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Practice test 8 of 10

Ohio CDL — Air Brakes Practice Test 8

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.How does a "wig wag" low-air warning device let the driver know pressure is low?
  2. 2.If a truck is fitted with an alcohol evaporator, does that eliminate the need to drain the tanks?
  3. 3.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?
  4. 4.During the final air-brake check, at roughly what pressures should the compressor cut in and cut out?
  5. 5.How is "stab braking" performed in an emergency stop?
  6. 6.For other air-brake vehicles such as trucks, buses, trailers, and converter dollies, ABS is required on those built on or after what date?
  7. 7.What must you always do before leaving your vehicle unattended?
  8. 8.A visible low-air warning is required on air-brake vehicles. It must come on before tank pressure drops below what level?
  9. 9.Which type of foundation brake is the most common at each wheel?
  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