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WASTE WATER ENGINEERING

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

Sulphur-dioxide
Carbondioxide
Oxygen
Nitrogen

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

5 days
3 days
1 day
2 days

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Waste Water Engineering
Dried sewage after treatment is used as

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

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

Branch sewer
Main sewer
Out-fall sewer
House sewer

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Waste Water Engineering
The temperature affects the

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

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