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Practice test 5 of 10

Arkansas CDL — Air Brakes Practice Test 5

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.Since what year have all vehicles been built with automatic slack adjusters?
  2. 2.Some automatic air tank drains come fitted with electric heating devices. What are the heaters for?
  3. 3.Your brakes are wet after a long run through heavy spray. How does the manual suggest drying them?
  4. 4.On the CDL vehicle inspection test, what is the air brake check designed to confirm?
  5. 5.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?
  6. 6.Which vehicles does the manual say must have emergency brakes and parking brakes held on by mechanical force?
  7. 7.A converter dolly was manufactured in 1999. What does the manual say about its ABS malfunction lamp?
  8. 8.You want to pull a trailer that has air brakes. Besides the Air Brakes section, which section of the manual must you also study?
  9. 9.Which statement about the application pressure gauge is true?
  10. 10.In a wedge brake, what does the brake chamber push rod do?

0 of 25 answered