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Practice test 4 of 10

Oregon CDL — Air Brakes Practice Test 4

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.During a normal stop with a manual transmission, you should press the clutch only when:
  2. 2.After you release the brakes during stab braking, the wheels can take how long to begin rolling again?
  3. 3.The surest way to know whether a particular vehicle has ABS is to:
  4. 4.Front brake limiting valves were installed on some vehicles built before which year?
  5. 5.Which statement best describes what antilock brakes contribute on an air brake vehicle?
  6. 6.Which foundation brake design is found most often at each wheel of an air-brake vehicle?
  7. 7.On large buses, low-pressure warning devices commonly signal at about:
  8. 8.To set the parking brakes on a newer air-brake vehicle, you:
  9. 9.Besides the service brakes, all trucks, truck tractors, and buses must be fitted with:
  10. 10.When you press the pedal on an s-cam brake, what does the extended chamber push rod do first?

0 of 25 answered