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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1. Oil and water usually collect in compressed air tanks. If you do not have an automatic tank drain, when should you drain the air tanks?
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10. The safety valve is set to automatically reduce pressure at:
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100. Your bus or truck has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?
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101. It is not safe to drive a vehicle that has brake drums (or discs) with cracks or that are thinner than the manufacturer's specifications, generally this will be — an inch.
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102. Emergency controlled braking is when you:
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