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Practice test 6 of 10

Ohio CDL — Air Brakes Practice Test 6

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.Before checking the slack adjusters by hand, what should you do first?
  2. 2.Air-brake truck tractors built on or after which date are required to have antilock brakes?
  3. 3.How do spring brakes actually hold a parked truck in place?
  4. 4.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?
  5. 5.Which statement about ABS and stopping distance is accurate?
  6. 6.On large buses, at roughly what pressure is it common for the low-air warning to activate?
  7. 7.What must you always do before leaving your vehicle unattended?
  8. 8.On a trailer equipped with ABS, where is the yellow malfunction lamp located?
  9. 9.If air keeps leaking away, spring brakes on a tractor or straight truck will come fully on once pressure drops into what range?
  10. 10.How do you set the parking brakes with the diamond-shaped control knob?

0 of 25 answered