Free Texas CDL Air Brakes Test 2025

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

Passing the Texas DMV CDL Air Brakes Knowledge Test is essential for anyone looking to operate commercial motor vehicles (CMVs). Without passing, your CDL will include the restriction “L,” preventing you from operating CMVs with air brakes. Failing the air brakes test results in a one-day waiting period and a fee before you can retake it. Our Texas DMV CDL Air Brakes Practice Tests are designed to help you pass your knowledge exam on the first attempt.

Air brakes are essential for navigating Texas’s flat plains and rolling hills as well as the steep inclines and winding highways of its deserts and mountains. The winter snow and ice in the northwestern regions make air brakes important for heavy rigs to safely navigate.

Texas is a major transportation hub for the U.S. and Mexico, with such critical highways as I-10 (crossing east-west through flat and mountainous terrain), I-20 (connecting to Georgia and the southeastern U.S.), I-35 (connecting to Mexico and Oklahoma), and I-45 (linking Houston and Dallas). As most semi-trucks and tractor-trailers are equipped with air brakes, restriction “L” would limit your marketability.

The air brake qualification is crucial for employment across the Lone Star State’s leading industries, including oil, technology, agriculture, and logistics. Major companies using air brakes include ExxonMobil, Chevron, and Texas Instruments in the manufacturing sector and Halliburton and Baker Hughes in the energy industry. Pilgrim’s Pride and JBS in the agriculture sector require air brake-qualified drivers as do Greyhound Lines and Texas Trails in the tourism and charter bus services. Even the thousands of Texas full-size school buses use air brakes and have this requirement. The “L” restriction makes operating CMVs equipped with air brakes illegal and these jobs unattainable.

Our CDL Air Brakes Practice Tests cover essential knowledge for the official DMV Air Brakes knowledge test. This test features multiple-choice questions based on the state’s CDL manual (Texas CDL Handbook 2025) and requires a minimum passing score of 80%. The information you learn will also help you pass your skills test, which includes inspecting components, testing for air pressure and leaks, and operating air brake-equipped vehicles.

Our Practice Tests are engineered to offer real-time feedback on all responses and mimic material you will face on the official knowledge test. This approach improves retention and ensures you’re prepared to pass the official test.

9 min to complete

Available in EN and ES

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What to expect on the actual TX DMV exam

questions

correct answers to pass

80%

passing score

Helpful links

TX DMV website

Official Texas CDL manual (2025)

More TX DMV Written Exam Resources

TX CDL Air Brakes Test (you are here)

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Our commitment to accuracy and quality in our practice tests

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.
Rigorous Review Process:
Once Steven has finalized a set of questions, our team conducts a joint review session. This second level of scrutiny involves content accuracy, proofreading, and fact-checking to eliminate any errors.
User Feedback Mechanism:
After a question goes live on our site, we keep the lines of communication open. Each question features a feedback button, inviting users to report any issues or errors. This continuous feedback loop allows us to address and rectify any concerns promptly.
Responsive Updates:
In line with our commitment to accuracy, we quickly update our practice questions to reflect any changes in the DMV manuals. Additionally, we update the free electronic copy of the state's driver's license manuals on our site, typically within a few days after the DMV publishes them.

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 Texas CDL Air Brakes Test

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