ND CDL Air Brakes Practice Test 2 2025

An “L” restriction on your North Dakota Commercial Driver’s License (CDL) prohibits you from operating vehicles equipped with air brakes. Your success as a commercial driver is greatly affected by having an “L” restriction on your CDL. Potential employers, such as F & M Transport and Bis-Man Transit, are more likely to pass on hiring drivers who are not air-brake qualified. Air brakes are a vital safety feature that allows you to regulate your speed. More braking force is required for vehicles transporting heavily weighted loads to slow down or come to a complete stop. Adverse weather, sharp turns, and heavily congested traffic require you to adjust your speed, and a firm grasp of air brake operation will help you safely navigate such rapidly changing driving conditions.

Our North Dakota DOT CDL air brake “endorsement” practice test expedites the learning process. The practice test targets the learning obstacles keeping you from successfully passing a skills test in a vehicle equipped with air brakes (including conducting an inspection of the air brakes) and an official Air Brakes knowledge test. These are the steps to remove your “L” restriction, and you must correctly answer at least 80% of the 25 questions on the official knowledge test to pass.

This North Dakota DOT air brake “endorsement” practice test enhances your knowledge of air brake operations to help you meet the challenges of the official knowledge test. The practice test uses 30 questions, like those on the official knowledge test, to assess your proficiency and direct you to the information you should study more. You can rely on the practice test to help you create a plan that advances your learning.

Using the most authoritative information available, the practice test fills your knowledge gaps to exhibit an extensive knowledge of air brake operations. The practice test is based on the most recent North Dakota DOT CDL manual (North Dakota CDL Handbook 2025) and is up to date as of November 2025. If you get a question wrong, the practice test will use information directly from the CDL manual to explain the correct answer and show you how to apply it to your driving practices.

More traditional study methods take a much different approach to learning, which is one-dimensional and makes learning a complex activity. Traditional study methods train you to memorize the answers to the questions without providing information to correct your misconceptions. The practice test makes this information readily available, boosts your confidence, and increases your chances of passing the official knowledge test on your first attempt.

Less confident drivers may be intimidated by traveling around the Roughrider State, but you’ll have a smooth ride with the driving skills developed with the practice tests at https://driving-tests.org/north-dakota/.