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Waste Water Engineering

Waste Water Engineering
In olden days the type of section adopted in trunk and out fall sewers was

Egg shaped
Circular shaped
Horse shoe shaped
Parabolic shaped

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Waste Water Engineering
Dried sewage after treatment is used as

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

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

Recovery
Cleaner water
Active decomposition
Degradation

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Waste Water Engineering
If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is

200 ppm
100 ppm
50 ppm
150 ppm

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Waste Water Engineering
The sewer which transports the sewage to the point of treatment, is called

Branch sewer
Main sewer
Out-fall sewer
House sewer

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Waste Water Engineering
The liquid wastes from kitchens, bath rooms and wash basins, is not called

Sewage
Sullage
Liquid waste
None of these

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