Question

Before driving a vehicle with a dual air system, the driver must allow `____`.

Accepted Answer

the air compressor to build up a minimum of at least 100 PSI in both the primary and secondary systems

Answer

the air compressor to build up a minimum of at least 60 PSI in both the primary and secondary systems

Answer

the air compressor to build up a minimum of at least 100 PSI in the primary system

Answer

nothing (There are no special circumstances for a dual air brake system.)

Question 33 - Air Brakes Test Practice Test for the CDL