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Waste Water Engineering

Waste Water Engineering
If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is

None of these
1 in 120
1 in 60
1 in 100

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Waste Water Engineering
Dry water flow in a combined sewer, is

Domestic sewage
Storm water
Industrial sewage
Inclusive of domestic and industrial sewage but excludes storm water

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Waste Water Engineering
The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is

5 m
6.5 m
5.5 m
7 m

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Waste Water Engineering
The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called

Inverted syphon
Depressed sewer
all of these
Sag pipe

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Waste Water Engineering
For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed

4 ppm
5 ppm
3 ppm
10 ppm

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Waste Water Engineering
The coagulant which is generally not used for treating the sewage, is

Chlorinated coppers
Ferric sulphate
Ferric chloride
Alum

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