Which device stops the chairlift if an obstruction is encountered?

• A. Slack Cable Safety Device
• B. Traveling Cable Tracking
• C. Obstruction Device
• D. Power Seat

Answer: (C)

When a chairlift encounters something blocking its path, a dedicated safety device is designed to sense that obstruction and stop the drive immediately. This Obstruction Device is specifically tuned to trigger a shutdown whenever a passenger or object blocks the track or chair, preventing contact and injury. It provides a direct, rapid response to blockages, independent of operator actions, and prompts an alarm and fault indication for inspection after stopping.

Other devices have different roles: the Slack Cable Safety Device monitors the tension of the haul rope and will stop if the rope becomes slack, signaling potential abnormal motion or load conditions; Traveling Cable Tracking watches the alignment of the traveling cable and stops to prevent damage if tracking is lost; Power Seat is a seating feature related to rider comfort or accessibility, not a blockage-detection safety.