Question

1. 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
​

Answer 1

Explanation:

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.