Michigan CDL Air Brakes Practice Questions - Michigan CDL Air Brakes Knowledge Test Exam

Under Michigan CDL Manual Section 5, what is the role of the one-way (check) valve at the supply tank?

It releases excess pressure It keeps air from flowing back from the storage tanks to the compressor if the compressor or supply line fails It dries the air It activates the parking brake

Correct Answer:

It keeps air from flowing back from the storage tanks to the compressor if the compressor or supply line fails

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