Air Brakes #1
Air Brakes Endorsement Test | Virginia 2026 #1 Page 3 of 4
Train for FREE online with our Virginia 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 VA 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 . What kind of force do emergency brakes use?
Air brakes are really three different braking systems: the service brake, the parking brake, and the emergency brake. Emergency and parking brakes are applied with mechanical force.
14 . Brake fade is a result of:
If brakes are overused, they can become too hot. This overheating causes them to fade, making them less effective at slowing the vehicle.
15 . If the safety relief valve in an air brake system is releasing air:
The safety relief valve in an air brake system releases air if necessary to prevent pressure in the system from becoming too high. If the valve starts releasing air, there is something wrong. Have a mechanic fix the problem.
16 . The ____ are activated by an electric switch that is triggered by the brake pedal.
In a vehicle with air brakes, the brake lights are activated when the brake pedal is pushed and air pressure moves an electric switch. With the application of air pressure, the switch will then turn on the brake lights.
17 . What is often found in compressed air?
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Tanks must be drained regularly to remove this build-up.
18 . Foundation brakes are used:
Foundation brakes are used on each wheel of a CMV. The most common type of foundation brake is the s-cam drum brake.
2026 Virginia | Frequently Asked Questions
To acquire a CDL Tank endorsement in Virginia, you must possess a valid commercial driver's license (CDL). Then, study for the tank vehicle test using Virginia's CDL manual. Once you're prepared, schedule and pass the written tank vehicle endorsement test at a Virginia Department of Motor Vehicles (DMV) testing center. The endorsement will be added to your CDL upon passing.
To obtain a Commercial Driver's License (CDL) Tank endorsement, you must already hold a valid CDL. You'll need to study for and pass a written tank vehicle test. This test covers topics like tank structure, inspecting tank vehicles, and driving tank vehicles. The test can be taken at your local Department of Motor Vehicles (DMV).
While Virginia doesn't require specific training or experience to obtain a CDL Tank endorsement, it's highly recommended to study the CDL manual, especially sections related to tank vehicles. This helps ensure you're prepared for the written test. Practical experience driving tank vehicles can also be beneficial, but it's not a mandatory requirement.
Yes, to obtain a CDL Tank endorsement in Virginia, you are required to pass the Tank Vehicle Knowledge Test. This written exam tests your understanding of correct procedures for loading and unloading liquid cargo, inspecting tank vehicles, and understanding the differences between baffled and unbaffled tanks.
The written test for the CDL Tank endorsement covers various subjects, including the inspection of tank vehicles, understanding the structure and purpose of baffles, knowledge of how liquid surge can affect vehicle control, and safe driving rules specific to tank vehicles. The test is designed to ensure drivers can safely operate such vehicles.
The CDL Tank endorsement assessment primarily focuses on your understanding of tank vehicles and their operation. You'll be evaluated on your knowledge of the vehicle's structure, how to properly inspect it, handling high center of gravity, driving techniques to control surge, and how to load and unload. It doesn't typically involve practical driving maneuvers.
Drivers with a CDL Tank endorsement must follow certain rules. They are required to properly inspect and maintain their vehicle, manage the weight of the liquid cargo, and follow specific procedures for loading and unloading. They must also comply with hours of service regulations, and cannot transport hazardous materials unless they also hold a Hazmat endorsement.
No, you cannot legally transport liquid or gas materials in a tank vehicle without a valid CDL Tank endorsement. This endorsement is specifically designed to ensure drivers have the necessary skills and knowledge to safely handle such vehicles. Driving a tank vehicle without the proper endorsement can result in legal penalties.
Yes, the CDL Tank endorsement can be added to your current Commercial Driver's License. You don't need to apply for a new license. However, you must pass the tank vehicle endorsement test. Once you pass, your license will be updated to reflect this endorsement. Always check with your local DMV for specific procedures.
Yes, to handle hazardous materials with a CDL Tank endorsement, you must also possess a Hazardous Materials (Hazmat) endorsement. This requires passing an additional knowledge test and a TSA background check. The Hazmat endorsement ensures you are aware of the safety protocols and regulations for transporting hazardous substances.