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When about to drive a vehicle with a dual brake system, a driver should:
A.  Let the vehicle warm up to ensure the fuel reaches the engine.
B.  Wait for air pressure to build in both the primary and secondary systems.
C.  Begin driving just after the engine starts.
D.  Pump the pedal about 20 times to build pressure, then begin driving.
Before driving a vehicle with a dual air brake system, allow time for the compressor to build up pressure to at least 100 psi in both systems.
Answer Statistics
6.71 % of our users get this question wrong.
This question's difficulty is Medium

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