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Practice test 4 of 10

Minnesota CDL — Air Brakes Practice Test 4

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.Why is repeatedly pressing and releasing the brake pedal for no reason a problem?
  2. 2.What does the supply pressure gauge tell the driver?
  3. 3.If the air compressor has its own separate oil supply, what should you do before driving?
  4. 4.The total stopping distance for an air brake vehicle is made up of which four parts?
  5. 5.When should you avoid setting the parking brakes and use wheel chocks instead?
  6. 6.What should you always do before leaving your vehicle unattended?
  7. 7.What is the most common brake-related problem found during roadside inspections?
  8. 8.In an s-cam brake, what happens when you press the brake pedal?
  9. 9.How often must you drain air tanks that have manually operated drain valves?
  10. 10.What happens as the brake shoes and linings press against the drum to slow the vehicle?

0 of 25 answered