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Waste Water Engineering

Waste Water Engineering
The minimum diameter of a sewer is kept

25 cm
15 cm
20 cm
10 cm

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

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

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Waste Water Engineering
The temperature affects the

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

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Waste Water Engineering
The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is

1 in 503 upward
1 in 100 downward
1 in 500 upward
1 in 100 upward

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Waste Water Engineering
A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is

2.40 m
2.45 m
2.50 m
2.30 m

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Waste Water Engineering
The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is

5 m
7 m
5.5 m
6.5 m

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