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Waste Water Engineering

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

0.68 m
1.36 m
0.88 m
1.76 m

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Waste Water Engineering
The grit and silt of the grit chambers, may not be used for

Concreting
Neither A nor B
Raising low lying areas by dumping
Both A and B

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

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Waste Water Engineering
¾th or ¼th extra space is left in sewer pipes at maximum discharge for

Low estimates of the average and maximum flows
Unexpected increase in population
Large scale infiltration of storm water
All listed here

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Waste Water Engineering
Kjeldahl nitrogen is a mixture of

Nitrogen and organic nitrogen
All listed here
Organic nitrogen and ammonia
Ammonia and nitrogen

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Waste Water Engineering
The maximum diameter of sewers adopted in the designs is

1.0 m
3.0 m
2.0 m
4.0 m

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