CDL Practice Question #160
Category: Air Brakes
You are driving a tractor-trailer with the air-pressure gauge dropping rapidly. You should:
Correct. A rapid drop in air pressure indicates a serious leak. Pull over before the pressure drops to the point where the spring brakes apply and the vehicle stops on the road.
Why this question matters
This question is one of 71 in our Air Brakes bank. The reasoning above comes directly from the AAMVA CDL Manual, the source document used by every U.S. state DMV. Memorizing the underlying rule — not just the letter answer — is what separates passing on the first attempt from a return trip and another fee.
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