Question:
What should you do in order to test the static air leakage rate?
A
Turn off the engine, release the parking brake, and let the system settle.
explanation
Observe how rapidly the air pressure drops by turning off the engine and releasing the parking brake (by pushing the parking brake control knob in). The air pressure should drop by no more than 2 psi for a single car and no more than 3 psi for a combination vehicle in a minute.
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