Q. It is seen that in proper ventilation of building, windows must be opened near the bottom and the top of the walls, so as to let pass
A) In hot near the roof and cool air out near the bottom
B) Out hot air near the roof
C) In cool air near the bottom and hot air our near the roof
D) In more air
Explanation
(c) Moist and hot air being lighter rises up and leaves the room throught the ventilator near the roof and fresh air rushes into the room throught the doors.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.