Combination Vehicles Practice Test | New Hampshire 2026 #2

Train for FREE online with our New Hampshire 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 NH 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 . Pushing in the trailer air supply control will:

Supply the trailer with air.

Deactivate the air brakes.

Prevent the vehicle from skidding.

Push in the trailer air supply control to supply the trailer with air. Pull out the trailer air supply control to turn off the air supply and activate the emergency brakes.

2 . When a combination vehicle goes around a corner:

The turn should be made as tightly as possible.

The front and rear wheels move in different paths.

The rear wheels should run over the curb.

It is acceptable for street signs to be knocked over if they are too close to the road.

When a vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is called off-tracking. This effect is especially pronounced on vehicles with trailers.

3 . When backing a trailer, how should you turn the steering wheel?

Turn the top of the steering wheel in the direction you want the trailer to go.

Turn the top of the steering wheel in the direction opposite of where you want the trailer to go.

It doesn’t matter.

It depends on where the trailer is being backed.

When backing with a trailer, turn the top of the steering wheel in the direction opposite of where you want to go. Once the trailer begins turning, you should then switch the direction of the steering wheel to follow the trailer.

4 . After connecting the air lines to the trailer while coupling, you should:

Supply air to the trailer.

Chock the wheels.

Inspect the fifth wheel.

Connect the electrical cord.

Correctly following the steps to couple and uncouple trailers is vital to safely operating a combination vehicle. After connecting the air lines to the trailer while coupling, you should supply air to the trailer.

5 . When entering or crossing traffic while driving a combination vehicle, it is especially important that you:

Sound your horn.

Make sure there is a large enough gap for your vehicle.

Expect other drivers to make room for your vehicle.

Let other drivers wave you into their lane.

Combination vehicles require more space on the road than other vehicles. When entering or crossing traffic while driving a combination vehicle, it is especially important that there is a large enough gap in traffic for you to safely do so.

6 . What does an Anti-Lock Braking System (ABS) do?

It allows a vehicle's wheels to lock up.

It prevents a vehicle's wheels from locking up.

It makes turning a vehicle easier.

An Anti-Lock Braking System (ABS) helps prevent wheel lockup during hard braking. If ABS detects impending lockup, it reduces braking pressure to a safe level.

7 . In an empty combination vehicle, the stiff suspension springs and strong brakes will have:

High traction.

Low traction.

No traction.

An empty combination vehicle will come to a complete stop more slowly than a fully-loaded vehicle. With less weight in a trailer, the stiff suspension springs and strong brakes will have lower traction than they would if the vehicle carried more weight.

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2026 New Hampshire | Frequently Asked Questions

To secure a CDL Doubles/Triples endorsement in New Hampshire, you must already possess a valid CDL. You'll need to pass a written knowledge test specific to doubles/triples operation. Studying the New Hampshire CDL Handbook's section on doubles/triples is recommended. Once you've passed the test, the endorsement will be added to your CDL.

To obtain a CDL Doubles/Triples license, you firstly need to have a valid commercial driver's license (CDL). Next, you will need to pass a knowledge test specific to operating doubles/triples. This test covers topics such as coupling and uncoupling, inspecting doubles and triples, and the proper procedures for pulling double/triple trailers.

While no specific experience is mandated by law for a CDL Doubles/Triples endorsement, it's crucial you're proficient in operating a commercial vehicle. The endorsement requires passing a written knowledge test on handling such vehicles. Training, though not compulsory, can be beneficial for understanding vehicle handling, coupling/uncoupling, and inspection procedures.

Yes, to get a CDL Doubles/Triples endorsement, you must pass a specific written knowledge test. The test covers areas such as coupling and uncoupling, inspecting doubles and triples, and the correct procedures for pulling double/triple trailers. The endorsement does not require a separate skills test.

Actually, for a CDL Doubles/Triples endorsement, you won't need to demonstrate any specific skills or maneuvers in a road test. The endorsement requires only a written knowledge test. This test focuses on areas like coupling and uncoupling, inspecting doubles and triples, and proper procedures for pulling double/triple trailers.

No, it is not permissible. To legally operate double or triple trailers in New Hampshire, you must have a valid Commercial Driver's License (CDL) with a Doubles/Triples endorsement. Operating such vehicles without the proper endorsement can lead to legal penalties, including fines and potential loss of your CDL.

You can add the CDL Doubles/Triples endorsement to your existing CDL. You'll need to pass the Doubles/Triples knowledge test. Once you pass, the endorsement will be added to your CDL. It's not necessary to initiate a completely new application for a CDL unless your current one is not valid.

Yes, there are limitations for drivers with a CDL Doubles/Triples endorsement. One major constraint is that they can only drive double and triple trailers on highways and interstates. They are generally not allowed to drive these large vehicles in residential areas. Also, specific rules about weight and length of the trailers must be adhered to, as per federal and state regulations.

In New Hampshire, the maximum weight for a vehicle with a double/triple trailer is 80,000 pounds. The maximum length of a trailer is 53 feet. However, the combined length of the truck and double trailers cannot exceed 75 feet. For triples, the total length should not exceed 65 feet. It's important to check federal regulations as well, as they may have additional restrictions.

Yes, drivers with a CDL Doubles/Triples endorsement must follow specific safety guidelines. These include checking all connections regularly, maintaining safe following distances, and taking extra care when turning or changing lanes due to the increased length of the vehicle. Additionally, drivers must be aware of the "crack-the-whip" effect that can happen when driving at high speeds or making sudden lane changes.