Air Brakes #1
Air Brakes Endorsement Test | West Virginia 2025 #1 Page 4 of 4
Train for FREE online with our West 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 WV Class A/Class B driver license in 2025, 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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19 . Applying the brake pedal causes air pressure to activate an electric switch and:
Turn off the low pressure warning light.
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.
20 . What is brake lag?
How faded the brakes are
Because air takes time to flow through the air lines to the brakes, air brakes cannot begin working instantly. There is often a brake lag of at least one-half of a second between the moment the brake pedal is pressed and the moment the brakes begin to work. On vehicles with hydraulic brakes, the brakes work instantly when the pedal is pressed.
21 . If the air pressure warning light comes on, you should:
Safely exit the roadway and stop.
If the low air pressure warning signals activate, it is essential that you bring the vehicle to a safe stop while you are still able to control the brakes.
22 . Why do you need to drain air tanks regularly?
To remove bad air from the tanks
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.
23 . When you need to stop in an emergency, you should:
Expect your vehicle to slow down more quickly than usual.
If you need to make an emergency stop, you can use either the controlled braking method or the stab braking method. It's important to brake in a way that keeps your vehicle traveling in a straight line while still allowing you to turn, if necessary.
24 . The emergency brake system uses:
Only parts unique to 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.
25 . What does ABS do?
Prevent the brakes from being used if downshifting would be more effective
The purpose of an Anti-Lock Braking System (ABS) is to prevent wheels from locking up during hard applications of the brakes, especially on slippery surfaces.
2025 West Virginia | Frequently Asked Questions
To acquire a CDL Hazmat endorsement in West Virginia, you must already possess a valid CDL. Then, pass the Hazmat knowledge test at a DMV office. Before the test, you need to complete a hazardous materials endorsement application and pass a TSA background check. Finally, pay the required fees to receive your endorsement.
To obtain a CDL Hazmat license, you must already possess a valid Commercial Driver's License (CDL). You should be at least 21 years old and have U.S citizenship or legal Permanent Resident status. Prior to the Hazmat knowledge test, you must pass a Transportation Security Administration (TSA) background check. Good driving record and physical fitness are also required.
When applying for a CDL Hazmat endorsement, you'll need to provide proof of U.S. citizenship or permanent legal residency (like a birth certificate or green card), your valid Commercial Driver's License (CDL), and a completed Hazardous Materials Endorsement application. You'll also need to provide fingerprints for the background check conducted by the Transportation Security Administration.
Yes, there is a dedicated written test for the CDL Hazmat endorsement. This test is designed to evaluate your knowledge of the rules and regulations related to transporting hazardous materials. It covers topics like loading and unloading hazardous materials, bulk packaging marking, driving and parking rules, and emergency response procedures.
The written test for the CDL Hazmat endorsement covers various subjects related to hazardous materials. These include identifying different types of hazardous materials, understanding shipping papers, placarding rules, loading and unloading procedures, emergency response procedures, and safety protocols. The test also covers federal and state regulations for transporting hazardous materials.
Yes, there are extra charges associated with acquiring a CDL Hazmat endorsement in West Virginia. These include fees for the written test, fingerprinting, background check, and endorsement itself. The exact amount can vary, so it's recommended to check with the local DMV for the most current fees.
Yes, background checks and security clearances are mandatory for the CDL Hazmat endorsement. This includes a fingerprint-based TSA (Transportation Security Administration) security threat assessment. The purpose is to ensure the driver doesn't pose a security risk while transporting hazardous materials.
Yes, specialized training and certification are required for the CDL Hazmat endorsement. In addition to passing the general CDL test, applicants must pass a specific Hazmat knowledge test. They must also undergo a TSA background check. The endorsement is then added to their commercial driver’s license upon successful completion of these requirements.
No, you cannot legally transport hazardous materials without a valid CDL Hazmat endorsement in West Virginia, or in any other state. This endorsement ensures that the driver has the necessary training and knowledge to handle hazardous materials safely and appropriately. Violating this requirement can lead to serious penalties.
Yes, you can add the CDL Hazmat endorsement to your current CDL license. However, it requires passing the Hazmat knowledge test and a TSA background check. Once these steps are successfully completed, the Hazmat endorsement is added to your existing CDL without needing a new license.