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Practice test 9 of 10

Oregon CDL — Air Brakes Practice Test 9

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.If one half of a dual air brake system loses most of its pressure, you should expect that:
  2. 2.When you pull hard on a manual slack adjuster, roughly how much movement suggests it needs adjustment?
  3. 3.The single most frequently found brake defect during roadside inspections is:
  4. 4.If the air compressor quits while you are on the road, what are the air storage tanks sized to give you?
  5. 5.On large buses, low-pressure warning devices commonly signal at about:
  6. 6.Besides the service brakes, all trucks, truck tractors, and buses must be fitted with:
  7. 7.Using the recommended downgrade braking pattern, roughly how long should each brake application last?
  8. 8.For an average driver at 55 mph in good conditions, the total stopping distance with air brakes is about:
  9. 9.When should you NOT rely on the parking brakes to hold the vehicle?
  10. 10.Before driving a vehicle with a dual air brake system, you should let the compressor build a minimum of:

0 of 25 answered