Pick up the correct statement from the following:
A. The larger the sewer in size, more will be velocity
B. The smaller the sewer in size, less will be velocity
C. The larger the sewer in size, no deposition will take place
D. The larger the sewer in size, deposition will take place
Answer: Option D
Solution (By Examveda Team)
As the size of the sewer increases, the velocity of the flow decreases because the flow is spread over a larger cross-sectional area.This decrease in velocity can lead to deposition of solids, as the flow may not be strong enough to carry the sediment through the sewer.
Therefore, in larger sewers, there is a higher likelihood of deposition taking place.
This Question Belongs to Civil Engineering >> Waste Water Engineering
Its Not a pipe Flow in which U consider pressure etc. Its some type open channel flow, because the sewer is not running full.
So, more the dia, more will be the velocity at flat Gradient. And less dia less velocity..
I think all options correct except D...
Larger the sewer means the pressure more and the velocity is less.
If the velocity is less means little more sludge deposition occurs.
So, D is the correct one.
according to RS khurmi A is correct