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Waste Water Engineering

Waste Water Engineering
The minimum diameter of sewer to be adopted is

25 cm
15 cm
10 cm
12.5 cm

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Waste Water Engineering
In sewage having fully oxidised organic matter, the nitrogen exists in the form of

Nitrites
Aluminoid nitrogen
Nitrates
Free ammonia

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Waste Water Engineering
The sludge does not contain waste water from

Toilets
Kitchen sinks
Wash basins
Bath rooms

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Waste Water Engineering
In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is

20
15
5
10

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Waste Water Engineering
The formula V = (1/n) r2/3

Kutter’s formula
Bazin’s formula
Chezy’s formula
Manning’s formula

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Waste Water Engineering
If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by

Bazin
Manning
Chezy
Kutter

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