Which device prevents the stairlift from overspeeding and is activated by incline?

• A. Overspeed Governor
• B. Tripping Point
• C. Vertical Speed
• D. Horizontal Speed

Answer: (A)

The device being tested is a safety control that keeps the stairlift from running too fast when it’s moving along the track, especially on an incline. An overspeed governor is designed to monitor the drive speed and, if it detects that the chair would exceed the safe limit, it quickly engages the braking system or otherwise retards the drive to hold or reduce speed. This is crucial on an incline because gravity can cause the chair to accelerate, so the governor acts as a safeguard to prevent dangerous speeds.

A tripping point is a different kind of safety mechanism that triggers under another condition, not directly tied to speed control. Terms like vertical speed or horizontal speed aren’t specific devices used to control stairlift motion. So the overspeed governor best fits the function described.