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View All Plans- Updated for March 2025
- Based on 2025 VT commercial driver's license manual
Free Vermont CDL Air Brakes Test 2025
If you don’t pass the Vermont DMV CDL Air Brakes Knowledge Test, your CDL will include the restriction “L,” which will prohibit you from operating commercial motor vehicles (CMVs) with air brakes. Failing the test in Vermont results in a one-day waiting period and a fee should you decide to retake the test. No worries! Our Vermont DMV CDL Air Brakes Practice Tests are designed to help you pass your knowledge exam on the first attempt.
A CDL without an air brake restriction is necessary for countless job opportunities in Vermont because most semi-trucks, tractor-trailers, and commercial buses rely on air brakes for safe navigation. With the Green Mountains and the steep and winding roads, skilled air brake-qualified drivers are a necessity in Vermont. Additionally, the winter months bring snow, ice, and freezing rain, which demand reliable air brake handling. Key transportation routes include I-89 (a north-south route connecting Burlington to New Hampshire and Canada), I-91 (running along eastern Vermont, linking New Hampshire and Massachusetts), US-7 (a major north-south corridor), and US-4 (running through the mountains) make braking expertise essential. The restriction “L” severely limits your job opportunities in the transportation industry.
The Green Mountain State relies on drivers with the air brake qualification in key industries, including dairy and maple syrup production (a major part of the economy), forestry and logging, and tourism. Major companies requiring this qualification include Goodrich Maple Farm and Farm Connex in the agriculture industry and Emerson & Sons Logging and Hot Shot Trucking in the forestry sector. Premier Coach (Williston) and Green Mountain Transit are major tourism and charter bus companies in Vermont. Each school district requires air brake-qualified drivers for its inventory of full-size school buses. The “L” restriction disqualifies you from these and many other jobs.
The written Air Brakes knowledge test features multiple-choice questions based on the state’s CDL manual (Vermont CDL Handbook 2025) and requires a score of at least 80% to pass. Our CDL Air Brakes Practice Tests cover all essentials for the official DMV Air Brakes Knowledge Test. While studying, you will also learn information useful for passing your skills test.
Our Practice Tests mimic the official knowledge test and offer immediate feedback on all responses instead of at the end of the assessment. This approach dramatically speeds learning 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 VT DMV exam
questions
correct answers to pass
passing score
List of questions (classic view)
- What is the best way to test if your vehicle's spring brakes come on automatically?
- The purpose of a supply pressure gauge is
- Slack adjusters are
- Under which conditions are front wheel brakes good?
- Which of the following is NOT part of the drum brake?
- How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
- Which vehicles must have low air pressure warning signals?
- Which of the following are true about a dual air brake system?
- If the air tanks are not drained,
- After the initial drop, the maximum acceptable leakage rates per minute are
- Spring brakes are
- The tractor protection valve
- At what measurement is the safety valve USUALLY set to open?
- When should you drain your air tanks?
- How do brakes work on a long, steep downgrade?
- An antilock braking system (ABS)
- What is the best way to test your vehicle's low air pressure warning signal?
- 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?
- Why must you pass a knowledge test on air brakes?
- 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?
- Which of the following should you do before leaving your vehicle unattended?
- Which of the following can cause brakes to fade or fail?
- Which of the following is NOT part of the air brake system?
- 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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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.
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- 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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