California CDL Air Brakes Test

During the air brake pre-trip inspection, how do you test the low air pressure warning device?

Start the engine and watch the gauge Build air pressure to governor cut-out, shut off the engine, turn the key to the on position, and fan the brakes until the warning activates Apply the parking brake and listen for the alarm Drain the wet tank only

Correct Answer:

Build air pressure to governor cut-out, shut off the engine, turn the key to the on position, and fan the brakes until the warning activates

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