FDNY P-99 C OF F FINAL PAPER 2025/2026 QUESTIONS
WITH ANSWERS GRADED A+
✔✔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.
✔✔What leads to oil leaking on the floor in front of the unit? - ✔✔A bad seal on the oil
pump shaft
✔✔How often should nozzles and rotary cups be cleaned on a no. 6 oil burner? -
✔✔Daily
✔✔What will cause boiler room to be filled with smoke? - ✔✔Blockage in the chimney or
flue passage
✔✔What will water in fuel oil cause? - ✔✔Improper atomization
✔✔What is the most common cause of a puff back? - ✔✔A delay in ignition
✔✔What is the purpose of a protective relay? - ✔✔To shut down burners if a flame is
not established quickly
✔✔What can happen if a combustion chamber is not preheated? - ✔✔Oil burner system
gets filled with vaporized oil fumes. Indicated by strong odor
✔✔Where is fuel oil stored? - ✔✔In oil storage tank
✔✔What is the purpose of the tank shut off valve? - ✔✔Stop the flow of oil for purpose
of maintenance or emergency
✔✔What is an oil strainer? - ✔✔The oil strainer prevents sediment and dirt in oil from
storage tank from entering combustion chamber
✔✔What is the vacuum gauge for? - ✔✔To indicate whether there is an obstruction in
the suction line
✔✔What is the purpose of the preheater? - ✔✔To raise temperature of oil for efficiency
in pumping and atomization
✔✔What is the main fuel valve? - ✔✔An electrically operated valve that will open or
close the line leading to the atomizer.
WITH ANSWERS GRADED A+
✔✔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.
✔✔What leads to oil leaking on the floor in front of the unit? - ✔✔A bad seal on the oil
pump shaft
✔✔How often should nozzles and rotary cups be cleaned on a no. 6 oil burner? -
✔✔Daily
✔✔What will cause boiler room to be filled with smoke? - ✔✔Blockage in the chimney or
flue passage
✔✔What will water in fuel oil cause? - ✔✔Improper atomization
✔✔What is the most common cause of a puff back? - ✔✔A delay in ignition
✔✔What is the purpose of a protective relay? - ✔✔To shut down burners if a flame is
not established quickly
✔✔What can happen if a combustion chamber is not preheated? - ✔✔Oil burner system
gets filled with vaporized oil fumes. Indicated by strong odor
✔✔Where is fuel oil stored? - ✔✔In oil storage tank
✔✔What is the purpose of the tank shut off valve? - ✔✔Stop the flow of oil for purpose
of maintenance or emergency
✔✔What is an oil strainer? - ✔✔The oil strainer prevents sediment and dirt in oil from
storage tank from entering combustion chamber
✔✔What is the vacuum gauge for? - ✔✔To indicate whether there is an obstruction in
the suction line
✔✔What is the purpose of the preheater? - ✔✔To raise temperature of oil for efficiency
in pumping and atomization
✔✔What is the main fuel valve? - ✔✔An electrically operated valve that will open or
close the line leading to the atomizer.
