Questions tagged [smoke-detectors]

A smoke detector is a device that senses smoke, typically as an indicator of fire. Commercial and residential security devices issue a signal to a fire alarm control panel as part of a fire alarm system, while household detectors, known as smoke alarms, generally issue a local audible or visual alarm from the detector itself.

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How does the Boeing 747 smoke evacuation work?

(source, inset source) I recently watched Mayday's dramatization of UPS Airlines Flight 6. Then I recalled the Boeing 747 having a SMOKE EVAC handle. How does ...