Which device disables chairlift when the seat is unlocked?

• A. Slack Cable Safety Device
• B. Seat Belt Functionality
• C. Tilt Seat
• D. Swivel Seat Cut-off Switch

Answer: (C)

The safety mechanism here is tied to whether the seat is in its locked position. The tilt seat device is wired to detect if the seat can tilt or is not properly locked in place. If the seat is unlocked and allowed to tilt, the tilt-seat interlock opens the circuit and disables the chairlift, preventing movement until the seat is securely locked again. This protects riders from being carried on a seat that isn’t secured.

The other devices serve different purposes: the Slack Cable Safety Device responds to cable tension and stops the lift if there’s too much slack; Seat Belt Functionality focuses on restraining the rider but doesn’t disable operation due to the seat being unlocked; and Swivel Seat Cut-off Switch prevents the lift from running if the seat is swiveled, but it isn’t specifically the mechanism that detects an unlocked seat.