Question

chimneys in factories and workshops are kept above roof top. Why?​

Answer 1

Answer:

Chimneys are provided over the furnace in factories. This is because the hot gases coming out of the furnace are less dense than the air. ... around the furnace rush in so as to take their place and they are sucked out. Thus, the chimney helps to remove the undesired fumes, smoke etc.

Explanation:

chimneys in factories and workshops are kept above roof top. Why?

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