Question

Ventilators are provided at the top of the room

• A. To bring oxygen for breathing
• B. So that sunlight may enter the room
• C. To maintain convectional currents to keep the air fresh in the room
• D. To provide an outlet for carbon dioxide

Answer 1

The correct option is C

To maintain convectional currents to keep the air fresh in the room

The explanation for correct option:

1. Maintaining convectional currents to keep the air in the room fresh
2. In a room with a mix of hot and cold air, hot air rises because it is less dense, while cold air sinks.
3. This happens due to air convection. If there are human bodies inside the room, they will emit body heat into the air, and if there isn't a source of cold air, the room will eventually heat up.
4. As a result, ventilators are installed at the ceiling to maintain convection currents and keep the air in the room fresh and cool.

Hence,Option(C) is correct.