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Waste Water Engineering

Waste Water Engineering
The bottom of the sewage inlet chamber of septic tanks, is provided an outward slope

1 in 10
1 in 20
1 in 15
1 in 5

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Waste Water Engineering
The temperature affects the

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

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Waste Water Engineering
The underground sewers are more subjected to

Tensile force
Shearing force
Compressive force
Bending force

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Waste Water Engineering
With self cleansing velocity in sewers

Silting occurs at bottom
Neither silting nor scouring occurs at bottom
Scouring occurs at bottom
Both silting and scouring occur at bottom

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

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

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Waste Water Engineering
Depletion of ozone layer in the outer atmosphere may cause

Skin cancer
Lung cancer
Heart disorder
Bronchitis

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