Practice question

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

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

The correct answer is shown above. Try the full quiz for additional practice.