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

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On the Michigan CDL Air Brakes test, you hear a continuous loud hiss after building system pressure. What is most likely happening?

The compressor is overheating There is a large air leak somewhere in the brake system The air dryer is malfunctioning The trailer is full

Correct Answer:

There is a large air leak somewhere in the brake system

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