Discussion :: Waste Water Engineering - Section 1 (Q.No.6)
If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is
Answer: Option C
No answer description available for this question.
|Sandip Ghosh said: (Dec 9, 2014)|
|But actually 1 in 105 for a velocity of 0.9m/s & 1 in 150 for a velocity of 0.75m/s.|
|Aman Gautam said: (Dec 10, 2014)|
Greater is the gradient, greater is the velocity. Thus your point is wrong and as for 225 mm diameter, velocity should be 1 m/s. So it would require the highest gradient.
|Manohar said: (Jul 9, 2015)|
|Yes, the gradient, 1 in 105 is greater than 1 in 150.|
|Ganesh said: (Oct 29, 2015)|
|Which formula is used here to calculate self cleansing formula?|
|Akash said: (Dec 26, 2015)|
|V-under root (8 beta under f multiply by (specific gravity of solids- 1)*g*diameter of solids). Find v and using manning or any other formula find slope. But data is not sufficient.|
|Narayan said: (Jan 17, 2016)|
|Velocity of the sewer is 0.9 to 0.75 m^3/s.
So assume velocity of sewer V = 0.9 m/s.
And using the manning's formula:
V = R^2/3*s^1/2/n but the wastage flow is not specify.
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