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.
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2025 West Virginia | Frequently Asked Questions
A CDL Class B license in West Virginia allows the holder to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not exceeding 10,000 pounds. This typically includes buses, dump trucks, delivery trucks, and straight trucks. This license also requires specific endorsements for certain vehicles.
A Class B Commercial Driver's License (CDL) in West Virginia allows you to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing a vehicle not in excess of 10,000 pounds GVWR. This includes buses, farm labor vehicles, and trailers.
To acquire a Class B CDL license in West Virginia, you must be at least 18 years old, possess a valid non-commercial driver's license, and pass a vision test. You'll also need to pass written knowledge tests, obtain a Commercial Learner's Permit (CLP), and complete a skills test in the vehicle type that your Class B CDL will cover.
In West Virginia, you must be at least 18 years old to qualify for a Class B Commercial Driver's License (CDL). However, to drive interstate or to carry hazardous materials, you must be at least 21 years old. Please remember, other requirements also apply.
Specific endorsements are not necessary for a Class B CDL license but can be added based on the type of vehicle you plan to drive or the cargo you will carry. For example, passenger (P) or school bus (S) endorsements are required to drive buses. A tanker (N) endorsement is needed for liquid cargo, and a hazardous materials (H) endorsement is necessary for transporting hazardous materials.
The Class B CDL skills assessment in West Virginia includes three parts: a pre-trip vehicle inspection, a basic vehicle control test, and a road test. You'll be required to demonstrate your ability to inspect your vehicle, show basic control by moving your vehicle forward, backward, and turning it within a defined area, and finally, drive on the road in various traffic situations.
Yes, Class B CDL license holders in West Virginia are restricted to operating vehicles with a GVWR of 26,001 pounds or more, or any such vehicle towing another not in excess of 10,000 pounds. They can't operate Class A vehicles without the proper endorsement. Also, to transport passengers or hazardous materials, specific endorsements are required.
Yes, in West Virginia, the written test for a Class B CDL can be taken in languages other than English. However, it is important to note that the Federal Motor Carrier Safety Administration requires all commercial drivers to read and speak English sufficiently to converse with the general public, understand highway traffic signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, West Virginia Division of Motor Vehicles (DMV) provides accommodations for individuals with disabilities taking the Class B CDL written exam. You will need to request these accommodations in advance. This may include providing reading assistance for those with visual impairments or learning disabilities. Contact your local DMV office for specific information on how to request accommodations.
Yes, you can retake the Class B CDL written test in West Virginia if you fail on your first attempt. There's a waiting period of one day before you can retake the test. However, keep in mind that each retest incurs a fee. It's advisable to study thoroughly using the CDL manual and practice tests before attempting again.
