Question 1 of 20
Score: 0/0For a combination vehicle with the engine off and brakes applied, what is the maximum allowed air leakage rate?
ExplanationWhen the brakes are on and the engine is off, the air leakage rate in a combination vehicle should not exceed 4 PSI per minute. Anything higher indicates a potential problem with the air brake system.
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Did you know? Coupling has a required order — chock, position, connect, check. The test grades the sequence.
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