Air Brakes CDL Practice Test
20 real exam-style questions. Answer choices reshuffle every attempt — most states require 80% to pass.
Quick Answer
Removes the air-brake restriction. Covers the air brake system, dual systems, warnings, spring brakes, and the inspection & leakage tests. Every question below is grounded in the official CDL manual and FMCSA rules, with the correct answer and an explanation shown the moment you answer.
Loading questions…
More CDL practice tests
Got your CDL — or close?
Find an FMCSA-registered school in our truck driving schools directory, and when you go owner-operator, O Trucking dispatches you for a flat weekly rate — no per-load commission.
How dispatch works