Combination Vehicles Practice Test | Montana 2025 #1 Page 2 of 3
Train for FREE online with our Montana 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 MT 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.
8 . Using the trailer hand brake while experiencing a trailer jackknife will:
If you are experiencing a trailer jackknife, you can help your tires regain traction by releasing the brakes. Using a trailer hand brake while experiencing a skid will only cause the skid to continue.
9 . During a trip, which shut-off valves should be open?
When starting a trip, be sure that all shut-off valves are in the open position, except for the last valves on the rear trailer. It is important that air reaches the brakes on all trailers and that the air is not able to escape from the back of the vehicle.
10 . ____ are the cause of more than half of all accident-related truck driver deaths.
More than half of all accident-related truck driver deaths are a result of truck rollovers. To help prevent a rollover, be sure to load cargo low to the ground and centered on your rig. Take corners slowly and carefully.
11 . What does the trailer air supply control look like?
On newer vehicles, the trailer air supply control is an eight-sided red knob. It's used to control the tractor protection valve.
12 . If your vehicle gets stuck on railroad tracks, you should:
If your vehicle gets stuck on railroad tracks for any reason, you should immediately exit the vehicle and walk away from the tracks. Contact the proper emergency authorities.
13 . Air pressure in the ____ air line is controlled by either the foot brake or trailer hand brake.
Air pressure in the service air line is controlled by either the foot brake or trailer hand brake. The service air line is also known as the control line or signal line. This line is connected to relay valves, which allow the trailer brakes to be applied more quickly than would otherwise be possible.
14 . Bobtail tractors are ____ to stop than tractors attached to full semitrailers.
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 come to a complete stop than a tractor attached to a loaded semitrailer.
See the exact questions that will be on the 2025 Montana DMV exam.
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