Correct AnswerC. To activate the safety brake in case of overspeeding
Quick Explanation
The lift governor is an overspeed-sensing safety device. If car speed exceeds its permitted value, the governor trips the safety mechanism so the car's safety gear/brake can grip the guide rails and stop the lift.
Detailed Explanation
Concept & Reasoning
A traction lift has several separate control and safety subsystems. The drive controller regulates normal motion, door operators manage doors, and indicators show floor status. The governor is specifically part of the overspeed protection chain: it detects excessive speed mechanically/electrically and initiates safety-gear action independent of normal control.
How to Solve It in the Exam
Governor = speed safety, not normal speed command.
Important Exam PointIn lift questions, separate normal controller functions from fail-safe mechanical protection.
Related Revision Path
This question sits in the revision path Building Electrical Services → Vertical Transportation → Elevators .
