CDL Commercial Driver's License Knowledge Test

What is the air brake applied pressure test procedure?

Drive and brake repeatedly Build pressure to operating level, turn off engine, apply the brake, and observe pressure drop — it should not exceed 3 PSI in one minute for single vehicles Listen for air leaks only Check the brake fluid level

Correct Answer:

Build pressure to operating level, turn off engine, apply the brake, and observe pressure drop — it should not exceed 3 PSI in one minute for single vehicles

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