Combination Vehicles Practice Test | Minnesota 2025 #2

Train for FREE online with our Minnesota 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 MN 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 . When coupling:

You can assume all vehicles are the same.

Be sure that you are coupling correctly.

Cracks in the mounting are acceptable.

Incorrect coupling and uncoupling of combination vehicles can have extremely dangerous consequences.

2 . Before backing your tractor under the trailer, make sure your trailer brakes are:

Disengaged.

Locked.

Deactivated.

Dry.

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.

3 . The trailer hand valve should:

Be used for parking.

Be used only to test the trailer brakes.

Be used together with the brake pedal.

Be used on slippery surfaces.

The trailer hand valve works the trailer brakes but should only be used when testing them. Using it while driving could create a skid. Never use the trailer hand valve while parking because doing so may release the air pressure from the braking system, releasing the brakes that are holding the vehicle in place.

4 . When driving a bobtail tractor, you should be aware that:

Bobtails stop very easily.

Bobtails cannot drive as fast as tractors with semitrailers.

Bobtails are more difficult to stop than tractors with semitrailers.

Bobtails are illegal in most states.

Bobtail tractors are tractors that are not attached to any semitrailers. When operating a bobtail, you should be aware that stopping can be difficult and that it will take a longer distance to bring the bobtail to a complete stop than it would a tractor attached to a loaded semitrailer.

5 . Rollovers happen when drivers:

Turn too quickly.

Do not driving fast enough.

Pay attention to the road.

Drive illegally.

A rollover happens as a result of a driver taking a turn at too high a speed. Be sure to take turns and curves safely and slowly.

6 . 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.

7 . Making a quick lane change while pulling multiple trailers is usually safer than making a quick lane change while pulling only one trailer.

True

False

Double and triple combinations are less stable than single commercial vehicles. They are more likely to roll over when being driven with quick movements. Doubles and triples must be driven very smoothly and gently.

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2025 Minnesota | Frequently Asked Questions

To acquire a CDL Tank endorsement in Minnesota, you must first possess a valid Commercial Driver's License (CDL). Then, study the Minnesota CDL handbook's tank vehicle section. Afterward, schedule and pass a Tank Vehicle written test at your local Department of Motor Vehicles (DMV). Successful completion of the test will add the endorsement to your CDL.

Obtaining a CDL Tank license requires a valid Commercial Driver's License (CDL). You must study the tank vehicle section of the CDL handbook thoroughly. After understanding the material, schedule and pass a Tank Vehicle written test at your local DMV. Once you pass the test, the tank endorsement will be added to your CDL.

While specific training or experience isn't mandatory for a CDL Tank endorsement, it's highly beneficial. Understanding the material in the tank vehicle section of the CDL handbook is crucial. Passing the Tank Vehicle written test at your local DMV is required. Practical experience or training can help you better understand the rules and operations, increasing your chances of passing the test.

Yes, to obtain a CDL Tank endorsement in Minnesota, applicants must pass a specific written knowledge test. This test focuses on the safe transportation of liquid and gaseous materials. It's administered by the Minnesota Department of Public Safety and is in addition to the general CDL requirements.

The written test for a CDL Tank endorsement covers a variety of topics, including the inspection of tank vehicles, correct loading and unloading procedures, driving stability and handling, and the correct response to emergencies or hazardous conditions. It's key to study these areas thoroughly to pass the test and obtain your endorsement.

The CDL Tank endorsement assessment doesn't typically involve a skills or driving test. It focuses on the written exam which tests knowledge on specific topics like inspecting tank vehicles, understanding weight distribution, handling high center of gravity, and dealing with surge. However, general CDL testing will assess your ability to safely operate and maneuver the vehicle.

Yes, there are certain limitations for drivers with a CDL Tank endorsement. For example, they are only allowed to operate vehicles that carry liquid or gaseous materials in a tank or tanks having an individual rated capacity of more than 119 gallons and an aggregate rated capacity of 1,000 gallons or more. They must also adhere to strict safety and operational regulations.

No, liquid or gas materials cannot be transported without a valid CDL Tank endorsement. If a driver is caught transporting these materials without the proper endorsement, they could face serious penalties such as fines, suspension of their CDL, or even jail time. This endorsement is crucial for safety and regulatory compliance.

To add the CDL Tank endorsement to your current license in Minnesota, you will need to complete a fresh application. You must pass the written knowledge test specific to the Tank endorsement and provide the necessary documentation. Additionally, you may need to pass a skills test depending on the type of tank vehicle you will be operating.

Yes, handling hazardous materials with a CDL Tank endorsement requires additional training and certification, known as a Hazmat endorsement. This ensures drivers are knowledgeable about the risks and safety procedures associated with transporting hazardous materials. Additionally, a federal background check is required to obtain a Hazmat endorsement.