What distinguishes an 'A Train' from a 'C Train'?

• A. An A Train has an additional articulation point
• B. An A Train has a self-steering axle, but a C train does not
• C. A C Train has only one pintle hitch but an A Train has two
• D. A C Train does not use an independent converter, but am A Train does

Answer: (A)

The main idea is how many hinges or pivot points the vehicle combination has. An A Train uses a converter dolly to connect a second trailer, which creates an extra articulation point between the first and second trailers. That additional hinge is what distinguishes it from a C Train. More articulation points mean the rig can pivot in more places, changing how you steer and how it maneuvers. Other features like self-steering axles or the exact number of pintle hitches aren’t universal, so they don’t reliably separate A Trains from C Trains.