You should always steer gently and smoothly while pulling a trailer. Making sudden steering moves could cause the trailer to tip over.

Make sudden turns with the steering wheel.

Push the accelerator to the floor when starting from a stop.

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.

Make sure to couple the proper glad hands.

Glad hands can be connected to any other glad hands.

Only one set of glad hands should be connected.

Driving combination vehicles requires more skill than driving single commercial vehicles. Combinations are generally longer, generally heavier, and are more vulnerable to rollover.

More difficult to drive than single commercial vehicles.

Easier to drive than single commercial vehicles.

Lighter than single commercial vehicles.

More difficult to drive than single commercial vehicles.

Driving combination vehicles requires more skill than driving single commercial vehicles. Combinations are generally longer, generally heavier, and are more vulnerable to rollover.

Usually require more skill to drive than single commercial vehicles.

Are usually shorter than single commercial vehicles.

Usually require less skill to drive than single commercial vehicles.

Usually require more skill to drive than single commercial vehicles.

Vehicles with trailers are vulnerable to rollover due to the "crack-the-whip" effect, which is caused by rearward amplification.

The cause of the "crack-the-whip" effect.

The amount of noise projected to the rear of a vehicle.

The cause of the "crack-the-whip" effect.

The number of trailers that can be pulled by a tractor.

When driving a tractor-trailer combination that is equipped with an Anti-Lock Braking System (ABS), you should brake in the same manner that you would if the vehicle was not equipped with ABS.

Brake as you would without anti-lock brakes.

Use extra braking force to ensure the brakes kick in.

Brake as you would without anti-lock brakes.

Combination Vehicles Practice Test | New Mexico 2025 #2 Page 2 of 3

Train for FREE online with our New Mexico 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 NM 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

Combination Vehicles Practice Test | New Mexico 2025 #2 Page 2 of 3

8 . When driving while pulling trailers, you should:

9 . Bobtail tractors are ____ to stop than tractors attached to full semitrailers.

10 . When coupling a trailer:

11 . Combination vehicles are usually:

12 . Combination vehicles:

13 . Rearward amplification refers to:

14 . When braking while pulling a trailer equipped with anti-lock brakes, you should:

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