Page | 1
FDNY P-99 C OF F EXAM 2025 BRAND
NEW ACTUAL EXAM WITH 100% VERIFIED
QUESTIONS AND CORRECT SOLUTIONS|
ACE YOUR GRADES.
1. What can happen if a combustion chamber is not preheated? -
correct answer -Oil burner system gets filled with vaporized oil
fumes. Indicated by strong odor
2. Where is fuel oil stored? - correct answer -In oil storage tank
, Page | 2
3. What is the purpose of the tank shut off valve? - correct answer
-Stop the flow of oil for purpose of maintenance or emergency
4. What is an oil strainer? - correct answer -The oil strainer
prevents sediment and dirt in oil from storage tank from
entering combustion chamber
5. What is the vacuum gauge for? - correct answer -To indicate
whether there is an obstruction in the suction line
6. What is the purpose of the preheater? - correct answer -To
raise temperature of oil for efficiency in pumping and
atomization
7. What is the main fuel valve? - correct answer -An electrically
operated valve that will open or close the line leading to the
atomizer.
8. Why is the main fuel valve located as close to the burner as
possible? - correct answer -To minimize the amount of oil
remaining in the burner line in case of an emergency shut off.
, Page | 3
9. What device atomizes or breaks up the oil? - correct answer -
Atomizing cup or spinner
10. When will the vaporstat shut down the burner? - correct
answer -When there is no air being provided in the process of
combustion
11. What is the mixture of fuel and air ignited by? - correct
answer -Gas pilot or electric ignition
12. When does the photoelectric cell shut down the boiler? -
correct answer -When there is no flame present in the
combustion chamber
13. What is the purpose of the aquastat? - correct answer -It
operates the oil burner in the summer for domestic hot water
needs
FDNY P-99 C OF F EXAM 2025 BRAND
NEW ACTUAL EXAM WITH 100% VERIFIED
QUESTIONS AND CORRECT SOLUTIONS|
ACE YOUR GRADES.
1. What can happen if a combustion chamber is not preheated? -
correct answer -Oil burner system gets filled with vaporized oil
fumes. Indicated by strong odor
2. Where is fuel oil stored? - correct answer -In oil storage tank
, Page | 2
3. What is the purpose of the tank shut off valve? - correct answer
-Stop the flow of oil for purpose of maintenance or emergency
4. What is an oil strainer? - correct answer -The oil strainer
prevents sediment and dirt in oil from storage tank from
entering combustion chamber
5. What is the vacuum gauge for? - correct answer -To indicate
whether there is an obstruction in the suction line
6. What is the purpose of the preheater? - correct answer -To
raise temperature of oil for efficiency in pumping and
atomization
7. What is the main fuel valve? - correct answer -An electrically
operated valve that will open or close the line leading to the
atomizer.
8. Why is the main fuel valve located as close to the burner as
possible? - correct answer -To minimize the amount of oil
remaining in the burner line in case of an emergency shut off.
, Page | 3
9. What device atomizes or breaks up the oil? - correct answer -
Atomizing cup or spinner
10. When will the vaporstat shut down the burner? - correct
answer -When there is no air being provided in the process of
combustion
11. What is the mixture of fuel and air ignited by? - correct
answer -Gas pilot or electric ignition
12. When does the photoelectric cell shut down the boiler? -
correct answer -When there is no flame present in the
combustion chamber
13. What is the purpose of the aquastat? - correct answer -It
operates the oil burner in the summer for domestic hot water
needs
