Q112
General ScienceChemistry
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: (C) to maintain convectional currents to keep the air fresh in the room
Warm, stale air rises and escapes through ventilators placed near the ceiling, drawing in fresh air from lower openings and setting up a convection current that continuously refreshes the air in the room.