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Practice test 10 of 10

Minnesota CDL — Air Brakes Practice Test 10

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.In an s-cam brake, what happens when you press the brake pedal?
  2. 2.A visible low-air-pressure warning must come on before tank pressure falls below what level?
  3. 3.When testing the governor, at about what pressures should the compressor start and stop pumping?
  4. 4.In a dual air system with the engine at operating rpm, pressure should build from 85 to 100 psi within how long?
  5. 5.How do you test that the parking brake will hold?
  6. 6.What does an antilock braking system (ABS) do?
  7. 7.On the application pressure gauge, needing steadily more pressure to hold the same speed is a sign of what?
  8. 8.At roughly what tank pressure does the governor let the compressor start pumping air again?
  9. 9.Why shouldn't you set the parking brakes when the brakes are very wet in freezing temperatures?
  10. 10.Where is the ABS malfunction lamp located on a truck tractor or bus?

0 of 25 answered