Safety, Fire & Survival · Fire — Detection
A smoke detector that works by sensing the reduction of light reaching a sensor as smoke enters is an:
- AIonization detector
- BRate-of-rise heat detector
- COptical (photoelectric) smoke detector✓ Correct
- DFlame (infrared) detector
Explanation
An optical/photoelectric detector senses light scattered or obscured by smoke particles. Ionization detectors sense charged-particle changes; heat detectors respond to temperature or its rate of rise; flame detectors sense radiation.
Authority: SOLAS Chapter II-2; FSS Code (fire detection)
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