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View All Plans| 90-100 | => | 15% |
| 80-89 | => | 28% |
| 70-79 | => | 13% |
| 60-69 | => | 15% |
| <60% | => | 28% |
The “L” restriction on your Minnesota Commercial Driver’s License (CDL) will put the brakes on increasing your driving opportunities. With an “L” restriction, commercial drivers are prohibited from operating air-brake-equipped vehicles. Most semi-trucks and full-size buses use air brakes to regulate their speed while transporting heavy loads. Sharp turns, adverse weather, and heavily congested traffic require you to slow down or come to a complete stop to avoid accidents. Prospective employers across multiple sectors, such as CHS (agriculture) and 3M (manufacturing), require drivers to be air-brake qualified for many of their driving positions. With adequate training, you can remove your “L” restriction and get more mileage from your CDL.
Chief Educational Researcher, Driving‑Tests.org (ACES member)
Last verified for accuracy on
Our Minnesota DVS CDL air brake “endorsement” practice test offers an innovative study method to teach the information you must know to remove the “L” restriction. You will be required to conduct a physical inspection of the air brake system, drive a vehicle equipped with air brakes, and pass an official Air Brakes knowledge test to remove the air brake restriction. You must correctly answer at least 80% of the 25 questions on the official knowledge test to pass. The practice test uses 30 questions, similar to those on the official knowledge test, to evaluate your current knowledge level and identify the information you should study more to increase it. The practice test is an effective and time-efficient resource that helps you create a study plan to systematically eliminate your misunderstandings and achieve a passing score.
This Minnesota DVS CDL air brake “endorsement” practice test enhances your ability to absorb the information you need to learn to pass the official knowledge test. The practice test is based on the most recent Minnesota DVS CDL manual (Minnesota CDL Handbook 2025) and is up to date as of December 2025. If you submit an incorrect answer, the practice test takes information directly from the CDL manual to give you a thorough explanation of the correct one. You will be presented with the most authoritative information for developing a clear understanding of air brake systems. Using this information, you can understand the logic supporting the answers you provide and have confidence in applying them to various driving scenarios.
In comparison, traditional study methods are one-dimensional and do not provide additional instruction to overcome your learning obstacles. Traditional study methods are designed to train you to memorize the answers to the questions. If you get a question wrong, it is up to you to locate the information needed to correct your answer. This approach can be frustrating, leading you to waste valuable study time and consult potentially unreliable sources for the information you need. The practice test makes the relevant information for correcting your answers immediately available, boosts your confidence, and increases your chances of passing the official knowledge test on your first try..
Duluth boasts of being the “Zenith City of the Unsalted Seas,” but you can become a well-seasoned driver using the practice tests at https://driving-tests.org/minnesota/.
Driver’s Ed is - nobody wants to set foot inside the DVS. That’s why millions of learners trust us for simple, visual, effective prep.
We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.
Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.
Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.
We build our practice questions from the current 2025 MN Driver Handbook and refine them using patterns recent test‑takers report.
Driver handbook • Knowledge‑test/permit overview • Fees & ID requirements • Office/appointment info
We mirror recurring themes (e.g., right‑of‑way traps, sign look‑alikes) and use similar distractors and wording styles.
We don’t collect or publish actual test items and we’re not affiliated with DVS.
