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Practice test 9 of 10

Tennessee CDL — Air Brakes Practice Test 9

The Tennessee 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 should you NOT use the parking brakes to hold the vehicle?
  2. 2.At what pressure is the safety relief valve usually set to open?
  3. 3.In an s-cam brake, what happens when you press the brake pedal?
  4. 4.What is a dual air brake system?
  5. 5.When checking manual slack adjusters on s-cam brakes, how much movement suggests they need adjustment?
  6. 6.In a dual air system, how quickly should pressure build from 85 to 100 psi when the engine is at operating rpm?
  7. 7.The brake pedal in an air brake vehicle is also known by which other names?
  8. 8.Which type of foundation brake is the most common on air brake vehicles?
  9. 9.When making a normal stop with a manual transmission, when should you push in the clutch?
  10. 10.Why can the brakes still be applied several times even after the air compressor quits working?

0 of 25 answered