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Practice test 5 of 10

Oklahoma CDL — Air Brakes Practice Test 5

The Oklahoma 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.During the engine compartment step of the inspection, what extra air brake item should you check on a belt-driven compressor?
  2. 2.How does the air brake system turn on the brake lights for traffic behind you?
  3. 3.At about what tank pressure does the governor reach its cut-out point and stop the compressor from pumping?
  4. 4.The total stopping distance for an air brake vehicle is made up of which four parts?
  5. 5.How is the 'controlled braking' method performed during an emergency stop?
  6. 6.What color are the ABS malfunction lamps that warn of a fault?
  7. 7.On newer air brake vehicles, how do you apply the parking brakes?
  8. 8.What advantage do the air storage tanks give you if the compressor quits pumping?
  9. 9.When should you avoid setting the parking brakes?
  10. 10.On large buses, at what pressure do the low pressure warning devices commonly activate?

0 of 25 answered