When about to drive a vehicle with a dual brake system, a driver should:

Question

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.

Accepted Answer

Wait for air pressure to build in both the primary and secondary systems.

Answer

Let the vehicle warm up to ensure the fuel reaches the engine.

Answer

Begin driving just after the engine starts.

Answer

Pump the pedal about 20 times to build pressure, then begin driving.