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WASTE WATER ENGINEERING

Waste Water Engineering
The formula which accepts the value of rugosity coefficient n = 0.012 to be used in Manning’s formula, is given by

Crimp and Bruges
Kutter
Bazin
William-Hazen

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Waste Water Engineering
For large sewers, maximum distance between manholes may be

200 m
100 m
300 m
50 m

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Waste Water Engineering
In sewage, the solids in mg per litre is

1500 to 2000
500 to 1000
100 to 500
1000 to 1500

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Waste Water Engineering
For the COD test of sewage, organic matter is oxidised by K₂Cr₂O₇ in the presence of

HCl
H₂SO₄
HNO₃
None of these

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Waste Water Engineering
To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of

Sulphuric acid
Nitric acid
Citric acid
Hydrochloric acid

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