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Practice test 2 of 10

Oregon CDL — Air Brakes Practice Test 2

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.In controlled braking during an emergency, how hard do you press the brakes?
  2. 2.What is the main job of the air compressor?
  3. 3.What does the stop light switch do on an air brake system?
  4. 4.Why is there a short delay before air brakes grip after the pedal goes down?
  5. 5.In a dual air system at operating rpm, pressure should climb from 85 to 100 psi within about:
  6. 6.The surest way to know whether a particular vehicle has ABS is to:
  7. 7.Air brakes add which element to total stopping distance that hydraulic brakes do not have?
  8. 8.Before driving a vehicle with a dual air brake system, you should let the compressor build a minimum of:
  9. 9.You notice air escaping from the safety relief valve on the first air tank. What should you conclude?
  10. 10.When using the stab braking method, you release the brakes:

0 of 25 answered