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Practice test 2 of 10

Louisiana CDL — Air Brakes Practice Test 2

The Louisiana 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.If the air compressor has its own supply of oil, what should you do before driving?
  2. 2.How does the emergency brake system stop a vehicle when the brakes fail?
  3. 3.What does 'controlled braking' mean during an emergency stop?
  4. 4.What is 'brake lag' in an air brake system?
  5. 5.With manually operated tank drain valves, how often must you drain the tanks?
  6. 6.What does it mean if the safety valve lets air escape?
  7. 7.On vehicles with dual parking control valves and a separate air tank to release the spring brakes, why must you plan your moves carefully?
  8. 8.When should you NOT use the parking brakes?
  9. 9.What must you always do before leaving your vehicle unattended?
  10. 10.Before driving a vehicle with a dual air system, the compressor should build a minimum of what pressure in both systems?

0 of 25 answered