In newer vehicles with air brakes, the parking brake is controlled by a yellow, diamond-shaped knob. The driver should pull the knob outward to apply the parking brakes and push the knob inward to release them.

Pulling a yellow, diamond-shaped knob.

Pushing a yellow, diamond-shaped knob.

Pulling a yellow, diamond-shaped knob.

When performing a visual check of coupling devices, you should make sure there is no space between the upper and lower fifth wheel. Ensure that the locking jaws are securely closed around the kingpin.

Make sure there is no space between the upper and lower fifth wheel.

Make sure the kingpin is polished.

Look for mud on the fifth wheel.

When driving through work zones, you should make a particular point of reducing your speed when workers are on or near the road.

Wait until the construction is complete before proceeding.

Rollovers happen when a vehicle is driven too fast. To reduce the risk of rollover, make sure the weight of cargo is loaded low to the ground, and that you take turns and curves slowly.

A truck driver is driving too fast.

The driver of a vehicle in front of a truck is moving to slowly.

A truck driver is driving too slowly.

Mirrors should be checked prior to the beginning of a trip. On a vehicle with a trailer, mirror adjustment can only be checked accurately if the connected trailer is straight.

When the trailers are straight.

When you are standing next to the vehicle.

Air brakes consists of three separate braking systems: the service brake system, the parking brake system, and the emergency brake system. The service brake system applies and releases the brakes when you use the brake pedal while driving normally.

Applies and releases the brakes when you press the brake pedal while driving normally.

Applies and releases the parking brakes.

Applies and releases the emergency brake.

Applies and releases the axle brake.

If a tractor-trailer is so equipped, the trailer brake hand valve can be used to stop the vehicle from rolling back when being started from a stop.

Prevent the vehicle from rolling back when being started from a stop.

Double Triple Test | Montana 2026 #1 Page 2 of 3

Train for FREE with our Montana CDL double triple practice test online. 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 MT CDL double triple license in 2026, 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 may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

Double Triple Test | Montana 2026 #1 Page 2 of 3

8 . The parking brake in a newer vehicle is applied by:

9 . When making a visual check of a coupling, you should:

10 . When nearing a construction worker who is close to the road, you should:

11 . Rollovers happen when:

12 . Mirrors should be adjusted:

13 . The service brake system:

14 . If a truck is equipped, a trailer brake hand valve can be used to:

See the exact questions that will be on the 2026 DMV exam.

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