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Waste Water Engineering

Waste Water Engineering
The first stage of neutral process of sludge digestion, is

Acid fermentation
Alkaline fermentation
None of these
Acid regression

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Waste Water Engineering
The temperature affects the

Viscosity of sewage
Solubility of gases in sewage
Biological activity of bacteria in sewage
All of these

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Waste Water Engineering
A rain sanitary sewer is constructed to carry

Ground water
Storm sewage
Sanitary sewage
Surface water

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

Centrifugal pump
Reciprocating pump
None of these
Pneumatic ejector

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Waste Water Engineering
The rate of accumulation of sludge per person per year, is

20 litres
10 litres
15 litres
25 litres

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Waste Water Engineering
In sewers the velocity of flow should not be

More than 20 m/sec
Less than the self-cleansing velocity
More than the self-cleansing velocity
Less than 10 m/sec

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