- Updated for March 2025
- Based on 2025 CT commercial driver's license manual
Free CT CDL Double/Triple Trailers Practice Test 2025
To be legally allowed to pull double or triple trailers in the United States, you must meet a set of requirements, including passing several knowledge tests. You must obtain a Class A CDL. To do this, you must pass the General Knowledge test, which all CDL applicants must pass. You must also pass the Combination knowledge test, which is required to obtain a Class A CDL to drive combination vehicles, such as semi-trucks and tractor-trailers. (You must also pass a skills test in such a vehicle.)
To drive combination vehicles with two or even three trailers or semi-trailers, you must also obtain a Double/Triple (T) endorsement on your Class A CDL. (However, triple trailers are prohibited in Connecticut.) To obtain 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, rollovers, and trailer sway. (However, no special skills test is required for this endorsement.)
All these knowledge tests are based on the official Connecticut CDL manual (Connecticut CDL Handbook 2025). You likely studied parts of this manual to get your CDL. We offer a set of tools to complement the official manual with intensive training. This is one of our tools: the first of five Connecticut Doubles and Triples Endorsement Practice Tests. This practice test is based on the official CDL manual, just like the official Double/Triple knowledge test. It’s up to date as of March 2025. The 20 multiple-choice practice questions and answers on this practice test address such topics as air lines, converter dollies, coupling, following distance, rearward amplification, and rollovers.
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 all the time you need to learn and master the material covered by this practice test. Not satisfied with your final score? You can retake this practice test as often as you wish. Each time, the order of the questions will be randomized.
Once you obtain your Double/Triple endorsement, you’ll be pleased to see how high the demand is for drivers with this qualification. Here are just two of the economic sectors using double trailers. In Connecticut as elsewhere, the logistics sector makes great use of double-trailer vehicles. LTL (Less-Than-Truckload) carriers and parcel delivery services use double trailers to transport goods efficiently between hubs. The retail sector also uses double trailers to transport products from distribution centers to stores and supermarkets.
- 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 CT 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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