Combination #1
Combination Vehicles Practice Test | Montana 2026 #1 Page 3 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 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 for issuing a combination license may vary from state to state.
20
16
20
15 . If the emergency air line loses pressure:
The tractor protection valve keeps air in the trailer's braking system should the trailer break away or develop a leak. A loss of air pressure in the emergency line will cause the tractor protection valve to open and the emergency trailer brakes to activate.
16 . To prevent a rollover, a driver should:
Turn quickly.
Rollovers can happen when a combination vehicle is turned too quickly. To help prevent the risk of rollover, it is important to keep the vehicle's center of gravity low by loading cargo as close to the ground as possible.
17 . When uncoupling a trailer, landing gear should be:
Firmly on the ground.
Landing gear, or trailer supports, should always be completely raised before a vehicle is driven. When uncoupling, landing gear should be lowered to make firm contact with the ground. If a trailer is loaded when it is being uncoupled, you should lower the landing gear and turn the crank a few additional times to remove some weight from the trailer.
18 . What is off-tracking?
When a vehicle's wheels run over a curb during a turn
When a vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is known as off-tracking, or "cheating."
19 . Compared to other commercial motor vehicles, combination vehicles need more space on the road because they are longer and they:
Swerve more often.
Combination vehicles need more space on the road than other commercial vehicles because they are longer and need more space to turn and stop. It is especially important to properly manage space when you are operating a combination vehicle.
20 . If you use the trailer hand brake while your trailer is skidding, it 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.
2026 Montana | Frequently Asked Questions
In Montana, to secure a CDL Doubles/Triples endorsement, you must first hold a valid Commercial Driver's License (CDL). Then, you need to pass the Doubles/Triples Knowledge written test. After passing the test, pay the necessary fees at your local Montana Motor Vehicle Division office to have the endorsement added to your CDL.
To obtain a CDL Doubles/Triples endorsement, you must hold a valid Commercial Driver's License (CDL). You will then need to pass the Doubles/Triples Knowledge written test. Some states may require additional training or experience. Check with your local Department of Motor Vehicles for specific requirements in your state.
While you must have a valid Commercial Driver's License (CDL) to get a Doubles/Triples endorsement, Montana doesn't explicitly require specialized training or experience. However, it's recommended to undergo training for safety and proficiency. Keep in mind, you must pass the Doubles/Triples Knowledge Test to get the endorsement.
Yes, in Montana, to obtain a CDL Doubles/Triples endorsement, you are required to pass a specialized knowledge test. This test is designed to assess your understanding of safety protocols, operational procedures, and regulations associated with driving double and triple trailers. It's separate from the general CDL written exam.
The CDL Doubles/Triples endorsement test in Montana is a written knowledge test, not a skills test. It focuses on specific rules and safety guidelines related to hauling double and triple trailers. Topics include coupling and uncoupling, inspecting doubles and triples, and handling these large vehicles on the road. Practical skills or maneuvers are not directly tested for this endorsement.
No, it is not permissible. In Montana, as in all U.S. states, you must have a valid CDL with a Doubles/Triples endorsement to legally operate double or triple trailers. Driving such vehicles without the appropriate license and endorsement can result in hefty fines, license suspension, and potential legal consequences.
Yes, you can add the Doubles/Triples endorsement to your current CDL. You don't need to initiate a new license application. However, you will need to pass the Doubles/Triples endorsement knowledge test, and pay an additional fee. Once you pass, the endorsement will be added to your existing CDL.
Yes, there are limitations. A CDL Doubles/Triples endorsement allows you to operate vehicles with more than one trailer, but it doesn't permit you to drive all types of commercial vehicles. For instance, you would need additional endorsements to drive a school bus or a vehicle carrying hazardous materials. Furthermore, all CDL rules regarding medical fitness, hours of service, etc., still apply.
In Montana, the maximum weight for a vehicle (or combination) with a load is 131,060 pounds. The maximum length for a single trailer is 53 feet, and for double/triple trailers, the combined length should not exceed 75 feet. However, these limits can be subject to exceptions based on specific routes or permit conditions. Always check local regulations.
Yes, there are specific safety guidelines. Drivers must ensure the coupling devices are secure, maintain a safe following distance, and avoid sudden lane changes or hard braking. Also, they must be aware of the "crack-the-whip" effect, which can cause the last trailer to overturn at high speeds or sharp turns. Regular vehicle inspections and adhering to federal and state regulations are also required.