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Don’t let an air brake restriction on your Idaho Commercial Driver’s License (CDL) prevent you from pursuing great driving opportunities with companies such as Simplot! Most high-weight vehicles, such as semi-trucks and full-size buses, are equipped with air brakes, and you must know how to operate them to qualify for many commercial driving jobs. Air brakes are an essential safety feature that allows you to slow down while navigating sharp turns and making complete stops in heavily congested traffic. Without an extensive knowledge of air brake systems, you are needlessly placing yourself in potentially harmful situations and limiting your employment prospects. However, the process to remove the air brake restriction doesn’t need to be complicated once you’ve obtained sufficient training.
Our Idaho DMV CDL air brake “endorsement” practice test permits you to take advantage of a superior instruction method that other traditional study resources lack. Removing the air brake restriction requires you to pass a skills test in an air brake-equipped vehicle (including an air brake inspection) and an official air brakes knowledge test. The practice test is expertly designed to help you correctly answer the minimum required 80% of the 25 questions on the official knowledge test to pass. With its interactive capability, the practice test uses 30 questions to assess your proficiency level in real time and direct you to the information you must learn to improve. This approach provides you with a blueprint of your path to success. You will experience an expedited learning process that boosts your confidence and makes it possible to pass the official knowledge test on your first attempt.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
This Idaho DMV CDL air brake “endorsement” practice test will ignite your excitement by easily eliminating your most difficult learning obstacles. Traditional study resources, like a study guide, make this task seem nearly impossible. Study guides make learning more complicated because they train you to memorize the answers to the questions without helping you correct the questions you get wrong. This approach limits you to learning surface knowledge that will not fully prepare you to react in response to changing driving conditions. In comparison, the practice test makes the information you need to better understand air brake systems readily available. If you submit an incorrect answer, the practice test provides a detailed explanation of the correct one. The information provided is taken directly from the most recent Idaho DMV CDL manual (Idaho CDL Handbook 2026) and is up to date as of January 2026. You can depend on this information to be accurate because it is taken from the most authoritative source. Based on the teachings of the practice test, you will confidently apply the information learned to various driving scenarios. The practice test will prepare you for better driving opportunities with an enhanced skill set.
Dollar Mountain is a great place to learn to ski, and you can cash in on the valuable driving skills you learn with the practice tests at https://driving-tests.org/idaho/.
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 ID 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.
