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A fire alarm usually detects smoke in ca...

A fire alarm usually detects smoke in case of fire. Where should such an alarm be placed in a room?

A

Near the door

B

On the floor

C

On any wall

D

On the ceiling

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Function of a Fire Alarm**: A fire alarm is designed to detect smoke and heat in the event of a fire. Its primary function is to alert occupants of a building to the presence of smoke, which is a sign of fire. 2. **Behavior of Smoke**: When a fire occurs, smoke rises due to its lower density compared to the surrounding air. This means that smoke will accumulate near the ceiling before it spreads throughout the room. 3. **Optimal Placement for Detection**: Given that smoke rises, the most effective place to install a fire alarm is at the highest point in the room. This allows the alarm to detect smoke as soon as it begins to accumulate. 4. **Conclusion**: Therefore, the best location for a fire alarm in a room is on the ceiling. This placement ensures that the alarm can quickly sense smoke and heat, providing an early warning in case of fire. **Final Answer**: A fire alarm should be placed on the ceiling of a room. ---
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