What are the utilities of ventilators present near the ceiling of a room?

They act as vents for cold air to enter the room.

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They can be used to store food grains and other things.

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They act as vents for hot air to pass out of the room.

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We use them to escape in case of an emergency.

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Solution

The correct options are
A They act as vents for cold air to enter the room.
C They act as vents for hot air to pass out of the room.
Hot air is lighter than cold air. So it always tends to move upwards. Ventilators help hot air to escape out of the room or house. As the hot air escapes out, cold air from outside enters the room through doors and ventilators as cold air is heavier.

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Q. Ventilators are provided near ceilings in the rooms of our houses because:
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