Minnesota Air Brakes Practice Test 2
40 questions covering air brakes content, drawn from the FMCSA-aligned CDL question pool and the Minnesota Commercial Driver's License Manual.
What this test covers
Passing removes the air brake restriction rather than adding an endorsement. The pass mark is the federal 80%, and most states do not publish a question count for it. Questions cover the components of an air brake system (compressor, governor, reservoirs, brake chambers, slack adjusters), how to inspect air brakes, the proper procedure for testing low-pressure warning devices, the brake lag distance unique to air brakes, and emergency and parking brake systems. You will also be tested on the air brake inspection portion of the CDL pre-trip test.
Sample Air Brakes questions
Preview of what is on Practice Test 2. Get it with Pro to take the full 40-question test.
How can you identify a trailer that is equipped with ABS?
What is meant by 'brake lag' in an air brake system?
Approximately how long is the brake lag time when you make a hard brake application on an air brake vehicle?