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It's a practice test that's automatically made up of all your missed questions. Once you finish this test, you’ll be able to revisit your Challenge Bank™ to practice and sharpen your skills.
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Driving opportunities to earn capital aren’t limited to Augusta, but the air brake restriction “L” on your Maine Commercial Driver’s License (CDL) limits your employment prospects. Companies such as Hartt Transportation Systems and Bison Transport need air-brake-qualified drivers. Until the “L” restriction is removed, you will not be cleared to operate most semi-trucks, tractor-trailers, and full-size buses. Air brakes play a critical role in safely transporting heavily weighted cargo because they create enough braking force to regulate your speed. Without air brakes, you will not be able to safely navigate sharp turns or come to a complete stop to avoid an accident. Removing the air brake restriction will make you a more attractive candidate to employers. However, you must begin by receiving adequate training.
Our Maine DMV CDL air brake “endorsement” practice test is an engaging study method that helps you develop a clear understanding of these systems. You can have the air brake restriction removed from your CDL by passing an official knowledge test and a skills test (including performing an inspection of the air brakes). The official knowledge test requires you to correctly answer at least 80% of its 25 questions.
M.S., Chief Educational Researcher (ACES member)
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Using 30 multiple-choice questions, the practice test challenges you to exhibit your knowledge of air brake systems. Based on your performance, the practice test assesses your current proficiency level and directs you to study the information needed to increase it.
This Maine DMV CDL air brake “endorsement” practice test provides more comprehensive instruction than traditional study methods. The one-dimensional approach of traditional study methods limits you to learning surface knowledge. You will only learn to memorize the answers to the questions and be deprived of an in-depth understanding of air brake systems. In comparison, the practice test is based on the most recent Maine DMV CDL manual (Maine CDL Handbook 2026) and is up to date as of January 2026. The CDL manual is the most authoritative source and ensures you are receiving the most accurate information to support your answers. If you submit an incorrect answer, the practice test takes information directly from the manual to provide a thorough explanation of the correct one. This approach is more effective for absorbing the information you must know for the official knowledge test. You will experience a rapid expansion of your knowledge base and a boost in your confidence. Additionally, the practice test will show you how to apply this information to various driving scenarios you may see on the official knowledge test. You’ll be fully prepared to pass the official knowledge test on your first attempt.
The Portland Food Festivals provide year-round opportunities to feast on various cuisines, and you can nourish your driving skills using the practice tests at https://driving-tests.org/maine/.
Driver’s Ed is - nobody wants to set foot inside the DMV. 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 2026 ME 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 DMV.
