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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.

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