Illinois CDL Practice Test: Air Brakes - Test 2023
Based on 2023 IL CDL Handbook
Instruction: To obtain this endorsement required to drive a vehicle with air brakes, applicants must pass a 20-question test. And to pass the test, applicants must score at least 80%. Test questions are from the IL CDL Handbook. The Air Brakes endorsement can be used with the Class A, B, or C CDL. If you need additional information, please contact your local DMV office. You can find your nearest DMV office at Illinois DMV locations.
2. Having ABS on only one axle:
Can be dangerous.
Slows the vehicle, but cannot stop it.
Still allows you additional control when braking.