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Practice test 9 of 10

Michigan CDL — Air Brakes Practice Test 9

The Michigan 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.On newer air brake vehicles, what does the parking brake control usually look like?
  2. 2.What does the supply pressure gauge on an air brake vehicle tell the driver?
  3. 3.When checking a slack adjuster on an s-cam brake, about how much movement at the push-rod point suggests it needs adjustment?
  4. 4.Why can a heavily loaded vehicle take a long distance to stop once the spring brakes apply on their own?
  5. 5.Why do most heavy-duty vehicles use a dual air brake system?
  6. 6.On a typical air brake vehicle, the low air pressure warning you can see must switch on before tank pressure drops below what level?
  7. 7.When should you skip setting the parking brakes and use wheel chocks instead?
  8. 8.With the foot brake fully applied and held for one minute, a combination vehicle's air pressure should not fall by more than how much?
  9. 9.According to the manual, what is the defect turned up most often during roadside inspections?
  10. 10.On a trailer equipped with ABS, where is the yellow malfunction lamp located?

0 of 25 answered