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View All PlansFree West Virginia CDL Air Brakes Test 2025
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Based on 2025 WV commercial driver's license manual
- Triple-checked for accuracy
- Updated for August 2025
Failure to pass the West Virginia DMV CDL Air Brakes Knowledge Test means that your CDL will include the restriction “L.” This restriction negatively impacts your job prospects by preventing you from operating commercial motor vehicles (CMVs) with air brakes. Failing the air brakes test in West Virginia also results in a one-day waiting period and a fee should you decide to retake the test. Our West Virginia DMV CDL Air Brakes Practice Tests provide the tools to pass on the first attempt.
From the steep grades and sharp curves of the Appalachian Mountains to its narrow, winding rural roads, West Virginia poses challenging driving conditions that demand the reliability of an air brake system. Air brake-qualified drivers are essential for the transport of goods, especially when winter ice and snow compound the road hazards. Key transportation routes that require skilled air brake operation include I-64 (an east-west mountainous highway), I-77 (connecting West Virginia to Ohio and other Appalachian regions), and US-50 (featuring steep grades and sharp curves). Since most semi-trucks, tractor-trailers, and commercial buses rely on air brakes for safe navigation, removing the air brake restriction from your CDL is crucial for expanded job opportunities.
The Mountain State relies on drivers with the air brake qualification in key industries, including coal, chemical manufacturing, tourism, and forestry. Companies requiring air brake qualified drivers include Mountain State Waste (Charleston) and Eagle Freight System (Huntington) in the trucking industry, as well as Greyhound Lines and Kanawha Valley Regional Transportation Authority (both out of Charleston) in the charter bus industry. The coal and mining industry in West Virginia relies on air brake-qualified drivers in companies like Black Hawk Mining, LLC, Coal-Mac, LLC, and Alpha Metallurgical Resources. Additionally, West Virginia’s school districts use air brakes on their full-size buses and provide jobs for hundreds of qualified drivers. The “L” restriction makes these opportunities unattainable.
The multiple-choice Air Brakes knowledge test is based on the state’s CDL manual (West Virginia CDL Handbook 2025) and requires a minimum passing score of 80%. Our CDL Air Brakes Practice Tests fully prepare you for the official DMV Air Brakes Knowledge Test. Additionally, the information you learn will help prepare you for your skills test.
You’ll receive instant feedback on all our Practice Test responses, and our tests mimic the official knowledge test. This method speeds learning and ensures you pass the knowledge test!
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Triple-checked for accuracy
What you need to know
What to expect on the actual WV DMV exam
questions
correct answers to pass
passing score
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Experience the Driving-Tests differenceList of questions (classic view)
- Which of the following is NOT part of the braking process when you're driving a tractor-trailer combination vehicle with an antilock braking system (ABS)?
- How would you check your truck's slack adjusters?
- At what measurement is the safety valve USUALLY set to open?
- How do brakes work on a long, steep downgrade?
- When should you drain your air tanks?
- Which of the following will be true about your brake function if your antilock braking system (ABS) fails?
- When should you use the parking brake?
- Which of the following should you do before leaving your vehicle unattended?
- Which of the following are true about a dual air brake system?
- How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
- If the air tanks are not drained,
- Spring brakes are
- Which of the following is NOT part of the air brake system?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- Slack adjusters are
- An antilock braking system (ABS)
- Which of the following is NOT part of the drum brake?
- What is the best way to test your vehicle's low air pressure warning signal?
- Which of the following can cause brakes to fade or fail?
- The purpose of a supply pressure gauge is
- The tractor protection valve
- Which vehicles must have low air pressure warning signals?
- Under which conditions are front wheel brakes good?
- After the initial drop, the maximum acceptable leakage rates per minute are
- Why must you pass a knowledge test on air brakes?
- The low air pressure warning signal will come on before the pressure in the air tanks falls below
- A low pressure warning signal is required on
- All vehicles equipped with air brakes have
- With air brake-equipped vehicles, the parking brakes should be used
- The use of air brakes on a downgrade is only a supplement to the