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Waste Water Engineering

Waste Water Engineering
For estimating the peak run off the rational formula Q = 0.0278 KpA was evolved by

Kinchling
Frubling
All listed here
Lloyd Davis

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Waste Water Engineering
The detention time of a circular tank of diameter d and water depth H, for receiving the sewage Q per hour, is

d² (0.011d + 0.785H)/Q
d (0.785d + 0.011H)/Q
d (0.022d + 0.085H)/Q
d (0.285d + 0.011H)/Q

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Waste Water Engineering
A sewer running partially full and hurried with back filled, fails in compression due to

Weight of the back fill
All listed here
Weight of the pipe
Superimposed traffic loads

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Waste Water Engineering
It is customary to design a sewer for D.W.F. on the basis of

Average demand
Thrice the average demand
Four times the average demand
Twice the average demand

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Waste Water Engineering
Rate of flow of sewage is generally assumed

Less than the rate of water supply
At 150 litres per capita
More than the rate of water supply
Equal to the rate of water supply

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Waste Water Engineering
In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time?

150 mm dia
100 mm dia
225 mm dia
All of these

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