Before driving a vehicle with a dual air brake system, you must let the pressure build up to at least ___ psi in both the primary and secondary systems.

100. Section 5.2: Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum of 100 psi

Before driving a vehicle with a dual air brake system, you must let the pressure build up to at least ___ psi in both the primary and secondary systems.

ANSWER BREAKDOWN
  • A. Incorrect. "60" is not correct. Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems.
  • B. Incorrect. "80" is not correct. Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems.
  • C. Correct. Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems.
  • D. Incorrect. "120" is not correct. Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems.