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Waste Water Engineering

Waste Water Engineering
The sludge does not contain waste water from

Toilets
Wash basins
Bath rooms
Kitchen sinks

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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 upward
1 in 500 upward
1 in 100 downward

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Waste Water Engineering
An inverted siphon is designed generally for

Three pipes
Four pipes
One pipe
Two pipes

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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

1.76 m
0.88 m
0.68 m
1.36 m

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Waste Water Engineering
The digested sludge from septic tanks, is removed after a maximum period of

5 years
3.5 years
3 years
4 years

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Waste Water Engineering
The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is

30 m
75 m
45 m
20 m

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