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Practice test 4 of 10

Utah CDL — Air Brakes Practice Test 4

The Utah 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.You have driven through deep standing water and your brakes are soaked. What is the recommended way to dry them?
  2. 2.After you release the brakes during stab braking, how long can it take for the wheels to start rolling again?
  3. 3.How do you check that the parking brake will actually hold?
  4. 4.The safety relief valve on the first air tank starts letting air escape. What does that tell you?
  5. 5.What is the defect most often found during roadside inspections?
  6. 6.During the final air-brake check, at about what pressures should the governor cut the compressor in and out?
  7. 7.In a dual air system, what happens if one of the two systems loses most of its pressure?
  8. 8.What color is the malfunction lamp that warns of an ABS problem?
  9. 9.Why must emergency and parking brakes be held on by mechanical force?
  10. 10.On an older air-brake truck, what might the parking brake control look like?

0 of 25 answered