1|Page
FDNY P-99 Certificate of Fitness: Key Concepts &
Practice Questions 2026/2027 ||Verified Exam!!!|| Most
Recent Exam Actual Complete Real Exam Questions
And Correct Answers (Verified Answers) Already
Graded A+ ||Newest Exam!!!
What must the operator do during burner startup? -
Answer-Be present in the boiler room
What indicates incomplete combustion? - Answer-Black
smoke
What device measures pressure below atmospheric
pressure? - Answer-Vacuum gauge
What carries combustion gases outside? - Answer-
Chimney
What is the minimum passing score for FDNY COF
exams? - Answer-70%
What is the purpose of a safety relief valve? - Answer-
Prevent excessive pressure
,2|Page
What happens when too much air enters combustion? -
Answer-White dazzling flame
What fuel is commonly used in oil burners? - Answer-
Heating oil
What instrument measures boiler pressure? - Answer-
Pressure gauge
What component atomizes fuel oil? - Answer-Burner
nozzle
What flame indicates excess air? - Answer-White flame
What device prevents overheating? - Answer-Aquastat
What is the function of the chimney? - Answer-Remove
combustion gases
What should be done if burner flame fails? - Answer-Shut
down burner
, 3|Page
What does black smoke indicate? - Answer-Lack of air
Who issues the PI99 certificate? - Answer-FDNY
What device provides ignition for oil burners? - Answer-
Ignition transformer
What is the purpose of an oil pump? - Answer-Pump oil to
burner
What indicates poor combustion? - Answer-Smoke or soot
What must be checked before starting burner? - Answer-
Oil supply and safety controls
What is the main purpose of a boiler? - Answer-Produce
heat
What safety device prevents excessive pressure? -
Answer-Safety relief valve
FDNY P-99 Certificate of Fitness: Key Concepts &
Practice Questions 2026/2027 ||Verified Exam!!!|| Most
Recent Exam Actual Complete Real Exam Questions
And Correct Answers (Verified Answers) Already
Graded A+ ||Newest Exam!!!
What must the operator do during burner startup? -
Answer-Be present in the boiler room
What indicates incomplete combustion? - Answer-Black
smoke
What device measures pressure below atmospheric
pressure? - Answer-Vacuum gauge
What carries combustion gases outside? - Answer-
Chimney
What is the minimum passing score for FDNY COF
exams? - Answer-70%
What is the purpose of a safety relief valve? - Answer-
Prevent excessive pressure
,2|Page
What happens when too much air enters combustion? -
Answer-White dazzling flame
What fuel is commonly used in oil burners? - Answer-
Heating oil
What instrument measures boiler pressure? - Answer-
Pressure gauge
What component atomizes fuel oil? - Answer-Burner
nozzle
What flame indicates excess air? - Answer-White flame
What device prevents overheating? - Answer-Aquastat
What is the function of the chimney? - Answer-Remove
combustion gases
What should be done if burner flame fails? - Answer-Shut
down burner
, 3|Page
What does black smoke indicate? - Answer-Lack of air
Who issues the PI99 certificate? - Answer-FDNY
What device provides ignition for oil burners? - Answer-
Ignition transformer
What is the purpose of an oil pump? - Answer-Pump oil to
burner
What indicates poor combustion? - Answer-Smoke or soot
What must be checked before starting burner? - Answer-
Oil supply and safety controls
What is the main purpose of a boiler? - Answer-Produce
heat
What safety device prevents excessive pressure? -
Answer-Safety relief valve
