MS CDL Air Brakes Practice Test 4 2025

If you plan to operate air brake-equipped commercial motor vehicles (CMVs), you’ll need to have the “L” restriction removed from your CDL. This restriction prohibits you from driving any vehicles equipped with air brakes. Until this restriction is removed, you’ll be cut off from an enormous number of job opportunities. To remove the restriction, you must pass the Mississippi DMV CDL Air Brakes Knowledge Test and the Skills Test in an air brake-equipped vehicle. The knowledge test covers a substantial and seemingly overwhelming amount of material. To help you pass the test on your first attempt, our experts have crafted a series of Air Brakes Practice Tests with many features to ease the burden of this task.

Our Free Mississippi CDL Air Brakes Practice Tests mirror the official exam and are based on the latest CDL Manual. The official Air Brakes Knowledge Test consists of 25 multiple-choice questions, and you’ll need a minimum score of 80% (16 correct answers) to pass. If you do not pass, state policy requires you to pay an additional fee and wait at least one business day before retesting.

Our practice tests, unlike other resources you may come across, offer real-time AI-driven feedback, hints when needed, and a design focused on the actual material tested, not filled with unnecessary fluff you don’t need to know. We have provided everything we could to ensure you pass the official exam, including a revolutionary Challenge Bank of questions that remembers your incorrect responses. It then presents those questions again until you’ve achieved mastery of the material. Check out our other Air Brakes Practice Tests here: https://driving-tests.org/mississippi/ms-cdl-air-brake-practice-test/.

We believe you must earn the air brake qualification because most CMVs are equipped with air brakes. You’ll be severely limiting yourself with an “L” code on your CDL. High-demand careers in logistics, agriculture, energy, construction, and manufacturing are the tip of the iceberg in Mississippi. Whether you’re hauling poultry products from Sanderson Farms, liquid cargo for Ergon, Inc., or consumer goods along I-20, I-55, or I-10, companies rely on drivers with the air brake qualification and often pay a premium to get them!

Many combination vehicles rely on air brakes, so by seeking this qualification now, you are well on your way to earning a Class A License. Try out our CDL Combination Vehicles Practice Tests to help you pass the official knowledge exam (one of the Class A license requirements): https://driving-tests.org/mississippi/ms-cdl-combination-test/. Also, for even more earning potential, consider endorsements for Tankers (N), Hazardous Materials (H), or Doubles/Triples (T). We offer dedicated practice tests for these as well: https://driving-tests.org/mississippi/ms-cdl-hazmat-practice-test/.