New Mexico CDL — Air Brakes Practice Test

The New Mexico 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.

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

New Mexico 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
Your truck's air compressor is gear-driven, so there is no compressor belt to show the examiner on the vehicle inspection test. What does Section 11 require instead?
Test 2
25 questions · pass with 20
You brake hard on a slick road in a vehicle without ABS, and wheels other than the steering wheels lock up. Which of these is NOT one of the results the manual lists for that?
Test 3
25 questions · pass with 20
A truck tractor and a semitrailer, both with air brakes, were each built in July 1997. Going by the manual's dates, which of them was required to have ABS when it was built?
Test 4
25 questions · pass with 20
Four drivers run the Step 7 air leakage tests with the engine off. Whose result is more than the manual allows?
Test 5
25 questions · pass with 20
Which order matches the way the manual says an air-operated disc brake applies?
Test 6
25 questions · pass with 20
Which order matches the manual's hand check of slack adjusters on s-cam brakes?
Test 7
25 questions · pass with 20
Section 11 limits how far a brake pushrod may move when you pull on it by hand. Which pairing of slack adjuster type and brake condition goes with its one-inch limit?
Test 8
25 questions · pass with 20
You are in the proper low gear on a long downgrade. Which sequence matches the manual's braking technique?
Test 9
25 questions · pass with 20
A truck tractor and a semitrailer, both with air brakes, were each built in July 1997. Going by the manual's dates, which of them was required to have ABS when it was built?
Test 10
25 questions · pass with 20
Several figures in Section 5 carry a reminder to check the manufacturer's specifications. Which of these does the section state as a fixed limit, with no such reminder?