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Waste Water Engineering

Waste Water Engineering
For large sewers, maximum distance between manholes may be

200 m
50 m
100 m
300 m

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Waste Water Engineering
The detention time of a circular tank of diameter d and water depth H, for receiving the sewage Q per hour, is

d (0.785d + 0.011H)/Q
d (0.285d + 0.011H)/Q
d² (0.011d + 0.785H)/Q
d (0.022d + 0.085H)/Q

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Waste Water Engineering
Are available in size Stoneware sewers

20 cm
10 cm
15 cm
All of these

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Waste Water Engineering
Dried sewage after treatment is used as

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

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Waste Water Engineering
Bottom openings 15 cm × 15 cm in the standing baffle wall are provided

15 cm c/c
50 cm c/c
22.5 cm c/c
30 cm c/c

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Waste Water Engineering
It is customary to design a sewer for D.W.F. on the basis of

Thrice the average demand
Average demand
Four times the average demand
Twice the average demand

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