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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
Crimp and Bruges
Kutter
Bazin

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Waste Water Engineering
The spacing of bars for perforations in coarse screens used for the treatment of sewage, is

20 mm
40 mm
50 mm
30 mm

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

Free ammonia
Nitrites
Nitrates
Aluminoid nitrogen

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Waste Water Engineering
Dried sewage after treatment is used as

Fertilizer
Chemical for lowering B.O.D.
Building material
Base material for paints

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Waste Water Engineering
In normal conditions, the period for sludge digestion, is

10 days
20 days
60 days
30 days

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Waste Water Engineering
The non-clog pump which permits solid matter to pass out with the liquid sewage, is

None of these
Centrifugal pump
Reciprocating pump
Pneumatic ejector

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