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Waste Water Engineering

Waste Water Engineering
15 cumecs, the depth d and width are related by For drains up to

d = 0.2 B
d = 0.5 B
B = 0.5 d
B = 0.2 d

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Waste Water Engineering
For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of

160 cm
120 cm
140 cm
100 cm

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Waste Water Engineering
The normal value of over flow rates for plain primary sedimentation tanks, ranges between

25,000 to 35,000 litres/sqm/day
80,000 to 100,000 litres/sqm/day
50,000 to 60,000 litres/sqm/day
40,000 to 50,000 litres/sqm/day

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Waste Water Engineering
For sewer mains of 0.5 to 1 m diameter, the ratio of maximum daily sewage flow to the average daily sewage flow is assumed

2
3
1.5
2.5

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Waste Water Engineering
An inverted siphon is designed generally for

Three pipes
Two pipes
One pipe
Four pipes

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Waste Water Engineering
Sludge banks are formed if sewage is disposed of in

None of these
Lakes
Rivers
Seas

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