Q
57. What is a dual air brake system?
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AA two brake system, one operates the front brakes and one operates the back brakes.
BA two braking system, one for each side of the vehicle.
CA two braking system, one for daytime and one for nighttime driving.
Detailed Explanation
The correct answer is "A two brake system, one operates the front brakes and one operates the back brakes.". This is based on federal CDL regulations and safety standards.
Correct Answer: A two brake system, one operates the front brakes and one operates the back brakes.
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