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Waste Water Engineering

Waste Water Engineering
Dried sewage after treatment is used as

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

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Waste Water Engineering
If is the diameter of upper circular portion, the overall depth of New Egg shaped sewer section, is

1.350 D
1.425 D
1.250 D
1.625 D

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Waste Water Engineering
If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of

Cleaner water
Active decomposition
Recovery
Degradation

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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

Kutter
Crimp and Bruges
William-Hazen
Bazin

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Waste Water Engineering
At the junction of sewers

None of these
Top of larger sewer is kept lower
Tops of both the sewers are at the same level
Top of smaller sewer is kept lower

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Waste Water Engineering
In sewers the gas generally found, is

Hydrogen sulphide (H2S)
All listed here
Carbon dioxide (CO2)
Methane (CH4)

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