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Practice test 9 of 10

Wisconsin CDL — Air Brakes Practice Test 9

The Wisconsin 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.When you road-test the service brakes at about 5 mph, what should you be watching for?
  2. 2.When should you avoid setting the parking brakes and use wheel chocks instead?
  3. 3.What is the main function of an antilock braking system (ABS)?
  4. 4.An automatic front wheel limiting valve sends full air to the front brakes under what condition?
  5. 5.Before driving a vehicle with dual air brakes, you should wait until pressure reaches at least what level in both systems?
  6. 6.Which sequence describes the stab braking method?
  7. 7.For a combination vehicle, what is the most air pressure that may be lost in one minute during the leakage test?
  8. 8.What causes brake fade?
  9. 9.What is a dual air brake system?
  10. 10.What does a supply pressure gauge tell the driver?

0 of 25 answered