WBPSC 2019 Solved Paper

© examsiri.com

Question : 133 of 200

Marks: +1, -0

Ventilators are provided at the top of the room

to bring oxygen for breathing.
so that sunlight may enter the room.
to maintain convectional currents to keep the air fresh in the room.
to provide an outlet for carbon dioxide.

Go to Question:

Prev Question

Next Question