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Waste Water Engineering

Waste Water Engineering
No treatment of the sewage is given if dilution factor is

Between 200 to 300
Between 150 to 200
Less than 150
More than 500

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Waste Water Engineering
The sewer which transports the sewage to the point of treatment, is called

Out-fall sewer
Main sewer
Branch sewer
House sewer

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

10
5
20
15

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Waste Water Engineering
The grit and silt of the grit chambers, may not be used for

Both A and B
Raising low lying areas by dumping
Concreting
Neither A nor B

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Waste Water Engineering
A five day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is

100
5000
10000
1000

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Waste Water Engineering
Disposal to sewage in large cities, is done in

Purification
Dilution
Irrigation
Oxidation

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