United Standard Operating Procedures (SOP) Practice Test

On lavatory smoke detectors, what does the power indicator green light indicate?

The detector is not functioning The detector is in standby mode The detector is functioning The detector has detected smoke

Correct Answer:

The detector is functioning

Explanation:

The green power indicator shows the detector is powered and operating normally. When the unit is on and monitoring, the green light stays lit to confirm it’s ready to sense smoke and communicate with the system. It does not mean smoke is present. If the green light isn’t on, it signals a power or fault issue that needs checking. In contrast, an alarm state is typically indicated by a different light color, such as red.

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