Motor Vehicle Fuel Tanks Exam Practice

FDNY P53 Supervision of De-Fueling Motor Vehicle Fuel Tanks Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of supervising the de-fueling of motor

vehicle fuel tanks?

• To maximize fuel recovery
• To ensure safety and prevent fire or explosion hazards
• To reduce fuel costs
• To speed up vehicle maintenance

Rationale: The main goal is safety. De-fueling involves flammable liquids,

so supervision ensures proper procedures and hazard prevention.

• Which type of fire extinguisher is recommended near a de-fueling

operation? 1 / 4

• Water
• Foam
• Dry chemical (Class B)
• Wet chemical

Rationale: Dry chemical extinguishers are suitable for flammable liquids

like gasoline or diesel.

• What is the minimum distance a vehicle should be from buildings

during de-fueling?

• 5 feet
• 10 feet
• 20 feet
• 50 feet

Rationale: Maintaining at least 20 feet helps minimize fire and explosion

risk near structures.

• When should ignition sources be eliminated in a de-fueling area?
• Only during refueling
• Before and during de-fueling operations
• Only if a spill occurs
• Only after de-fueling is complete

Rationale: Any ignition source must be removed before and during de-

fueling to prevent fire. 2 / 4

• What PPE is essential for personnel supervising de-fueling?
• Gloves and safety shoes
• Flame-resistant clothing, gloves, eye protection, and face shield
• Hearing protection only
• Standard work uniform

Rationale: Flame-resistant PPE protects workers from sparks, splashes, or

fire hazards.

• What is the recommended method for grounding a vehicle before de-

fueling?

• Touch the vehicle with your hand
• Attach a wire to the battery only
• Use a grounding cable connected to the chassis and a known

ground point

• No grounding is necessary

Rationale: Proper grounding prevents static electricity buildup, reducing

ignition risk.

• Which of the following is a common hazard associated with de-fueling

diesel vehicles?

• Gasoline vapors
• Diesel fuel spills and slip hazards
• Oxygen depletion
• Electrical shock 3 / 4

Rationale: Diesel is less volatile than gasoline but can create slip hazards

and environmental contamination.

• Which system should be used to safely collect fuel from a vehicle

tank?

• Hand pump only
• Funnel and bucket
• Approved fuel transfer pump and container
• Hose and open tank

Rationale: Approved pumps and containers prevent spills and exposure to

vapors.

• How often should supervisors inspect fuel transfer equipment?
• Weekly
• Monthly
• Before each use
• Yearly

Rationale: Inspecting before use ensures equipment integrity and reduces

accident risk.

• What is the maximum allowable quantity of fuel in a portable

container during transfer?

• 5 gallons
• 10 gallons
• / 4