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Practice test 5 of 10

Oregon CDL — Air Brakes Practice Test 5

The Oregon 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.Why can a heavily loaded vehicle take a long distance to stop once the spring brakes apply on their own?
  2. 2.If the air compressor quits while you are on the road, what are the air storage tanks sized to give you?
  3. 3.What does the stop light switch do on an air brake system?
  4. 4.What physically causes brake fade when the brakes overheat?
  5. 5.Which foundation brake design is found most often at each wheel of an air-brake vehicle?
  6. 6.What is the main job of the air compressor?
  7. 7.After you release the brakes during stab braking, the wheels can take how long to begin rolling again?
  8. 8.Why should you avoid stepping on the brake pedal while the spring brakes are already applied?
  9. 9.During the final brake check, the governor should stop the compressor from pumping at about:
  10. 10.Compared with the near-instant action of hydraulic brakes, air brakes need roughly how long for pressure to reach the brakes?

0 of 25 answered