Which roof-mounted device is used to collect power from overhead lines?

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Multiple Choice

Which roof-mounted device is used to collect power from overhead lines?

Explanation:
Pantograph is the roof-mounted device that collects power from overhead lines. It is a spring- or hydraulically-loaded arm with a contact surface that presses against the overhead conductor (the catenary wire) as the vehicle moves. This setup maintains a continuous electrical connection and feeds power into the traction system while allowing the roof equipment to move with changes in height, tension, and track geometry. The other terms don't describe the standard current-collection device used on trains: they aren’t the name for the roof-mounted contact method that interfaces with overhead lines.

Pantograph is the roof-mounted device that collects power from overhead lines. It is a spring- or hydraulically-loaded arm with a contact surface that presses against the overhead conductor (the catenary wire) as the vehicle moves. This setup maintains a continuous electrical connection and feeds power into the traction system while allowing the roof equipment to move with changes in height, tension, and track geometry. The other terms don't describe the standard current-collection device used on trains: they aren’t the name for the roof-mounted contact method that interfaces with overhead lines.

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