Combination Vehicles Practice Test | North Carolina 2025 #2

Train for FREE online with our North Carolina 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 NC combination 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 DMV requirements for issuing a combination license may vary from state to state.

Number of Question 25

Passing Score 20

Number of Tests 20

1 . If the trailer begins to skid, it is best to:

Release the brakes.

Accelerate.

Quickly turn the steering wheel one way, then the other.

Brake.

If your trailer begins to skid, you should release the brakes to help regain traction. Once the wheels grip the road again, the trailer will begin to straighten out and follow the path of the tractor.

2 . Using the trailer hand valve while driving:

Will help you turn safely.

Will stop your trailer safely.

Can cause a skid.

Is impossible.

Never use the trailer hand valve while operating your vehicle. Using the trailer hand valve while driving can cause your trailer to skid.

3 . Watching the road ahead:

Is more dangerous than only watching your mirrors.

Does not help you drive more safely.

Can help you avoid the need for sudden lane changes.

Making a sudden lane change can be dangerous while driving a combination vehicle. You can avoid the need to make a sudden lange change by looking down the road for upcoming obstacles that will require you to change lanes.

4 . If unsure if a trailer is equipped with ABS, you can:

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

Try driving on a slippery surface and see if ABS kicks in.

Assume it does have ABS.

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

Trailers and converter dollies built on or after March 1, 1998 are required to have Anti-Lock Braking Systems (ABS). This will be indicated by the presence of a yellow malfunction lamp. You can determine if older trailers have ABS by checking under the trailers for ECU and wheel speed sensor wires coming from the back of the brakes.

5 . 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.

6 . The service air line is attached to the:

Relay valves.

Supply line.

Emergency air line.

Steering wheel.

The service air line carries air and is controlled by either the foot brake or trailer hand brake. The service air line is attached to relay valves, which allow the trailer brakes to be applied quickly.

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2025 North Carolina | Frequently Asked Questions

To acquire a CDL Tank endorsement in North Carolina, you must first have a valid Commercial Driver's License (CDL). Next, prepare for the Tank endorsement test by studying the relevant section of the NC CDL manual. Schedule and pass the written test at your local DMV. Upon passing, your Tank endorsement will be added to your CDL.

To obtain a CDL Tank license in North Carolina, you must first have a valid Commercial Driver's License (CDL). Then, study the Tank Vehicles section of the NC CDL manual. Following this, you need to pass a written test at a local DMV. Once you pass the test, the Tank endorsement is added to your CDL.

While North Carolina does not specifically require training or experience for a CDL Tank endorsement, it's highly recommended. Studying the Tank Vehicles section of the NC CDL manual is crucial. Training can provide practical knowledge and improve your chances of passing the written test at your local DMV, which is required to obtain the endorsement.

Yes, in North Carolina, you must pass an additional written test to obtain a CDL Tank endorsement. This test covers specific knowledge related to the safe loading, transit, and unloading of liquid and gaseous tank cargo. The material for this test is found in the Tank Vehicles section of the NC CDL manual.

The written test for the CDL Tank endorsement in North Carolina covers topics like inspecting tank vehicles, understanding weight distribution, how to safely drive tanks, handling high center of gravity, managing surge, safe loading and unloading, and handling leaks. These topics are detailed in the Tank Vehicles section of the NC CDL manual.

The CDL Tank endorsement assessment in North Carolina is mainly a written test focused on knowledge rather than specific driving maneuvers. It evaluates your understanding of inspecting tank vehicles, safe driving practices, handling high center of gravity, managing surge, and responding to emergencies. However, during the general CDL road test, you'll demonstrate practical skills like vehicle control and maneuvering.

Yes, drivers with a CDL Tank endorsement in North Carolina must adhere to specific regulations. They can't exceed the weight limit for the vehicle, must follow safety protocols for loading and unloading, and must take precautions to prevent surge. Also, they must report any leaks immediately and comply with hazardous materials regulations if applicable.

No, in North Carolina, a valid Commercial Driver's License (CDL) with a Tank endorsement is required to transport liquid or gas materials. This endorsement ensures that the driver has the necessary skills and knowledge to handle such materials safely and in compliance with state and federal laws.

Yes, a CDL Tank endorsement can be added to your existing CDL. It does not require a fresh application for a new CDL. However, you will need to pass the Tank Vehicle written test. After passing, the endorsement will be added to your current CDL, allowing you to legally operate tank vehicles.

Yes, in North Carolina, handling hazardous materials with a CDL Tank endorsement requires additional training and certification known as the Hazmat endorsement. Drivers must pass a written test on federal and state regulations and undergo a TSA background check. This ensures they are equipped to handle hazardous materials safely and responsibly.