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Question:
Which of the following is true about a dual air brake system?
1. It uses a single set of brake controls.
2. One system usually operates the front axle and one operates the rear axle.
3. One is called the "primary" system and one is called the "secondary" system.
4. All of the above
Answer: All of the above
Explanation
A dual air brake system is a system designed for safety and used on most heavy-duty vehicles. It uses one set of controls, where the "primary" system typically operates the rear axle regular brakes and a "secondary" system operates the front axle brakes.
This question is in Section 3: Air Brake of our CDL Test Guide. Explore now!
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