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Waste Water Engineering

Waste Water Engineering
The following is the physical characteristic of sewage

Odour
All listed here
Turbidity
Colour

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Waste Water Engineering
The pH value of fresh sewage is usually

Equal to zero
More than 7
Equal to 7
Less than 7

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Waste Water Engineering
The most efficient cross-section of sewers in a combined sewerage system is

Rectangular
Parabolic
New egged
Circular

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Waste Water Engineering
Pick up the incorrect size of stone ware sewers

67.5 cm
52.5 cm
82.5 cm
None of these

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Waste Water Engineering
For design of sewers, percentage of sewage discharge is assumed

75 to 80%
70 to 75%
65 to 70%
0.85

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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
Crimp and Bruges
Kutter

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