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Waste Water Engineering

Waste Water Engineering
For house drainage minimum gradient is

1 in 10
1 in 60
1 in 400
1 in 80

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Waste Water Engineering
Self-cleansing velocity is

Velocity of water in a pressure filter
Velocity at dry weather flow
Velocity at which no accumulation remains in the drains
Velocity of water at flushing

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Waste Water Engineering
Water content of sewage is about

0.999
0.9
0.99
0.95

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Waste Water Engineering
The temperature affects the

Biological activity of bacteria in sewage
Viscosity of sewage
Solubility of gases in sewage
All of these

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Waste Water Engineering
If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by

Chezy
Kutter
Manning
Bazin

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Waste Water Engineering
For sewers, inverted siphon is provided for

Four pipes
One pipe
Three pipes
Two pipes

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