Q
87. The use of air brakes on a downgrade is only a supplement to the:
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AUse of the spring brakes.
BUse of the front brake limiting valve.
CBraking effect of the engine.
Detailed Explanation
The correct answer is "Braking effect of the engine.". This is based on federal CDL regulations and safety standards.
Correct Answer: Braking effect of the engine.
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79. How do you test the hydraulic brakes for leaks?
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Front wheel braking works:
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53. When the air pressure falls to the minimum pressure allowed in the system, the governor prevents more air from escaping the air tanks.
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