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Practice test 3 of 10

Vermont CDL — Air Brakes Practice Test 3

The Vermont 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.Section 11 limits hand-pulled pushrod travel on manual slack adjustors to one inch. In what condition must the brakes be when you make that check?
  2. 2.How hard do you apply the brakes when you use the controlled braking method in an emergency stop?
  3. 3.On a long downgrade you are using the manual's brake-and-release technique in the proper low gear. How long do you keep repeating it?
  4. 4.The manual says not to wait for the spring brakes to come on by themselves after a low air warning. What reason does it give for stopping as soon as the light and buzzer start?
  5. 5.At the end of the day you crack open each manual drain valve for a second and close it again. How does that square with the manual?
  6. 6.A Vermont commercial license carries an air brake restriction, code L, because the skills test was taken in a vehicle without air brakes. What does that restriction mean day to day?
  7. 7.Which of these is NOT something Section 11 tells you to confirm about a brake chamber?
  8. 8.Vermont's table of vehicle groups and their CDL tests lists the Air Brakes knowledge test with the note 'if equipped.' For which license classes does that entry appear?
  9. 9.A new driver thinks the air compressor governor sets how hard the brakes apply. What does the manual say the governor actually controls?
  10. 10.The manual explains how too much heat produces brake fade. Which of these is NOT part of that explanation?

0 of 25 answered