Skip to main content
DMV Test Free
ENES

Practice test 3 of 10

Delaware CDL — Air Brakes Practice Test 3

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.Step 2 of the inspection adds one air brake item when the compressor runs off a belt. What do you look at?
  2. 2.In a dual air brake system, which of these does each of the two systems have for itself?
  3. 3.Your brakes are well out of adjustment. According to the manual, which brakes will not work right?
  4. 4.When do automatic slack adjusters adjust themselves?
  5. 5.On s-cam brakes, what pulls the brake shoes clear of the drum once you take your foot off the pedal?
  6. 6.Which vehicles does the manual say must have both emergency brakes and parking brakes?
  7. 7.Your truck has rolled to a smooth, routine stop at a red light. What does the manual's normal-stop procedure have you do next?
  8. 8.You want to know whether your truck was built late enough that ABS was required. Where does the manual tell you to find its date of manufacture?
  9. 9.A converter dolly was built after March 1, 1998. What does the manual say it is required to have?
  10. 10.Two of your brakes are out of adjustment as you work down a long grade. What does the manual say happens to the others?

0 of 25 answered