nozzle called? - ✔✔Primary air
✔✔How much air do burners require per gallon of oil burner? - ✔✔2000 cubic feet
✔✔When properly performed, how much heat is produced for each pound of carbon? -
✔✔14,544 BTV
✔✔When incompletely performed, how much heat is produced per pound of carbon
burned? - ✔✔4,480 BTV
✔✔What color is the flame of of a complete process of combustion? - ✔✔Orange body
with red, slightly cloudy tips
✔✔What is indicated when the flame is red and smoky? - ✔✔Lack of oxygen
✔✔What is indicated when the flame is white and dazzling? - ✔✔Excess air
✔✔What can be a result of insufficient air supply? - ✔✔Dense, black smoke and soot
✔✔What can happen to the flame of there is an excess air supply? - ✔✔The flame can
go out
✔✔What will happen if oil and air mixture contacts walls of combustion chamber? -
✔✔Will cause a smoky fire, which leads to carbon build up on walls and burner failure
✔✔What is reflected heat? - ✔✔Heat that is channeled back to combustion chamber to
maintain fire after the ignition is turned off.
✔✔At what temperature is oil stored at? - ✔✔Just above 100 degrees
✔✔What temperature is fuel raised to before entering combustion chamber? - ✔✔180
degrees
✔✔What can lead to after drip? - ✔✔A defective oil cut off valve, allows oil to drip into
combustion chamber while burner is off. Carbon build up.
