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Practice test 4 of 10

Arkansas CDL — Air Brakes Practice Test 4

The Arkansas CDL — Air Brakes knowledge test has ~25 questions; you need ~20 correct (80%) to pass.

This practice test follows that format: 25 questions, pass with 20 correct. Answer every page, then grade it to see the answers and explanations.

Questions 1–10 of 25

  1. 1.In a typical dual air brake system, which brakes does the secondary system run?
  2. 2.You start a newer truck, and the ABS malfunction lamp lights for a moment and then goes out. What does that mean?
  3. 3.A truck with a dual air brake system is pulling an air-braked trailer. Which system feeds air to the trailer?
  4. 4.Your truck has automatic slack adjusters. Do you still need to check them during your inspection?
  5. 5.What drives the air compressor on an air-braked truck?
  6. 6.During the final air brake check, your governor fails to cut the compressor in and out as it should. Why does that matter?
  7. 7.You keep driving after the low air warning comes on, and tank pressure keeps dropping. On a typical tractor or straight truck, around what pressure will the spring brakes come fully on?
  8. 8.You are in the proper low gear on a long downgrade and using the brakes to trim your speed. About how long should each brake application last?
  9. 9.Outside of an emergency, when should automatic slack adjusters normally need to be adjusted by hand?
  10. 10.During the walk-around, which brake lining condition is acceptable?

0 of 25 answered