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Practice test 10 of 10

Ohio CDL — Air Brakes Practice Test 10

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.What is the main benefit that antilock brakes (ABS) provide?
  2. 2.Which statement about ABS and stopping distance is accurate?
  3. 3.When you test the low-pressure warning signal, it must come on before tank pressure falls below what level?
  4. 4.What most commonly causes brakes to fade on a long downgrade?
  5. 5.When you pull hard on an s-cam slack adjuster, about how much free movement suggests it needs adjustment?
  6. 6.If a truck is fitted with an alcohol evaporator, does that eliminate the need to drain the tanks?
  7. 7.If you find you must keep raising application pressure just to hold the same speed, what does that tell you?
  8. 8.Air-brake truck tractors built on or after which date are required to have antilock brakes?
  9. 9.For other air-brake vehicles such as trucks, buses, trailers, and converter dollies, ABS is required on those built on or after what date?
  10. 10.Before you drive a rig equipped with a dual air brake system, how much pressure should the compressor build in both the primary and secondary systems?

0 of 25 answered