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

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Under Michigan CDL Manual Section 5, what is the typical pressure range at which the tractor protection valve closes during a major loss of air?

Between 20 and 45 psi Between 100 and 125 psi Below 5 psi Above 150 psi

Correct Answer:

Between 20 and 45 psi

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