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Waste Water Engineering

Waste Water Engineering
The pH value of sewage is determined with the help of

Turbid meter
Potentiometer
None of these
Imhoff Cone

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Waste Water Engineering
The underground sewers are more subjected to

Bending force
Shearing force
Tensile force
Compressive force

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Waste Water Engineering
If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is

2 hours
6 hours
4 hours
8 hours

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Waste Water Engineering
The coagulant which is generally not used for treating the sewage, is

Alum
Ferric chloride
Chlorinated coppers
Ferric sulphate

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Waste Water Engineering
The detention time of a circular tank of diameter d and water depth H, for receiving the sewage Q per hour, is

d (0.022d + 0.085H)/Q
d² (0.011d + 0.785H)/Q
d (0.785d + 0.011H)/Q
d (0.285d + 0.011H)/Q

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Waste Water Engineering
The factor responsible for purification of sewage in river is

Temperature
Dissolved oxygen in water
All listed here
Hydrology

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