What must be done with the engine when refueling a bus?

a.Turn it off completely

b.Keep it idling for quick departure

c.Rev it slightly to keep the battery charged

d.It does not matter as long as passengers are off

Explanation

The engine must be turned off during refueling. Running the engine during refueling creates a fire and explosion risk from fuel vapors.

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About the CDL Exam

The CDL (Commercial Driver License) exam tests your knowledge of commercial driving rules, safety procedures, and vehicle operation. You must score 80% or higher to pass the written knowledge test. The exam covers general knowledge, air brakes, combination vehicles, and various endorsements.

This question is from the Passenger Endorsement Test #1 section. Practice with more questions from this category to build confidence before taking the official DMV test.

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