🛞North Carolina Air Brakes — Question 6 of 20
The safety valve is set automatically when pressure is:
North Carolina CDL Air Brakes Test Info
Questions on Exam
25
Passing Score
80%
Time Limit
Typically 30 minutes; varies by testing location
Age Requirements
Intrastate: 18+ · Interstate: 21+
North Carolina Division of Motor Vehicles (NCDMV)
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