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Practice test 7 of 10

Ohio CDL — Air Brakes Practice Test 7

The Ohio 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.When you pull hard on an s-cam slack adjuster, about how much free movement suggests it needs adjustment?
  2. 2.With the engine off and the parking brake released on a single vehicle, the air pressure drop should be less than how much in one minute?
  3. 3.In which situation should you NOT set the parking brakes, using wheel chocks instead?
  4. 4.On an s-cam brake, what happens when you press the brake pedal?
  5. 5.If you find you must keep raising application pressure just to hold the same speed, what does that tell you?
  6. 6.What color is the malfunction lamp that warns of an ABS fault?
  7. 7.How do spring brakes actually hold a parked truck in place?
  8. 8.In the same engine-off leakage test, but on a combination vehicle, what is the acceptable maximum pressure drop in one minute?
  9. 9.While you are driving, the low-air-pressure warning suddenly lights up. What should you do?
  10. 10.During the walk-around, brake linings should be checked to make sure they are not:

0 of 25 answered