Operator Exam Practice Questions And

FDNY P99 Low Pressure Oil Burner Operator Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which type of fuel is typically used in low-pressure oil burners?
• Diesel only
• Gasoline
• No. 2 fuel oil
• Propane

Rationale: Low-pressure oil burners are designed to operate on No. 2

fuel oil, which is standard heating oil in commercial and residential systems.

• What is the primary purpose of a low-pressure oil burner?
• Produce electricity 1 / 4

• Generate heat
• Power vehicles
• Refine fuel

Rationale: The primary function of a low-pressure oil burner is to

combust fuel oil efficiently to produce heat for residential or commercial heating systems.

• Which component controls the fuel flow in a low-pressure oil burner?
• Ignition transformer
• Oil pump
• Combustion chamber
• Draft regulator

Rationale: The oil pump is responsible for supplying and regulating

fuel flow from the tank to the burner nozzle.

• What device ignites the fuel-air mixture in a low-pressure oil burner?
• Thermostat
• Fuel filter
• Ignition electrodes
• Flame sensor

Rationale: Ignition electrodes produce a spark that ignites the

atomized fuel in the combustion chamber.

• What is the function of the burner nozzle?
• Increase oil viscosity
• Filter impurities 2 / 4

• Atomize fuel into a fine spray
• Regulate air intake

Rationale: The nozzle atomizes the fuel to ensure proper mixing with

air for efficient combustion.

• Which of the following can cause incomplete combustion in a low-

pressure oil burner?

• Clean fuel
• Proper air adjustment
• Clogged nozzle
• Proper ignition

Rationale: A clogged nozzle restricts fuel flow, leading to incomplete

combustion and soot formation.

• What is the typical operating pressure for a low-pressure oil burner

nozzle?

• 50 psi
• 100 psi
• 200 psi
• 300 psi

Rationale: Standard low-pressure oil burners operate at

approximately 100 psi to achieve proper atomization.

• What should be checked first during routine burner maintenance?
• Combustion chamber
• Air intake 3 / 4

• Fuel supply and filter
• Thermostat

Rationale: Ensuring the fuel supply and filter are clean prevents

operational issues and maintains burner efficiency.

• Which color flame indicates proper combustion in a low-pressure oil

burner?

• Blue with yellow tips
• Blue
• Orange
• Black

Rationale: A blue flame indicates complete combustion, while yellow

or orange flames suggest incomplete combustion or poor atomization.

• What is the function of the primary control in an oil burner?
• Adjust the fuel nozzle
• Measure combustion efficiency
• Control the ignition and safety shutdown sequence
• Regulate air intake

Rationale: The primary control governs the startup sequence, flame

detection, and safety shutdown of the burner.

• What is the purpose of a flame sensor or cad cell?
• Control fuel pressure
• Clean the nozzle automatically
• / 4