Vermont CDL — Air Brakes Practice Test

The Vermont CDL — Air Brakes knowledge test has ~25 questions; you need ~20 correct (80%) to pass.

Or take one of 10 full-length practice tests

25 questions · pass with 20 correct. You get instant feedback and an explanation after every answer.

Choose your level

The full-length test, with feedback and an explanation after every answer.

Vermont CDL — Air Brakes practice tests

10 full-length practice tests, each with 25 questions and a pass mark of 20, like the real test. You see the answers and explanations after you grade.

Test 1
25 questions · pass with 20
Which statement about wedge brakes does NOT match the manual?
Test 2
25 questions · pass with 20
Which of these is NOT something Section 11 tells you to confirm about a brake chamber?
Test 3
25 questions · pass with 20
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?
Test 4
25 questions · pass with 20
You move from one air-braked truck to another and notice a different number of air tanks. What does the manual say about that?
Test 5
25 questions · pass with 20
To have an air brake restriction removed in Vermont, a driver must get a commercial learner permit and hold it for at least 14 days. What payments does the manual say go with that?
Test 6
25 questions · pass with 20
Figure 1.2 in the Vermont manual charts which sections to study for each license class and marks Section 5 with an asterisk. What does the footnote say?
Test 7
25 questions · pass with 20
How does the manual describe the effect of ABS on a vehicle's normal braking capability?
Test 8
25 questions · pass with 20
Figure 1.2 in the Vermont manual charts which sections to study for each license class and marks Section 5 with an asterisk. What does the footnote say?
Test 9
25 questions · pass with 20
Which sequence matches the manual's stab braking method?
Test 10
25 questions · pass with 20
In an s-cam brake, air pressure pushes the rod out of the brake chamber and moves the slack adjuster. What does the slack adjuster's movement twist?