Q
Before driving a vehicle with a dual air brake system, you must wait for the air compressor to build a minimum of ____ in both the primary and secondary systems.
Air Brakesmedium
A50 psi
B100 psi
C150 psi
Detailed Explanation
The correct answer is "100 psi". This is based on federal CDL regulations and safety standards.
Correct Answer: 100 psi
Ready to practice for real?
Take our free, full-length Air Brakes practice test. Simulates the actual DMV exam with timed questions.
Start Practice TestRelated Questions
66. What factors can cause brakes to fade or fail?
air-brakesmedium
29. The S-cam:
air-brakesmedium
54. The storage tanks are used to hold compressed air.
air-brakesmedium
18. The most common type of foundation brake found on heavy vehicles is the:
air-brakesmedium
6. If the air compressor should develop a leak, what keeps the air in the tanks?
air-brakesmedium