Air Brakes #1
Air Brakes Endorsement Test | Texas 2026 #1 Page 2 of 4
Train for FREE online with our Texas 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 TX 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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7 . Which of the following is not a part of an air brake system?
An axle brake system
Air brakes consists of three separate braking systems: the service brake system, the parking brake system, and the emergency brake system.
8 . Friction inside a brake drum is caused when the brake shoes and linings:
Create excess heat.
Friction inside a brake drum is caused when the brake shoes and linings push against the inside of the drum. The friction in the drums will slow and stop the vehicle.
9 . During a static leakage test, the maximum leakage rate for a single vehicle with air brakes is ____ in one minute.
4 psi
When performing a static leakage test on a single vehicle with air brakes, the leakage rate should be no more than 2 psi in a minute. If air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
10 . A dual air brake system:
Has two separate air brake systems, but uses a single set of controls.
A dual air brake system has two separate air brake systems that use a single set of brake controls. One system typically operates the regular brakes on the rear axle or axles. The other system operates the regular brakes on the front axle.
11 . During a static leakage test, the maximum leakage rate for a double combination vehicle is:
4 psi in one minute.
When performing a static leakage test on a double combination vehicle with air brakes, the leakage rate should be no more than 3 psi in one minute. If air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
12 . To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:
Keep the control at the halfway mark.
Some pre-1975 vehicles have a front brake limiting valve, which has "normal" and "slippery" settings. The idea behind these valves was to limit the air pressure available to the front brakes when driving on slippery surfaces, and thereby reduce the danger of a front-wheel skid. Studies have found that this is not actually a concern, so if your vehicle has a front brake limiting valve, leave it in the "normal" position.
See the exact questions that will be on the 2026 Texas DMV exam.
99.2% of people who use the cheat sheet pass the FIRST TIME
Lillian MCcranie explains how our CDL study guide was helpful in passing the exam and recommends it to everyone.
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2026 Texas | Frequently Asked Questions
To acquire a CDL Tank endorsement in Texas, you must already have a Commercial Driver's License (CDL). Then, you need to pass the Tank Vehicle (N) endorsement knowledge test at your local Department of Public Safety (DPS) office. You should study the Texas CDL Handbook to prepare for this test.
Obtaining a CDL Tank license requires you to first have a Commercial Driver's License (CDL). You must then pass the Tank Vehicle (N) endorsement knowledge test. It's essential to study the related sections in the CDL Handbook before taking the test. You may also need to undergo a background check depending on the type of materials you will be transporting.
While Texas doesn't require specific training or experience for a CDL Tank endorsement, it's highly recommended to prepare for the Tank Vehicle (N) endorsement knowledge test. You can self-study using the Texas CDL Handbook. However, many choose to attend a training program to gain practical skills and knowledge, which could increase chances of passing the test.
Yes, to obtain a CDL Tank endorsement in Texas, you must pass the Tank Vehicle (N) endorsement knowledge test. This written test focuses on the handling and transportation of liquid cargo. The specific content and number of questions can vary, so it's best to prepare using resources like the Texas CDL Handbook.
The written test for the CDL Tank endorsement in Texas includes subjects such as inspecting and driving tank vehicles, safe driving practices, cargo handling and emergency procedures, and specific knowledge related to transporting liquids and gases.
The CDL Tank endorsement assessment primarily focuses on knowledge rather than specific maneuvers. You'll need to understand the inspection of tank vehicles, specifics of driving high center of gravity vehicles, safe driving practices, and how to handle emergencies. There's no specific skills test or road test for the Tank endorsement like there is for the basic CDL.
Drivers with a CDL Tank endorsement must adhere to all federal and state regulations related to transporting liquids. This includes weight limits, proper securing of cargo, and handling of hazardous materials if applicable. Furthermore, they may be subject to more frequent inspections. Violations can result in fines, CDL suspension or revocation.
No, it's illegal to transport liquid or gas materials in a tank vehicle without a valid CDL Tank endorsement. This rule applies to vehicles designed to transport 1,000 gallons or more. Violation can result in hefty fines, legal penalties, and potential suspension or revocation of your CDL. Always ensure your endorsements are up-to-date before transporting such materials.
The CDL Tank endorsement can be added to your current Commercial Driver's License (CDL). You don't need to apply for a new CDL. However, you will need to pass the Tank Vehicle endorsement knowledge test. Once you pass the test, your CDL will be updated with the Tank endorsement.
Yes, there are specific regulations and prerequisites for handling hazardous materials with a CDL Tank endorsement in Texas. These include obtaining a hazardous materials endorsement, passing a background check, completing specialized training, and adhering to strict safety protocols when transporting, loading, and unloading hazardous materials.
