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Practice test 9 of 10

Hawaii CDL — Air Brakes Practice Test 9

The Hawaii 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.Your truck's air tanks have automatic drains. What does the manual say about draining those tanks by hand?
  2. 2.Why does the manual tell you to check brake adjustment often?
  3. 3.You are slowing with the brake pedal and need more braking. What happens when you push the pedal down harder?
  4. 4.On Hawaii's vehicle inspection test, the parking brake check is done with the air system in what state?
  5. 5.In a typical dual air brake system, what name is given to the system that runs the service brakes at the rear axle or axles?
  6. 6.To test the low pressure warning signal, you shut the engine off with enough air that the warning is not showing. What must you switch on before pumping the pressure down?
  7. 7.During the final air brake check, the governor does not cut the compressor in and out the way it should. Why does the manual treat that as a safety problem?
  8. 8.Brake lag is a delay that comes with air brakes. On which vehicles does the manual say hydraulic brakes, which work instantly, are used?
  9. 9.On the vehicle inspection test you check a belt-driven air compressor's belt for snugness. How much play at the center of the belt does the manual allow?
  10. 10.Which pairing of an air brake part with its job matches the manual?

0 of 25 answered