Building Automation Level II Practice Exam

What type of security system sensing device measures a weight load over a specific area?

Stress sensor Acoustic glass break detector Interface device Cross zoning

Correct Answer:

Stress sensor

Explanation:

Weight over an area is detected by sensing pressure distribution. A stress sensor is designed to measure mechanical stress caused by a load on a surface, converting that loaded area’s weight into an electrical signal. This makes it ideal for security devices like floor mats or pressure-sensitive pads that detect when someone or something steps onto a defined area. The other options don’t measure weight: an acoustic glass break detector listens for sounds of breaking glass, not pressure; an interface device is a general term for a signal connector or translator, not a weight-sensing element; cross zoning relates to how zones are defined and monitored rather than how a sensor detects weight.

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