Which configuration powers the Mast and Support Arms?

• A. Manual operation only.
• B. Hydraulic lines only.
• C. Powered by batteries, motors, and logic functions.
• D. Solar cells.

Answer: (C)

The Mast and Support Arms are an active part of the escalator’s system, not just a passive structure. They rely on electrical power to drive actuators, sensors, and control logic that position and safe-guard the handrail and balustrade assembly. That means a combination of motors and actuators powered by the electrical supply, with logic circuits (controllers, interlocks, sensors) coordinating their operation. Battery backup is often included so the system can still operate or brake safely in an outage, which is why batteries, motors, and logic functions together describe the powering configuration.

Ruling out the other options: relying on manual operation only would leave no automatic control or safety interlocks, hydraulic lines alone would imply a different actuation method without electronic control, and solar cells aren’t used to power escalator components in typical installations.