Free MA CDL Double/Triple Trailers Practice Test 2025

Want to pull doubles in Massachusetts? (Massachusetts does not allow triple trailers.) You must hold a Class A CDL and obtain a Double/Triple (T) endorsement on your CDL. The limited number of drivers with this endorsement and their specialized skills and additional responsibilities place them in high demand.

In Massachusetts, as in much of the rest of the nation, the logistics and retail sectors make heavy use of double trailers for efficient transport. In intermodal shipping, double-trailer trucks transport containers and bulk goods between the state’s seaports, rail hubs, and distribution centers. Less-Than-Truckload (LTL) carriers, such as XPO Logistics, use doubles to transport cargo between warehouses and distribution hubs. Wholesale and retail distributors, such as BJ’s Wholesale Club Distribution Center and Stop & Shop Distribution Center, use double trailers to transport goods between warehouses and retail locations.

In Massachusetts, however, double-trailer trucks are heavily restricted in metropolitan areas, especially Boston. For example, when driving eastward toward Boston, you may only use I-90 from the New York state line to the I-95 interchange in Weston. You may not use any of the Boston tunnels.

To obtain the Double/Triple endorsement on your CDL, 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, pre-trip inspections, and state and federal regulations on doubles and triples. (No special skills test is required for this endorsement.)

This knowledge test is based on the official Massachusetts CDL manual (Massachusetts CDL Handbook 2025), especially Chapter 7: Doubles and Triples. We can help ensure you’ll pass the knowledge test on your first try – something you can’t ensure just by reading the manual.

This Massachusetts Doubles and Triples Endorsement Practice Test, the first of five we offer, is based on the official CDL manual, just like the official Double/Triple knowledge test. It’s up to date as of September 2025. The 20 multiple-choice practice questions and answers on this practice test deal with air lines, converter dollies, coupling, emergency situations, following distance, and rearward amplification.

Our AI Assistant can give you a hint or further elaboration if you get stuck on a question or an immediate explanation of the correct answer if you still miss the question. You can also ask it your own questions about driving.

This practice test isn’t timed; take all the time you want. Disappointed 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.