When operating a vehicle with a dual air brake system the driver should
A. Let the vehicle warm up before driving to ensure that the fuel reaches the engine.
B. Let the air compressor build up a minimum of 100 psi pressure in the primary and secondary systems before driving.
C. Begin driving just after the vehicle starts.
Answer: B. Let the air compressor build up a minimum of 100 psi pressure in the primary and secondary systems before driving.
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