Q
12. If your truck or bus has dual parking control valves, you can use pressure from a separate tank to:
Air Brakesmedium
ABalance the service brake system when you are parked.
BRelease the spring emergency/parking brakes to move a short distance.
CStay parked twice as long without using up service air pressure.
Detailed Explanation
The correct answer is "Release the spring emergency/parking brakes to move a short distance.". This is based on federal CDL regulations and safety standards.
Correct Answer: Release the spring emergency/parking brakes to move a short distance.
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
26. A slack adjuster's free play needs to be adjusted if it is more than about _______ how many inches when you pull hard on it?
air-brakesmedium
A safety valve is set to open at ____ psi.
air-brakesmedium
Friction inside a brake drum is caused when the brake shoes and linings:
air-brakesmedium
3. The air brake system for a straight truck or bus should not leak at a rate of more than______ psi per minute with the engine off and the brakes released.
air-brakesmedium
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