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Waste Water Engineering

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
15
20
5

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Waste Water Engineering
The sewer that unloads the sewage at the point of treatment is called

Outfall sewer
Branch sewer
House sewer
Main sewer

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Waste Water Engineering
Imhoff cone is used to determine

None of these
Settleable solids
Dissolved solids
Suspended solids

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Waste Water Engineering
To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of

Nitric acid
Citric acid
Sulphuric acid
Hydrochloric acid

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Waste Water Engineering
The following is the physical characteristic of sewage

Turbidity
Odour
Colour
All listed here

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Waste Water Engineering
Hume steel pipes are

Steel shell coated from inside with cement mortar
Steel shell coated from outside with cement mortar
Both B and C
Steel pipes

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