What is the correct refueling procedure to prevent fire hazards?

• A. Refuel with engine off, in a cool area, no ignition sources nearby, clean spills, and use approved containers.
• B. Refuel with engine running to speed up the process, near open flames.
• C. Refuel only when the tank is nearly empty.
• D. Refuel with engine off, but near ignition sources to test for leaks.

Answer: (D)

The main idea is to minimize fire risk during refueling by removing ignition sources and controlling fuel vapors. Refueling with the engine off eliminates sparks from the starter, electrical systems, or hot exhaust that could ignite vapors. Keeping the area cool helps reduce vapor pressure and slows evaporation, making ignition less likely. No ignition sources nearby—no flames, sparks, cigarettes, or hot equipment—remains the fundamental safeguard against vapors igniting. Cleaning up spills promptly prevents fuel from pooling and creating vapors or vapors migrating to ignition sources. Using approved containers ensures the fuel is stored and dispensed safely, with proper venting and resistance to leaks.

Testing for leaks should be done with the engine off and away from any ignition sources; testing near ignition sources would create a dangerous situation if vapors were exposed to a spark or flame.