Q
90. If your bus or truck has dual parking control valves, you can use pressure from a separate tank to:
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ABalance the service brake system when you are parked.
BStay parked twice as long without using up service air pressure.
CRelease the spring emergency/parking brakes to move a short distance.
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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