Combination #1
Combination Vehicles Practice Test | Maine 2026 #1 Page 2 of 3
Train for FREE online with our Maine 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 ME 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.
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8 . Trailers built before ____ are not required to have spring brakes.
Trailers built before 1975 are not required to have spring brakes. When parking a trailer without spring brakes, be sure to use wheel chocks to prevent the trailer from rolling.
9 . Before beginning a trip, you should:
Before a trip, you should ensure that air reaches all air brakes on all trailers by opening up the rear emergency line and service line shut-off valves and listening for escaping air. Close both shut-off valves before beginning to drive.
10 . During a trip, the ____ 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 it is not able to escape from the back of the vehicle.
11 . If an air supply control is in its "emergency" position:
Tractor protection controls in older vehicles may be operated by levers instead of knobs. If an air supply control is set in its "emergency" position, the air supply will be stopped and the trailer emergency brakes will be applied.
12 . After completing a pre-trip inspection, you should ensure that the:
Before a trip, you should ensure that air reaches all air brakes on all trailers by opening up the rear emergency line and service line shut-off valves and listening for escaping air. Close both shut-off valves before beginning to drive.
13 . The best way to recognize that your trailer has started to skid is by:
The easiest way to become aware that your trailer has begun to jackknife is to observe it in your mirrors. Checking your trailer in your mirrors will also allow you to spot any skidding at the earliest possible moment.
14 . The "crack-the-whip" effect can:
Trailers can overturn as a result of the "crack-the-whip" effect. The last trailer in a combination is the most prone to tip over due to this effect. Drivers should be aware of the rearward amplification of their specific vehicles and drive accordingly.
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2026 Maine | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in Maine, you must possess a valid Maine CDL. Then, pass the Doubles/Triples Knowledge test. This test covers the information found in the Maine Commercial Driver License Manual's section on Doubles/Triples. After passing the knowledge test, you'll receive your endorsement which allows you to drive vehicles with more than one trailer.
To obtain a CDL Doubles/Triples license, you must first have a Commercial Driver's License (CDL). Next, you need to pass the Doubles/Triples Knowledge Test, which covers handling, inspecting, and driving double/triple trailers. Study materials can be found in the CDL manual. After passing the test, the Doubles/Triples endorsement is added to your CDL.
While specialized experience or training isn't explicitly required for a CDL Doubles/Triples endorsement, it's beneficial to have a good understanding of handling and driving large vehicles. Studying the CDL manual, specifically the section on Doubles/Triples, is crucial. Passing the Doubles/Triples Knowledge Test is mandatory to receive the endorsement.
Yes, to obtain the CDL Doubles/Triples endorsement, you must pass the Doubles/Triples Knowledge Test. This test covers topics such as coupling and uncoupling, inspecting doubles and triples, and handling and driving double and triple trailers. The information required for this test can be found in your state's CDL manual.
The CDL Doubles/Triples endorsement test is a written knowledge test, not a skills test. Therefore, you won't need to showcase any specific maneuvers. However, you should have knowledge about coupling and uncoupling, inspecting doubles and triples, and the proper procedures for handling and driving double and triple trailers.
No, it is not permissible to operate double or triple trailers without a valid CDL Doubles/Triples endorsement in Maine. This endorsement is necessary to ensure that drivers have the knowledge and skills to safely operate these types of vehicles. Operating without the appropriate license or endorsement can result in fines and penalties.
You can add the CDL Doubles/Triples endorsement to your existing commercial driver's license. You don't need to initiate a new application for a different license. However, you will have to pass the Doubles/Triples knowledge test and pay an endorsement fee to add it to your current CDL.
Yes, there are limitations for drivers with a CDL Doubles/Triples endorsement. Drivers must adhere to the maximum allowable weight for double and triple trailers. They also cannot drive these trailers on all roads, as some are restricted. Additionally, drivers must follow all federal and state regulations regarding rest periods and hours of service.
In Maine, the maximum legal weight for a vehicle is 80,000 pounds. However, the exact weight for double/triple trailers can depend on axle spacing. As for length, the maximum limit is 75 feet for doubles and 100 feet for triples. These limits may vary depending on the type of roads or highways used. Always check local regulations before driving.
Yes, drivers with a CDL Doubles/Triples endorsement must follow specific safety regulations. They must ensure proper coupling and uncoupling of trailers, maintain safe following distances, and manage high-speed and curve handling. They're also required to perform routine vehicle inspections, secure cargo appropriately, and adhere to weight restrictions. Additionally, drivers must comply with all federal and state hours-of-service regulations.
