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Minnesota CDL — Air Brakes Practice Test 1

The Minnesota 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 brakes have gotten soaked driving through deep water. What does the manual tell you to do about it?
  2. 2.What most commonly causes air brakes to fade?
  3. 3.What is the most common brake-related problem found during roadside inspections?
  4. 4.The total stopping distance for an air brake vehicle is made up of which four parts?
  5. 5.What is a dual air brake system?
  6. 6.On newer air brake vehicles, what does the parking brake control usually look like?
  7. 7.What happens to the spring brakes if a leak lets all the air escape from the system?
  8. 8.In a dual air brake system, what are the two systems called?
  9. 9.How are the spring brakes kept released while you drive normally?
  10. 10.Air brakes on a large commercial vehicle are actually made up of which three separate braking systems?

0 of 25 answered