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Waste Water Engineering

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

100 m
50 m
200 m
300 m

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Waste Water Engineering
Rate of flow of sewage is generally assumed

Equal to the rate of water supply
More than the rate of water supply
Less than the rate of water supply
At 150 litres per capita

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Waste Water Engineering
For trunk sewers more than 1.25 m in diameter, the ratio of the maximum daily sewage flow to the average daily sewage flow is assumed

1.5
2
3
2.5

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Waste Water Engineering
For evaporation and measurement of settable solids, the apparatus used, is

A jar
An Imhoff cone
A test tube
A breaker

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Waste Water Engineering
The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is

0.88 m
0.68 m
1.36 m
1.76 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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