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Waste Water Engineering

Waste Water Engineering
The underground sewers are more subjected to

Bending force
Tensile force
Compressive force
Shearing force

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Waste Water Engineering
The minimum recommended diameter of sewers, is

15 cm
10 cm
20 cm
5 cm

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Waste Water Engineering
Imhoff cone is used to measure

Total organic solids
Settleable solids
Total solids
Total in organic solids

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Waste Water Engineering
To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is

0.70 m/sec
0.50 m/sec
0.60 m/sec
0.75 m/sec

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Waste Water Engineering
Ventilating shafts are provided to a sewer line at every

200 m
300 m
150 m
100 m

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Waste Water Engineering
The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is

100 cm
110 cm
150 cm
120 cm

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