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Waste Water Engineering

Waste Water Engineering
The asbestos cement pipes are generally laid

At an angle of 60°
At an angle of 30°
Horizontally
Vertically

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Waste Water Engineering
For sewers, inverted siphon is provided for

Two pipes
Four pipes
Three pipes
One pipe

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Waste Water Engineering
For house drainage minimum gradient is

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

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Waste Water Engineering
A circular sewer section is preferred to because

It provides maximum area for a given perimeter
All listed here
It provides maximum hydraulic mean depth
It is cheaper in construction

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Waste Water Engineering
For a continuous flow type of sedimentation tanks

Width of the tank is normally kept about 6 m
All listed here
Maximum horizontal flow velocity is limited to 0.3 m/minute
Length of the tank is normally kept 4 to 5 times the width

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Waste Water Engineering
Dried sewage after treatment is used as

Chemical for lowering B.O.D.
Fertilizer
Base material for paints
Building material

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