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 secure a CDL Doubles/Triples endorsement in Minnesota, you must first possess a valid CDL. You then need to study the relevant section in the Minnesota Commercial Driver's Manual and pass the written knowledge test at a DVS exam station. The endorsement will be added to your CDL upon passing the test.

To obtain a CDL Doubles/Triples license, you must first hold a valid Commercial Driver's License (CDL). Then, study the relevant sections in your state's Commercial Driver's Manual. After studying, take and pass the Doubles/Triples endorsement knowledge test at your local DMV. This endorsement will be added to your CDL upon passing.

No specific experience or training is legally required to obtain a CDL Doubles/Triples endorsement. However, you need to have a valid CDL. You must study the relevant sections of your state's Commercial Driver's Manual and pass the written knowledge test. Practical experience or training driving such vehicles can be beneficial but is not mandatory.

Yes, to obtain a CDL Doubles/Triples endorsement, you are required to pass an additional written knowledge test. This test focuses on specific rules and safety regulations for driving double and triple trailers. The specific content of the test can be found in your state's Commercial Driver's Manual.

Actually, there is no specific skills test or road test required for the Doubles/Triples endorsement on your CDL. You only need to pass a written knowledge test. This focuses on understanding the handling and safety rules for double and triple trailers, such as coupling and uncoupling, inspecting doubles and triples, and checking air brakes.

No, it's not permissible. In Minnesota, like in all states, you must have a valid Commercial Driver's License (CDL) with a Doubles/Triples endorsement to legally operate double or triple trailers. Operating these vehicles without the proper endorsement can result in serious penalties, including fines and suspension of your driving privileges.

You can add the Doubles/Triples endorsement to your current commercial driver's license (CDL). You don't need to initiate a new application for a CDL. However, you will need to pass the Doubles/Triples written knowledge test and pay the required fees to add this endorsement to your existing CDL.

Yes, there are limitations. While a CDL Doubles/Triples endorsement allows you to drive vehicles with more than one trailer, it doesn't permit you to drive all types of commercial vehicles. For instance, if you want to drive a school bus or a tanker truck, you would need additional endorsements. Also, federal regulations limit the overall length of these vehicles.

In Minnesota, the maximum weight limit for double/triple trailers is 80,000 pounds. The maximum length for a double trailer is 81 feet 6 inches. For a triple trailer, the length should not exceed 100 feet. These limits can vary based on road and bridge laws, so always check local regulations.

Yes, there are specific safety guidelines. Drivers with a CDL Doubles/Triples endorsement must follow regulations regarding securement of cargo, regular vehicle inspections, and maintaining safe following distances. They must also be trained in coupling and uncoupling of units and be aware of the high rollover risk associated with these types of vehicles due to their length and weight.