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Waste Water Engineering

Waste Water Engineering
In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is

15
10
20
5

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Waste Water Engineering
The dimensions of a rectangular settling tank are: length 24 m, width 6 m and depth 3 m. If 2 hour detention period for tanks is recommended, the rate of flow of sewage per hour, is

216 cu.m
208 cu.m
212 cu.m
204 cu.m

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Waste Water Engineering
The sewerage system consists of

Lateral sewer
House sewer
All of these
Branch sewer

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Waste Water Engineering
Lead caulked joints are used for laying

Stone ware pipes
Earthenware pipes
G.I. pipes
I. pipes

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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
Length of the tank is normally kept 4 to 5 times the width
Maximum horizontal flow velocity is limited to 0.3 m/minute

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Waste Water Engineering
The laying of sewers is done with

Magnetic compass
Level
Clinometer
Theodolite

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