A fire alarm usually detects smoke in case of fire. Where should such an alarm be placed in a room?
on the ceiling
d) On the ceiling
In case of fire, the air on top of the fire becomes hotter and rises up. So, an alarm should be placed on the ceiling in a room. A fire alarm system warns people when smoke, fire, carbon monoxide or other fire-related emergencies are detected. Automatic fire alarm systems are activated through fire detectors, such as smoke or heat sensors.