Class B - Test | US DMV Test.com

6 How should the air leakage rate be tested?

Turning off the engine, holding the parking brake and timing the air pressure drop.

Turning off the engine, releasing the parking brake and timing the air pressure drop

Leaving the engine on, pumping the brake pedal and checking the air pressure drop.

Pumping the brake pedal when the air pressure has dropped below 60 psi.

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