Combination Vehicles Practice Test | North Dakota 2025 #2

Train for FREE online with our North Dakota 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 ND 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 20

Passing Score 16

Number of Tests 20

1 . An air supply control in its "emergency" position will:

Turn on the air supply.

Apply the trailer emergency brakes.

Prevent a skid.

Accelerate the vehicle.

Tractor protection controls in older vehicles may be operated by levers instead of knobs. If an air supply control is set in its "emergency" position, the air supply will be stopped and the trailer emergency brakes will be applied.

2 . A combination vehicle has:

One air line.

Two air lines.

Three air lines.

Four air lines.

Combination vehicles have two air lines: a service line and an emergency line.

3 . Fully-loaded rigs:

Are less likely to roll over than empty rigs.

Are more likely to roll over than empty rigs.

Are just as likely to roll over as empty rigs.

Should not be driven.

Because the weight of cargo gives them a higher center of gravity, fully-loaded rigs are 10 times more likely to roll over in a crash than empty rigs.

4 . When driving a trailer with ABS, you should:

Not depress the brakes as much as you would when driving a vehicle without ABS.

Use extra braking force to ensure the ABS kicks in.

Brake as you would when driving a vehicle without ABS.

Try to not brakes as often as you would when driving a vehicle without ABS.

When driving a tractor-trailer combination equipped with an Anti-Lock Braking System (ABS), you should brake in the same manner that you would if operating a vehicle without ABS.

5 . Using the trailer hand brake while experiencing a trailer jackknife will:

Stop the skid.

Straighten the trailer.

Increase traction.

Continue the skid.

If you are experiencing a trailer jackknife, you can help your tires regain traction by releasing the brakes. Using a trailer hand brake while experiencing a skid will only cause the skid to continue.

6 . When coupling a trailer:

Make sure to couple matching glad hands.

Any glad hand can be connected to any other glad hand.

It is best to leave one glad hand unattached.

Only one set of glad hands should be connected.

When coupling, make sure you couple matching glad hands. They are often color-coded to help drivers avoid mistakes. Typically, blue is used for service lines and red is used for emergency lines.

7 . 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.

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2025 North Dakota | Frequently Asked Questions

To secure a CDL Bus endorsement in North Dakota, you must first hold a valid Commercial Driver's License (CDL). Then, you need to pass a Passenger Vehicles endorsement test which includes topics like vehicle inspection, loading and trip start, on the road driving, after-trip vehicle inspection and prohibited practices. Lastly, you must pass a skills test in a passenger vehicle.

To obtain a CDL Bus license in North Dakota, you must be at least 18 years old, possess a valid driver's license, and pass a vision test. You'll also need to pass a general knowledge test, a passenger transport test, and a skills test that includes pre-trip vehicle inspection, basic vehicle control, and on-road driving. Additionally, you must pass a medical examination.

In North Dakota, specific training for a CDL Bus endorsement is not mandated by law, but it's highly recommended. This training typically covers vehicle inspection, safe operation practices, and emergency procedures. Also, many employers require some experience driving similar vehicles. Practical experience is necessary to pass the skills test, which includes pre-trip inspection, basic vehicle control, and on-road driving.

CDL Bus licenses fall under Class B or Class C. Class B is for vehicles designed to transport 24 passengers or more, including the driver. Class C is for vehicles designed to carry 16 to 23 passengers, including the driver. Each class requires different tests and endorsements. For instance, a School Bus (S) endorsement is needed to drive a school bus, while a Passenger (P) endorsement is needed for transporting passengers.

No, you cannot use your personal vehicle for the CDL Bus driving test in North Dakota. The vehicle you use for the test should represent the type of vehicle you plan to drive once you receive your CDL. Therefore, it should be a commercial bus similar to the one you'll be operating.

During the CDL Bus driving test in North Dakota, the examiner will evaluate skills such as pre-trip vehicle inspection, basic vehicle control, and on-road driving. You may be asked to perform maneuvers like backing up, making sharp turns, stopping at controlled intersections, merging into traffic, and navigating through railroad crossings.

Yes, there are additional medical prerequisites for a CDL Bus endorsement. Applicants must pass a Department of Transportation (DOT) physical examination every 24 months. The examination evaluates vision, hearing, blood pressure, and checks for diabetes and other potential health conditions. The results are reported on a Medical Examination Report Form, which must be submitted to the North Dakota Department of Transportation.

No, it's not permissible. In North Dakota, driving a commercial vehicle designed to transport 16 or more passengers, including the driver, without a valid Commercial Driver's License (CDL) with a passenger (P) endorsement is illegal. Violating this can result in serious penalties including fines and suspension of your driving privileges.

Yes, the CDL Bus endorsement can be added to your existing CDL in North Dakota. You will need to pass the Passenger Transport Test and a skills test in a passenger vehicle. However, you don't need to apply for a new CDL. Remember to bring your current CDL and the appropriate fee when you go for your test.

Yes, there are restrictions for drivers with a CDL Bus endorsement in North Dakota. Drivers must not have more than one license, must be at least 21 years old for interstate driving, and must pass a physical examination every 24 months. Additionally, drivers are required to obey all traffic laws and regulations and maintain a clean driving record.