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WASTE WATER ENGINEERING

Waste Water Engineering
Which one of the following gases is most significant as air pollutant?

Nitrogen
Carbondioxide
Sulphur-dioxide
Oxygen

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Waste Water Engineering
The standard B.O.D. of water is taken for

5 days
2 days
1 day
3 days

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Waste Water Engineering
Dried sewage after treatment is used as

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

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

Out-fall sewer
Branch sewer
Main sewer
House sewer

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Waste Water Engineering
The temperature affects the

Biological activity of bacteria in sewage
Solubility of gases in sewage
All of these
Viscosity of sewage

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