Free Kentucky CDL Air Brakes Test 2025

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
Based on 2025 KY commercial driver's license manual
Triple-checked for accuracy
Updated for March 2025

A CDL without an air brake restriction is essential for maximizing your job prospects since most semi-trucks and tractor-trailers rely on air brakes. Failing to pass the Kentucky KSP CDL Air Brakes Knowledge Test results in an “L” restriction, preventing you from operating vehicles equipped with air brakes. Failing the test also results in a one-day waiting period and a retest fee. Our Kentucky KSP CDL Air Brakes Practice Tests are designed to help you pass your knowledge exam on the first attempt.

From Kentucky’s western Flatlands to the steep inclines of the eastern Appalachian region, large CMVs require reliable air brakes to navigate safely. Additionally, the humid climate and wet roads necessitate precise braking systems and drivers who are authorized to operate them. Key freight transportation routes include I-75 (north-south transport), I-64 (linking Louisville and Lexington), I-65 (linking Louisville to Nashville), and the parkways (connecting rural areas to urban parts of the state). The “L” restriction severely limits your driving options on these highways and the many jobs they provide.

Industries across the Bluegrass State that rely on drivers with the air brake qualification include automotive manufacturing, logistics, and agriculture. Major companies requiring the air brakes qualification include UPS Worldport, FedEx Freight, and J.B. Hunt in logistics as well as Ford (Louisville) and Toyota (Georgetown) in manufacturing. Lexington Bluegrass Tours and Miller Transportation are two charter bus companies in the state that require air brakes-qualified drivers. So do school districts operating thousands of full-size school buses. The “L” restriction makes operating CMVs equipped with air brakes illegal, eliminating the above-listed employment options.

The written Air Brakes knowledge test features multiple-choice questions based on the state’s CDL manual (Kentucky CDL Handbook 2025) and requires a minimum score of 80% to pass. Our CDL Air Brakes Practice Tests cover all essential knowledge for the official KSP Air Brakes knowledge test. The information you learn will also be useful as you practice inspecting and operating CMVs to pass your skills test, which includes inspecting components, testing for air pressure and leaks, and operating air brake-equipped vehicles.

Our Practice Tests are designed to resemble what you will face on the official test and offer real-time feedback on all responses. This scientifically proven approach improves material retention and ensures you’re prepared to pass the test.

9 min to complete

Available in EN and ES

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What to expect on the actual KY KSP exam

questions

correct answers to pass

80%

passing score

Helpful links

KY DMV website

Official Kentucky CDL manual (2025)

More KY KSP Written Exam Resources

KY CDL Air Brakes Test (you are here)

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Explore our rigorous, multi-tiered verification process that ensures each question mirrors the official manual for unparalleled accuracy.

Written by Andrei Zakhareuski Updated over a week ago

At Driving-Tests.org, we understand the importance of reliable and accurate practice tests to help you prepare for your DMV exam. That's why we've developed a meticulous process to create and continually update our practice questions, ensuring they reflect the most current driving laws and regulations.

Here's an inside look at how we maintain the highest quality in our practice tests.

Content Creation and Verification Process

Alignment with Official Manuals:
Every question we develop is based on the most recent version of each state's official driving manual. Our team regularly monitors each state DMV's website for the latest updates to ensure our practice tests are always aligned with the most current information.
Community Feedback Integration:
We leverage feedback from our vast community of users to understand which topics are most frequently tested. This helps us focus on the areas that are most relevant and beneficial for your preparation.
Expert Content Creation:
Our in-house editor, Steven, who has extensive experience in driver education, crafts each question with precision. He conducts a thorough review of each question against the official manuals to ensure accuracy.
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Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your DMV exam.

FREE Kentucky CDL Air Brakes Test

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