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Practice test 7 of 10

Delaware CDL — Air Brakes Practice Test 7

The Delaware 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.Where in an air brake system is the safety relief valve installed?
  2. 2.For the air leakage rate test on Delaware's inspection test, you shut off the engine. What do you do with the key next?
  3. 3.On your walk-around, you look over the air hoses that run to the brake chambers. What are you checking for?
  4. 4.You are checking the governor's cut-out pressure during the final air brake check. How should the engine be running?
  5. 5.Only your tractor has ABS. Which part of the rig does the manual tell you to keep an eye on while braking?
  6. 6.How is a manually operated air tank drain valve opened?
  7. 7.On a vehicle with air brakes, what takes the place of the hydraulic brake check in Step 7 of the seven-step inspection?
  8. 8.A pickup cuts across your lane with little warning, and your instinct is to hit the brakes. When does the manual call that a good response?
  9. 9.Your truck has a dual air brake system. How will its supply pressure gauges be arranged?
  10. 10.While you are driving, what keeps the powerful springs in the spring brakes from putting the brakes on?

0 of 25 answered