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View All Plans- Updated for May 2025
- Based on 2025 ME commercial driver's license manual
Free ME CDL Double/Triple Trailers Practice Test 2025
To be legally allowed to pull double trailers in Maine (triples are not allowed), you must meet a set of requirements, including passing a series of tests. First, because these trucks are combination vehicles, you must obtain a Class A CDL. To do this, you must pass the General Knowledge and Combination knowledge tests. It’s wise to pass the Air Brakes knowledge test too, because virtually all heavy combination trucks are equipped with air brakes. Finally, you must pass a skills test in such a vehicle.
To drive double-trailer combination vehicles, you must also obtain a Double/Triple (T) endorsement on your Class A CDL. To get this endorsement, you must pass the Double/Triple knowledge test. This test covers such topics as safe handling, air brakes on doubles and triples, coupling and uncoupling, emergency situations, and state and federal regulations on doubles and triples. (However, no special skills test is required for this endorsement.)
This knowledge test is based on Chapter 7 (Doubles and Triples) of the official Maine CDL manual (Maine CDL Handbook 2025). We offer tools to complement the official manual with intensive training. This is one of our tools: the first of five Maine Doubles and Triples Endorsement Practice Tests. Like the Double/Triple knowledge test, this practice test is based on the official CDL manual. It’s up to date as of May 2025. The 20 multiple-choice practice questions and answers on this practice test address such topics as air lines, converter dollies, coupling, emergency situations, following distance, and rearward amplification.
Our AI Assistant can give you a hint if you get stuck on a question or an immediate explanation of the correct answer if you still miss the question. There’s no time limit; take as much time as you want. You can even take this practice test as an “open-book” test by keeping the CDL manual open for reference in another browser tab or separate window.
Demand for drivers qualified to pull doubles has been high. Carriers often prefer doubles for more efficient transport (i.e., more freight per trip). However, only a minority of truck drivers have this qualification. In Maine as elsewhere, the logistics sector makes heavy use of double trailers. Less-Than-Truckload (LTL) carriers and freight carriers use doubles for efficient transport of multiple shipments. The retail sector also makes frequent use of double trailers to transport bulk products to supermarkets, restaurants, and retail stores.
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Triple-checked for accuracy
What you need to know
What to expect on the actual ME DMV exam
questions
correct answers to pass
passing score
List of questions (classic view)
- When you're pulling more than one trailer, which trailer should be the first one behind the tractor?
- Which of these statements about quick steering movements and doubles/triples is true?
- You are driving a 100-foot double trailer combination at 50 mph. The road is dry and visibility is good. You should keep at least ____ seconds of space ahead of you.
- Before connecting a converter dolly to a second or third trailer, you should check the height of the trailer. The trailer height is right if
- You are driving a 100-foot double trailer combination at 30 mph. The road is dry and visibility is good. You should keep at least ____ seconds of space ahead of you.
- With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. When you do this, you should hear
- Empty trucks
- Which of these statements about handling doubles and triples is true?
- Before you can supply air to the air tanks of a second trailer, you need to
- You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking, you should
- How can you be sure that you supplied air to a second trailer?
- What is likely to happen if the pintle hook is unlocked while the dolly is still under the second trailer?
- You want to hook your combination to a second trailer that does not have spring brakes. To do this without wheel chocks, you should
- Which of these statements about managing space to the sides is true?
- The crack-the-whip effect that troubles trucks with trailers is most likely to tip over
- You are visually checking the coupling of a converter dolly to the rear trailer. How much space should there be between the upper and lower fifth wheel?
- You are pulling doubles. A set of trailer wheels goes into a skid. Which of the following is most likely to occur?
- You are doing a walk-around inspection of a double or triple trailer rig. You should be sure that the converter dolly air tank drain valves are ______ and the pintle hook is _______.
- A converter dolly is
- A converter dolly consists of a ______ wheel and ________ axles.
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