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 Tank endorsement in West Virginia, you need to pass the Tank Vehicle endorsement test. This test covers topics such as inspecting tank vehicles, driving tank vehicles, and safe driving rules. You can prepare for the test by studying the West Virginia CDL handbook. Once you pass the test, the endorsement will be added to your CDL.
To obtain a CDL Tank license, you must already hold a Commercial Driver's License (CDL). You must then pass the Tank Vehicle endorsement test, which covers inspecting tank vehicles, driving tank vehicles, and safe driving rules. It's essential to study the relevant sections in your state's CDL manual to prepare for this test.
While specific training or experience isn't mandatory for a CDL Tank endorsement in West Virginia, it's highly recommended. Training can provide knowledge on the complexities of handling tank vehicles, including load distribution and liquid surge. Experience driving similar vehicles can be beneficial. However, passing the Tank Vehicle endorsement test is the only legal requirement.
Yes, to obtain a CDL Tank endorsement in West Virginia, you must pass the Tank Vehicle endorsement test. This written exam covers topics such as inspecting tank vehicles, driving tank vehicles, and safe driving rules. It's an additional test beyond the general CDL knowledge exam. Study materials are available in the West Virginia CDL handbook.
The written test for the CDL Tank endorsement covers several topics. These include inspecting tank vehicles, driving tank vehicles, and understanding the unique properties of liquid cargo. It also covers safety rules specific to tank vehicles, such as weight distribution and handling high center of gravity, and the effects of surge on control and stability.
The CDL Tank endorsement assessment does not involve a skills or maneuvers test. It's a written examination that focuses on knowledge related to tank vehicles. Topics include inspecting tank vehicles, understanding weight distribution, handling bulk packages, and managing high center of gravity. Practical driving skills are assessed during the general CDL skills test, not the Tank endorsement test.
Drivers with a CDL Tank endorsement are subject to federal regulations, which include maintaining a logbook, adhering to hours of service rules, and passing regular drug and alcohol tests. Additionally, certain hazardous materials may require a Hazmat endorsement. It's also important to note that each state may have its own additional requirements or restrictions for CDL Tank endorsement holders.
No, a valid CDL Tank endorsement is required to transport liquid or gaseous materials in a tank vehicle. This includes any commercial vehicle designed to transport any liquid or gaseous materials within a tank or tanks having an individual rated capacity of more than 119 gallons and an aggregate rated capacity of 1,000 gallons or more.
Yes, a CDL Tank endorsement can be added to your current Commercial Driver's License. You don't need to apply for a new license, but you will need to pass the Tank Vehicles knowledge test. Once you pass the test, the endorsement will be added to your existing CDL. Always check with your local DMV for specific procedures and requirements.
Yes, there are specific regulations and prerequisites in place for handling hazardous materials with a CDL Tank endorsement in West Virginia. These include passing a written exam, undergoing a background check, and obtaining a Transportation Worker Identification Credential (TWIC) if applicable. Additionally, drivers must follow federal regulations regarding the transportation of hazardous materials and adhere to any additional state-specific requirements.