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All Candidates for the Class B CDL license must complete the following requirements: 1  You must pass a General Knowledge exam. 2  You must pass the Air Brakes test. 3  You must pass the Pre-trip inspection.
I think in all states you do need a CDL with an Air Brake Endorsement to drive a truck with air brakes. It would probably mean that you would have to have a Class B also. I don't think there is any trucks made with air brakes that have a light enough gross rating that they wouldn't require a Class B to drive.