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

Be sure that you are coupling correctly.

You can assume all vehicles are the same.

Be sure that you are coupling correctly.

Cracks in the mounting are acceptable.

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.

Be used only to test the trailer brakes.

Be used together with the brake pedal.

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.

Bobtails are more difficult to stop than tractors with semitrailers.

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.

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.

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.

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

Combination Vehicles Practice Test | Minnesota 2024 #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 2024, 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

Combination Vehicles Practice Test | Minnesota 2024 #2

1 . When coupling:

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

3 . The trailer hand valve should:

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

5 . Rollovers happen when drivers:

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

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

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