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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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| 80-89 | => | 33% |
| 70-79 | => | 67% |
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The best incentive for removing the “L” air brake restriction from your Kentucky Commercial Driver’s License (CDL) is qualifying for more driving opportunities. Without an extensive knowledge of air brake systems, you won’t be able to pursue employment with many companies along the Bourbon Trail that require drivers to be air-brake qualified. Air brakes are critical to providing enough braking force for drivers to regulate their speed while transporting large amounts of weight. Most high-weight vehicles, such as semi-trucks and full-size buses, are equipped with air brakes, allowing drivers to safely navigate sharp turns and heavily congested traffic. Learning to operate air brakes preserves your safety and helps you get the maximum benefits from your CDL, but you must begin with training from a competent source.
Our Kentucky KSP CDL air brake “endorsement” practice test provides a user-friendly format that promotes an encouraging learning process. You must 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 uses 30 multiple-choice questions to evaluate your current knowledge level and identify the information you should better understand. With this interactive capability, the practice test allows you to develop a study plan to correctly answer the minimum required 80% of the 25 questions on the official knowledge test to pass. The practice test is designed to address your specific learning barriers and help you eliminate them. You will experience significant growth in your knowledge of air brake systems and increase your chances of passing the official knowledge test on your first try.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
Using this Kentucky KSP CDL air brake “endorsement” practice test, you will be provided comprehensive instruction on how these systems operate. The practice test is based on the most recent Kentucky KSP CDL manual (Kentucky CDL Handbook 2025) and is up to date as of December 2025. With the practice test, you won’t feel frustrated by getting a question wrong because a detailed explanation of the correct answer will be given to help you gain a better understanding. This interactive design sets the practice test apart from any traditional study method. The practice test makes the information you need to know readily available and shows you how to apply it to various driving situations.
In comparison, traditional study methods are one-dimensional and designed to train you to memorize the answers to the questions. These tactics are outdated and much less effective in absorbing the information you must know to enhance your driving skills. The practice test uses an innovative approach to help create your personal success plan. You can place your full confidence in its teachings because it references the most authoritative source available. The end result is that you will be fully equipped to meet the challenges of the official knowledge test with advanced driving skills.
While Corvettes roll off the assembly line in Bowling Green, you can develop high-performance driving skills with the practice tests at https://driving-tests.org/kentucky/.
Driver’s Ed is - nobody wants to set foot inside the KSP. 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 KY 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 KSP.
