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Waste Water Engineering

Waste Water Engineering
An inverted siphon is designed generally for

One pipe
Four pipes
Three pipes
Two pipes

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Waste Water Engineering
The sewerage system originates from

House sewers
Main sewers
Branch sewers
Lateral sewers

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Waste Water Engineering
No treatment of the sewage is given if dilution factor is

More than 500
Between 150 to 200
Less than 150
Between 200 to 300

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

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

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Waste Water Engineering
Flocculated particles do not change their

Weight
Size
None of these
Shape

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Waste Water Engineering
The ratio of maximum sewage flow to average sewage flow for trunk mains having diameters more than 1.25 m, is

1.5
2
3
4

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