Free Tennessee CDL Air Brakes Test 2025

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

Passing the Tennessee DMV CDL Air Brakes Knowledge Test is key to avoiding restrictions on your license, waiting periods, and retest fees. Failure to pass the Tennessee DMV CDL Air Brakes Knowledge Test means your CDL will include the restriction “L,” prohibiting you from operating heavy commercial motor vehicles (CMVs) with air brakes. This restriction will significantly impact your marketability in commercial driving. Our Tennessee DMV CDL Air Brakes Practice Tests will prepare you for passing your knowledge exam on the first attempt.

The flat plains, rolling hills, steep inclines, winding roads, and high-altitude areas of the Appalachian Mountains present significant driving hazards in Tennessee. The stop-and-go traffic of its urban areas also demands air brakes for safe operation. The summers bring high heat and heavy thunderstorms, and the winters bring ice and snow, making air brakes essential for maintaining control. Key transportation routes include I-40 (running east-west from Arkansas to North Carolina), I-75 (running north-south, connecting Kentucky and Georgia), I-24 (linking Chattanooga to Nashville), and I-65 (connecting with Alabama and the Midwest). Because most semi-trucks, tractor-trailers, and commercial buses rely on air brakes for safe navigation, removing the air brake restriction from your CDL is vital for expanded job opportunities.

The Volunteer State relies on air brake-qualified drivers in key industries, including automotive manufacturing, agriculture, logistics, and tourism. Major companies requiring the air brake qualification include Nissan, General Motors, and FedEx in the manufacturing sector and Tyson Foods and Cargill in the agricultural industry. FedEx Freight, XPO Logistics, and UPS have air brake-equipped fleets in the logistics and freight sector. In the tourism industry (especially Nashville, Memphis, and Gatlinburg), companies in the charter bus service industry that rely on air brake-qualified drivers include Greyhound Lines and Tennessee Motorcoach. Additionally, most full-size school buses in Tennessee’s school districts have air brakes, requiring their drivers to hold this qualification.

The written Air Brakes knowledge test features multiple-choice questions based on the state’s CDL manual (Tennessee CDL Handbook 2025) and requires a score of at least 80% to pass. Our CDL Air Brakes Practice Tests cover everything needed to pass the official DMV Air Brakes Knowledge Test.

In addition to mimicking the official knowledge test, our Practice Tests provide instant feedback on all your Practice Test responses, so you’ll learn faster and pass the knowledge test on your first attempt!

4.64 out of 5 • 28 votes.

9 min to complete

Available in EN and ES

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What to expect on the actual TN DMV exam

questions

correct answers to pass

80%

passing score

Helpful links

TN DMV website

Official Tennessee CDL manual (2025)

More TN DMV Written Exam Resources

TN 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 Tennessee CDL Air Brakes Test

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