While CDL standards are federal, the actual exam questions may vary slightly from state to state.
Questions in set
45
Per attempt
25
Passing score
20
Explanations
Every question
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What Do You Check During the Engine Compartment Portion of a CDL Inspection?
During the engine compartment portion of a CDL Pre-Trip Inspection, you check oil level, coolant level, power steering fluid, belts, and hoses for leaks — all with the engine off.
This practice test isn’t limited to engine items alone: the 50-question set mixes in brakes, coupling systems, lights, and every other Pre-Trip Inspection category, with 25 questions per attempt and a full explanation for each one.
