Air Brakes #2
Air Brakes Endorsement Test | Vermont 2025 #2 Page 4 of 4
Train for FREE online with our Vermont 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 VT 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.
25
20
20
19 . What should happen before the air pressure in an air brake system tank falls below 55 psi?
The low air pressure warning signal must activate before the air supply pressure drops below 55 psi in the air tank. If the warning signal does not turn on when being tested during an inspection, the vehicle is not safe to drive.
20 . Braking mechanisms are located inside:
Drum brakes are attached to the wheels and located on the axles of a vehicle. The braking mechanisms that cause the vehicle to stop can be found inside of a drum brake.
21 . During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?
When performing a static leakage test on a double combination vehicle with air brakes, the leakage rate should be no more than 3 psi in one minute. If the air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
22 . What kind of brakes do most newer heavy-duty trucks use?
Most newer heavy-duty vehicles use dual air brake systems. A dual air brake system has two separate air brake systems which use a single set of brake controls.
23 . What is often found in compressed air?
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.
24 . Air tank drains:
Compressed air in an air brake system usually has a certain amount of water and oil in it. This can harm the system if allowed to accumulate. Air tanks have drain valves to aid in removing water and oil from the compressed air.
25 . Anti-Lock Braking Systems (ABS):
If equipped, ABS is in addition to a vehicle's normal braking system and does not increase or decrease the braking power of any other system. ABS only activates when a vehicle's wheels are about to lock.
Search the best driving school in your neighbourhood
2025 Vermont | Frequently Asked Questions
To secure a CDL Bus endorsement in Vermont, you need to have a valid Commercial Driver's License (CDL). You then need to pass the passenger endorsement knowledge test and the school bus endorsement knowledge test. After passing these tests, you must successfully complete a skills test in the type of school bus you will be driving.
To obtain a CDL Bus license in Vermont, you must have a valid driver's license and pass the CDL general knowledge test. Then, you'll need to get a Commercial Learner's Permit (CLP) and practice on public roads with a qualified CDL holder. After that, pass the CDL skills tests, which include vehicle inspection, basic controls, and road test.
While Vermont doesn't explicitly require specific training for a CDL Bus endorsement, it's highly recommended. Training can help you pass the written knowledge tests and the skills test, which includes pre-trip vehicle inspection, basic vehicle controls, and on-road driving. Experience in driving similar vehicles can also be beneficial.
CDL Bus licenses in Vermont are classified under Class B or Class C. Class B CDL is for single vehicles like city buses. Class C CDL is for vehicles designed to transport 16 or more passengers, including the driver, not covered by Class B. Each class requires passing specific written knowledge tests and skills tests related to the type and size of the vehicle.
No, you cannot use your personal vehicle for the CDL Bus driving test in Vermont. The vehicle used for the test must match the class and type of vehicle you will be driving with your CDL. For a bus endorsement, this means using a commercial bus of the correct capacity and type.
The CDL Bus driving test in Vermont evaluates skills like pre-trip vehicle inspection, basic vehicle control, and on-road driving. You may be asked to perform maneuvers such as backing up, parallel parking, or docking in a designated area. On-road driving evaluates your ability to handle intersections, railway crossings, curves, and various traffic conditions.
Yes, additional medical prerequisites are required for a CDL Bus endorsement in Vermont. Applicants must pass a Department of Transportation (DOT) physical examination every 24 months. This exam assesses general physical health, vision, hearing, and the potential presence of other conditions that could affect driving ability, such as diabetes or high blood pressure.
No, it's not permissible to transport passengers without a valid CDL Bus endorsement in Vermont. The endorsement is required for drivers who wish to operate a vehicle designed to carry 16 or more passengers, including the driver. Driving without the proper endorsement can result in legal penalties, including fines and suspension of your CDL license.
The CDL Bus endorsement can be added to your existing CDL license in Vermont. You don't need to apply for a new license altogether. However, you will need to pass the Passenger Endorsement Knowledge Test and a skills test in the vehicle type you wish to be endorsed for. Ensure to have your current CDL when you apply for the endorsement.
Yes, there are restrictions for drivers with a CDL Bus endorsement in Vermont. Drivers must comply with federal hours of service regulations, which limit driving hours to prevent fatigue. Also, drivers must pass a physical exam every two years and are subject to random drug and alcohol testing. Additionally, any traffic violations or accidents can result in the suspension or revocation of the endorsement.
