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
A CDL Class A license in West Virginia is a commercial driver's license that permits the holder to operate any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more, provided the towed vehicle(s) exceed 10,000 pounds. This includes tractor-trailer trucks, truck and trailer combinations, tank vehicles, and livestock carriers.
A Class A CDL license allows you to operate a variety of large vehicles such as tractor-trailers, truck and trailer combinations, tank vehicles, and livestock carriers. It also permits driving any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more, provided the towed vehicle(s) are over 10,000 pounds.
To obtain a Class A CDL license in West Virginia, you must be at least 18 years old (21 for interstate driving), possess a valid non-commercial driver's license, pass a vision test, and complete a medical examination. You'll also need to pass both a written knowledge test and a skills test, which includes a pre-trip vehicle inspection, a basic vehicle control test, and an on-road driving exam.
In West Virginia, you must be at least 18 years old to qualify for a Class A CDL license for intrastate driving (within the state). However, to drive interstate (across state lines) or to transport hazardous materials, you must be at least 21 years old.
Specific endorsements are not required for a basic Class A CDL in West Virginia, but they can enhance your license. Endorsements like H (Hazardous materials), N (Tank vehicles), P (Passenger vehicles), and T (Double/Triple trailers) allow you to operate specific types of vehicles and can broaden your employment opportunities. Each endorsement requires passing additional tests.
The Class A CDL skills test in West Virginia encompasses three components: a pre-trip vehicle inspection to test your ability to determine if your vehicle is safe to drive, a basic vehicle control test to show you can control your vehicle, and an on-road driving test to demonstrate your ability to safely operate your vehicle in various road and traffic conditions.
Yes, there can be limitations for Class A CDL license holders in West Virginia. These restrictions are based on the driver's skills or the type of vehicle they can operate. Examples include "L" for air brake restrictions, "Z" for full air brake restrictions, and "E" for no manual transmission equipped commercial motor vehicle. Restrictions are listed on the license.
In West Virginia, the written Class A CDL test is primarily administered in English. This is in accordance with federal regulations requiring a "basic understanding" of English to ensure safety on the roads. However, assistance may be available for those with limited English proficiency, such as a translator, but it's best to check with the local DMV for specific options.
Yes, accommodations can be made for the Class A CDL written test in West Virginia if you have a disability. It's advised to contact the West Virginia Division of Motor Vehicles ahead of time to discuss your specific needs. Accommodations can include things like extra time, a quiet room, or a reader or scribe for the test.
Yes, you can retake the Class A CDL written test in West Virginia if you don't pass on the first try. However, there's a waiting period of at least one day before you can retake it. You may also be required to pay a retest fee. It's recommended to study thoroughly before retaking the test to increase your chances of passing.