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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

William-Hazen
Bazin
Kutter
Crimp and Bruges

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

100 m
200 m
300 m
50 m

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

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

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

None of these
HCl
H₂SO₄
HNO₃

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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

Hydrochloric acid
Nitric acid
Citric acid
Sulphuric acid

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