What transmission methods include rack and pinion or aircraft cable?

• A. Rack and Pinion
• B. Overspeed Safety Sensor
• C. Talcum Powder Application
• D. Power Transmission

Answer: (D)

The key idea is that rack and pinion and aircraft cable are ways to move or transmit mechanical power within the escalator system. Rack and pinion uses a gear (pinion) engaging a straight gear rack to convert rotational motion into linear motion, while aircraft cable (wire rope) with pulleys transmits drive by pulling components along a path. Both are methods of power transmission, delivering motion from the drive to the moving parts.

The other options aren’t about transmitting power: an overspeed safety sensor is a safety device, not a way to move parts; talcum powder application is a maintenance task related to friction, not transmission. So the best category that includes rack and pinion or aircraft cable is Power Transmission.