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Waste Water Engineering

Waste Water Engineering
Imhoff cone is used to measure

Total in organic solids
Total solids
Total organic solids
Settleable solids

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Waste Water Engineering
The detention period for plain sedimentation water tanks, is usually

8 to 16 hours
16 to 24 hours
4 to 8 hours
24 to 36 hours

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Waste Water Engineering
The dimensions of a rectangular settling tank are: length 24 m, width 6 m and depth 3 m. If 2 hour detention period for tanks is recommended, the rate of flow of sewage per hour, is

216 cu.m
212 cu.m
204 cu.m
208 cu.m

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Waste Water Engineering
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,

Is only provided
Is trebled
Is not enough
Is doubled

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Waste Water Engineering
Hume steel pipes are

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

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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

15
5
20
10

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