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Waste Water Engineering

Waste Water Engineering
The settlement velocity of a solid (diameter 0.5 mm, specific gravity 1.75) in water having temperature 10°C, is

313.5 cm/sec
500 cm/sec
413.5 cm/sec
213.5 cm/sec

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

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

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Waste Water Engineering
Disposal to sewage in large cities, is done in

Dilution
Oxidation
Purification
Irrigation

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Waste Water Engineering
Which one of the following tests is used for testing sewer pipes?

Water test
All of these
Mirror test
Ball test

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Waste Water Engineering
In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept

0.25
2
5
10

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Waste Water Engineering
For house drainage minimum gradient is

1 in 80
1 in 400
1 in 10
1 in 60

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