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View All Plans- Updated for March 2025
- Based on 2025 VA commercial driver's license manual
Free Virginia CDL Air Brakes Test 2025
Securing a CDL without an air brake restriction is vital for expanded job opportunities in Virginia. Most semi-trucks, tractor-trailers, and commercial buses rely on air brakes for safe navigation. If you don’t pass the Virginia DMV CDL Air Brakes Knowledge Test, your CDL will include the restriction “L,” prohibiting you from operating commercial motor vehicles (CMVs) with air brakes. The steep grades of the Appalachian Mountains and Blue Ridge Parkway, and the rolling hills of the Piedmont, demand air brakes on heavy CMVs. The coastal plains and tidewater region are prone to flooding and slick road conditions, and winter’s ice and snow add additional hazards. Failing the air brakes test in Virginia results in a one-day waiting period (and retest fee) should you decide to retake the test. Our Virginia DMV CDL Air Brakes Practice Tests help you pass your knowledge exam on the first attempt.
The stop-and-go traffic of Virginia’s urban areas and major highways compounds the need for reliable air brakes. Major transportation routes include I-81 (running through western Virginia, I-64 (connecting the Blue Ridge Mountains to the coast), I-95 (running north-south along the east coast), and US-58 (running east-west).
The Old Dominion relies on drivers with the air brake qualification in key industries, including manufacturing, agriculture, logistics, defense, and energy. Major companies requiring this qualification include Newport News Shipbuilding and Northrop Grumman in the manufacturing and heavy equipment sector and FedEx Freight, UPS Freight, and XPO Logistics in the freight and logistics industry. Smithfield Foods, Perdue Farms, and Southern States Cooperative also rely on air brake-qualified drivers in the agriculture industry, as do Dominion Energy and Alpha Metallurgical Resources in energy and mining. Greyhound Lines and Virginia Motorcoach use air brake-equipped buses, as do the state school districts on full-size school buses. The “L” restriction makes the above-listed jobs unattainable.
Our CDL Air Brakes Practice Tests cover all essential knowledge for the official DMV Air Brakes Knowledge Test. The information you learn will also aid your preparations for your skills test. The written Air Brakes knowledge test features 25 multiple-choice questions based on the state’s CDL manual (Virginia CDL Handbook 2025) and requires a minimum passing score of 80%.
Our Practice Tests mimic the official knowledge test and offer real-time feedback on all responses. This helps you learn faster and ensures you pass the 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 VA DMV exam
questions
correct answers to pass
passing score
List of questions (classic view)
- When should you use the parking brake?
- At what measurement is the safety valve USUALLY set to open?
- Which of the following is NOT part of the air brake system?
- Slack adjusters are
- Which of the following can cause brakes to fade or fail?
- How would you check your truck's slack adjusters?
- Why must you pass a knowledge test on air brakes?
- Which vehicles must have low air pressure warning signals?
- What is the best way to test your vehicle's low air pressure warning signal?
- Under which conditions are front wheel brakes good?
- The purpose of a supply pressure gauge is
- How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
- An antilock braking system (ABS)
- After the initial drop, the maximum acceptable leakage rates per minute are
- If the air tanks are not drained,
- 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)?
- Which of the following will be true about your brake function if your antilock braking system (ABS) fails?
- Which of the following should you do before leaving your vehicle unattended?
- Spring brakes are
- What is the best way to test if your vehicle's spring brakes come on automatically?
- How do brakes work on a long, steep downgrade?
- Which of the following is NOT part of the drum brake?
- Which of the following are true about a dual air brake system?
- The tractor protection valve
- When should you drain your air tanks?
- 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
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Explore our rigorous, multi-tiered verification process that ensures each question mirrors the official manual for unparalleled accuracy.
At Driving-Tests.org, we understand the importance of reliable and accurate practice tests to help you prepare for your DMV exam. That's why we've developed a meticulous process to create and continually update our practice questions, ensuring they reflect the most current driving laws and regulations.
Here's an inside look at how we maintain the highest quality in our practice tests.
Content Creation and Verification Process
- Alignment with Official Manuals:
Every question we develop is based on the most recent version of each state's official driving manual. Our team regularly monitors each state DMV's website for the latest updates to ensure our practice tests are always aligned with the most current information. - Community Feedback Integration:
We leverage feedback from our vast community of users to understand which topics are most frequently tested. This helps us focus on the areas that are most relevant and beneficial for your preparation. - Expert Content Creation:
Our in-house editor, Steven, who has extensive experience in driver education, crafts each question with precision. He conducts a thorough review of each question against the official manuals to ensure accuracy. - Rigorous Review Process:
Once Steven has finalized a set of questions, our team conducts a joint review session. This second level of scrutiny involves content accuracy, proofreading, and fact-checking to eliminate any errors. - User Feedback Mechanism:
After a question goes live on our site, we keep the lines of communication open. Each question features a feedback button, inviting users to report any issues or errors. This continuous feedback loop allows us to address and rectify any concerns promptly. - Responsive Updates:
In line with our commitment to accuracy, we quickly update our practice questions to reflect any changes in the DMV manuals. Additionally, we update the free electronic copy of the state's driver's license manuals on our site, typically within a few days after the DMV publishes them.
Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your DMV exam.
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