Which safety function is activated by a governor or suspension malfunctions?

• A. Safety Mechanism
• B. Capacity Plate
• C. Obstruction Devices
• D. Closing Speed

Answer: (A)

The test is about what automatically protects the escalator when the speed monitor (governor) or the suspension system fails. When the governor detects overspeed or a problem with the suspension, the safety mechanism is triggered. This safety mechanism engages a brake to stop the steps quickly, preventing the escalator from running away or losing control. It’s the dedicated safety response to those specific malfunctions, built to bring the machine to a controlled halt.

The other options aren’t the direct safety response to governor or suspension problems. A capacity plate is just a rating label and doesn’t actuate any protection. Obstruction devices react to something blocking the path, not to a failure in speed sensing or suspension. Closing speed refers to how fast doors or related parts move, not to the automatic stopping function prompted by governor or suspension issues.