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

For Michigan CDL air-brake testing, you should NOT use the parking brake if:

You are parked on level ground The brakes are very hot (such as just after going down a long mountain grade) or wet in freezing weather where they could freeze You are parked overnight The vehicle is empty

Correct Answer:

The brakes are very hot (such as just after going down a long mountain grade) or wet in freezing weather where they could freeze

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