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Practice test 8 of 10

Alabama CDL — Air Brakes Practice Test 8

The Alabama 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 an air-operated disc brake differ from an s-cam brake?
  2. 2.What inspection method should be used to check a vehicle equipped with air brakes?
  3. 3.In the service brake check you creep ahead at roughly five mph and press the pedal firmly. What are you looking for?
  4. 4.When checking a slack adjuster on an s-cam brake by hand, how much movement suggests it probably needs adjustment?
  5. 5.Apart from leaning on the service brakes too much, what else makes brake fade more likely?
  6. 6.If one half of a dual air system loses most of its pressure, what should you expect?
  7. 7.Why should you avoid pressing the brake pedal while the spring brakes are already applied?
  8. 8.An air brake setup is really made up of three separate braking systems. Which set names them correctly?
  9. 9.At about what pressure is the system's safety relief valve usually set to open?
  10. 10.What does the supply pressure gauge tell the driver?

0 of 25 answered