Air Brakes #2
Air Brakes Endorsement Test | Tennessee 2026 #2 Page 3 of 4
Train for FREE online with our Tennessee CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a TN Class A/Class B driver license in 2026, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that the requirements for CDL may vary from state to state.
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13 . A vehicle equipped with an Anti-Lock Braking System (ABS) uses a ____ light to warn that the system is not working properly.
White
Anti-Lock Braking System (ABS) malfunction lamps are usually yellow. Even if the ABS isn't working properly, a driver will still have access to the vehicle's usual braking functions.
14 . During a walk-around inspection, ensure there are no cracks on the brake drums that are more than ____ of the width of the friction area.
One tenth
Before beginning a trip, it is important to check the brake drums during your walk-around inspection. It is unsafe to drive if any brake drum has a crack more than one half of the width of the friction area.
15 . Emergency brakes:
All trucks, truck tractors, and buses must be equipped with emergency brakes and parking brakes.
16 . A low air pressure warning signal:
A vehicle with air brakes must be equipped with a low air pressure warning signal. If the warning signal goes off while a vehicle is being driven, the driver should bring the vehicle to a complete stop and have the system repaired.
17 . When operating a vehicle with a dual air brake system, the driver should:
Before driving a vehicle with a dual air brake system, allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems. Watch the air pressure gauges to monitor the pressure levels.
18 . ____ make up the emergency brake system.
In an air brake system, there are three different braking systems: a service brake system, a parking brake system, and an emergency brake system. The emergency brake system uses parts of both the parking and service brake systems.
See the exact questions that will be on the 2026 Tennessee DMV exam.
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Lillian MCcranie explains how our CDL study guide was helpful in passing the exam and recommends it to everyone.
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2026 Tennessee | Frequently Asked Questions
A CDL Class B license in Tennessee allows the holder to operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not exceeding 10,000 pounds. This includes buses, farm labor vehicles, and any vehicle designed to transport 16 to 23 passengers, including the driver.
With a Class B CDL license in Tennessee, you can operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or tow a vehicle not heavy than 10,000 pounds. It includes straight trucks, large passenger buses, segmented buses, box trucks, dump trucks with small trailers, and trucks with small trailers.
To acquire a Class B CDL license in Tennessee, you must be at least 21 years old (or 18 for in-state transport only), possess a valid Tennessee driver's license, pass a vision test, and complete a Commercial Driver License Application. You also need to pass a written knowledge test and a skills test which includes pre-trip vehicle inspection, basic controls, and on-road driving.
In Tennessee, you must be at least 21 years old to qualify for a Class B CDL license for interstate commerce. However, if you plan to drive only within the state (intrastate commerce), you can obtain a Class B CDL license at the age of 18.
While specific endorsements are not necessary to obtain a basic Class B CDL license, they can enhance your licensure. Endorsements certify you to drive certain types of vehicles or transport specific cargo. For instance, a passenger or school bus endorsement allows you to drive such vehicles, while a hazardous materials endorsement permits you to transport hazardous cargo.
The Class B CDL skills assessment in Tennessee includes three parts: a pre-trip vehicle inspection to verify that you can assess if your vehicle is safe to drive, a basic vehicle controls test to check your ability to control the vehicle, and an on-road driving test to examine your practical driving skills in various traffic situations and conditions.
Yes, Class B CDL license holders in Tennessee are limited to operating single vehicles with a GVWR of 26,001 or more pounds, or a towed vehicle not exceeding 10,000 pounds GVWR. They are not authorized to drive a Class A vehicle unless they upgrade their license. Endorsements may be required for certain types of vehicles like school buses or tank vehicles.
In Tennessee, the written Class B CDL test is generally administered in English. However, the state may offer the test in other languages. It's recommended to contact the Tennessee Department of Safety & Homeland Security for specific information on language availability for the written test.
Yes, in Tennessee, you can request accommodations for the Class B CDL written exam if you have a disability. The Department of Safety and Homeland Security works to ensure all testing materials and methods are accessible. You should contact your local Driver Services Center in advance to discuss your needs and arrange appropriate accommodations.
If you fail the Class B CDL written test in Tennessee, you can retake it. However, you must wait at least one day before attempting the test again. There is no limit to the number of times you can retake the test, but a fee applies each time. It's recommended to study thoroughly before retesting.
