Free CDL Quiz

CDL Air Brakes Test #2 | New Mexico 2026 #2 - Page 4

New Mexico CDL Practice Examination (Based on the 2026 NM CDL handbook)

25
Questions
20
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22. What is the slack adjuster used for in an S-cam brake?

23. What happens to braking ability if the slack adjusters are out of adjustment?

24. How should you test that the low air pressure warning works during a pre-trip inspection?

25. Automatic drain valves on air tanks:

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