Heavy Equipment Operator Certification Exam Prep · Question
When refuelling heavy equipment, what is the most important safety precaution to take regarding the engine?
The engine must be turned off and allowed to cool down, and the ignition disabled, to prevent ignition of flammable vapours during refuelling operations.
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Question: When refuelling heavy equipment, what is the most important safety precaution to take regarding the engine?
Answer options:
- Keep the engine running to prevent cold starts ✅ Ensure the engine is off and cooled down, and the ignition is disabled
- Have a second person hold the fuel nozzle steady
- Refuel only when the fuel tank is completely empty
Correct answer: Ensure the engine is off and cooled down, and the ignition is disabled
Explanation: The engine must be turned off and allowed to cool down, and the ignition disabled, to prevent ignition of flammable vapours during refuelling operations.
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