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Practice test 5 of 10

California CDL — Air Brakes Practice Test 5

The California 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.How should you use the brake pedal to make a normal stop in a vehicle with air brakes?
  2. 2.Your CDL skills test vehicle has air-over-hydraulic brakes instead of a full air brake system. What restriction will be placed on your CDL?
  3. 3.During your pre-trip inspection you find the air leakage rate is above the allowed maximum. What are you required to do?
  4. 4.If your air tanks have manually operated drain valves, why must you drain them at the end of every driving day?
  5. 5.You are driving a vehicle with a dual air brake system and one of the two systems loses pressure. What should you expect, and what should you do?
  6. 6.When testing air pressure buildup in a vehicle with a dual air system, pressure should build from 85 to 100 psi in how long (with the engine at operating rpm)?
  7. 7.Who needs to study the Air Brakes section and pass the air brakes knowledge test in California?
  8. 8.The low air pressure warning signal on a vehicle with air brakes must come on before air pressure in the tanks falls below what level?
  9. 9.Total stopping distance for a vehicle with air brakes is made up of which four factors?
  10. 10.At about what tank pressure does the governor "cut in" and make the air compressor start pumping again?

0 of 25 answered