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Waste Water Engineering

Waste Water Engineering
The pH value of sewage is determined with the help of

None of these
Potentiometer
Imhoff Cone
Turbid meter

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Waste Water Engineering
The following is the physical characteristic of sewage

Colour
All listed here
Odour
Turbidity

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Waste Water Engineering
The normal values of over flow rates for sedimentation tanks using coagulant, ranges between

40,000 to 50,000 litres/sqm/day
25,000 to 35,000 litres/sqm/day
50,000 to 60,000 litres/sqm/day
80,000 to 100,000 litres/sqm/day

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Waste Water Engineering
In sewage, the solids in mg per litre is

100 to 500
1500 to 2000
500 to 1000
1000 to 1500

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Waste Water Engineering
The normal values of over flow rates for secondary sedimentation tanks, ranges between

80,000 to 10,000 litres/sqm/day
50,000 to 60,000 litres/sqm/day
25,000 to 35,000 litres/sqm/day
40,000 to 50,000 litres/sqm/day

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Waste Water Engineering
The drop man holes are generally provided in sewers for

Cities in plains
Large town ships
Industrial areas
Hilly town ships

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