Combination Vehicles Practice Test | Vermont 2026 #2

Train for FREE online with our Vermont CDL combination vehicle 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 combination license in 2026, 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 DMV requirements for issuing a combination license may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

1 . Which of the following will not help prevent a rig from rolling over?

Keeping the cargo as close to the ground as possible

Driving slowly around turns

Driving on the shoulder of a road

To help prevent a rig from rolling over, you should keep the weight of the cargo as close to the ground as possible when loading. You should also drive slowly around turns.

2 . If unsure if a trailer has an Anti-Lock Braking System (ABS), you can:

Look under the trailer for wheel speed sensors coming from the back of the brakes.

Remove a tire and look for the ABS sensor on the axle.

Assume it does have ABS.

If you do not know whether or not a trailer is equipped with ABS, look under the vehicle for the electronic control unit and wheel speed sensor wires coming from the back of the brakes.

3 . When backing up your tractor while coupling it to a trailer, the trailer brakes should be:

Deactivated.

Locked.

Unlocked.

Correctly following the steps to couple and uncouple trailers is vital to safely operating a combination vehicle. Before backing your tractor under the trailer while coupling, make sure your trailer brakes are locked.

4 . When coupling, you should:

Make sure to couple the proper glad hands.

Only couple one set of glad hands.

It is best to leave one glad hand loose.

When coupling air brake hoses, you should make sure the proper pairs of gland hands are connected. They are sometimes color-coded to help drivers avoid mistakes. Typically, blue is used for service lines and red is used for emergency lines.

5 . Rearward amplification refers to:

The amount of noise projected to the rear of a vehicle.

The cause of the "crack-the-whip" effect.

The number of trailers that can be pulled by a tractor.

Vehicles with trailers are vulnerable to rollover due to the "crack-the-whip" effect, which is caused by rearward amplification.

6 . To control surge when stopping, you should not:

Keep a steady pressure on the brakes.

Brake well in advance of a stop.

Release the brakes too quickly.

To reduce the risk of a surge in a tank vehicle, slow or stop while keeping a steady pressure on the brakes and do not release the brakes too early. Brake well in advance of a stop and increase your following distance.

7 . If the emergency air line loses pressure:

The Anti-Lock Braking System will activate.

The service air line will activate.

The emergency brakes will activate.

The emergency air line controls the emergency brakes on a combination vehicle. A loss of air pressure in the emergency line will cause the emergency trailer brakes to activate.

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2026 Vermont | Frequently Asked Questions

To secure a CDL Doubles/Triples endorsement in Vermont, you must already possess a Commercial Driver's License (CDL). You then need to pass the Doubles/Triples Endorsement Test that covers handling, coupling/uncoupling, and inspecting double/triple trailers. The Vermont DMV provides a manual to help prepare for this examination. Always check with the local DMV for specific requirements.

To obtain a CDL Doubles/Triples license in Vermont, you must already possess a valid CDL. You'll then need to pass the Doubles and Triples Endorsement Test, which covers knowledge of coupling and uncoupling, inspecting doubles and triples, and the proper procedures for towing double/triple trailers. A road skills test may also be required.

While Vermont does not specifically mandate specialized training for a CDL Doubles/Triples endorsement, it's highly recommended. The endorsement test covers specific knowledge related to handling double/triple trailers. Experience or training can greatly assist in understanding these elements and passing the test. Remember, a valid CDL is a prerequisite before you can apply for this endorsement.

Yes, to obtain a CDL Doubles/Triples endorsement in Vermont, you are required to pass the Doubles and Triples Endorsement Test. This written exam covers knowledge about coupling and uncoupling, inspecting doubles and triples, and procedures for towing double/triple trailers. However, a road skills test may not always be necessary.

The CDL Doubles/Triples endorsement test in Vermont is typically a written test. It doesn't require you to demonstrate physical maneuvers. The test covers topics like coupling/uncoupling, inspecting doubles and triples, and towing procedures. However, if a road test is required, you may need to demonstrate skills like safely driving, turning and parking double/triple trailers.

No, it's not permissible. In Vermont, as in the rest of the United States, you must have a valid CDL with a Doubles/Triples endorsement to legally operate double or triple trailers. Driving such vehicles without the appropriate endorsement can result in significant fines, penalties, and even loss of your commercial driving privileges.

To obtain the CDL Doubles/Triples endorsement in Vermont, you must initiate a new application. You cannot simply append the endorsement to your current license. You will need to complete the necessary paperwork, pass the required knowledge and skills tests, and pay the appropriate fees to add this endorsement to your CDL.

Yes, there are limitations for drivers with a CDL Doubles/Triples endorsement. For instance, drivers must comply with federal and state driving hours regulations. Additionally, they must pass regular drug and alcohol tests. Furthermore, they must maintain a clean driving record, as serious violations could lead to temporary or permanent loss of their CDL and endorsements.

In Vermont, the maximum legal weight for a vehicle, including double/triple trailers, is 80,000 pounds. The maximum legal length for a single trailer is 53 feet. For doubles/triples, each individual trailer should not exceed 28.5 feet in length. However, the total length of the vehicle combination can vary depending on the type of connection between trailers.

Yes, there are specific safety guidelines and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Vermont. Some of these include maintaining proper following distance, using caution when turning or changing lanes, ensuring proper weight distribution, and properly securing cargo. It is important to familiarize yourself with these guidelines to ensure safe operation of double/triple trailers on the road.