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Waste Water Engineering

Waste Water Engineering
In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is

2.25
2.65
2.55
2.5

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Waste Water Engineering
The ratio of design discharge to the surface area of a sedimentation tank is called

All of these
Overflow velocity
Overflow rate
Surface loading

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Waste Water Engineering
Kjeldahl nitrogen is a mixture of

Organic nitrogen and ammonia
All listed here
Ammonia and nitrogen
Nitrogen and organic nitrogen

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Waste Water Engineering
Drop manholes at the junctions of sewer lines, are provided if

Two sewer lines intersect
Sewer line runs along a main road
Ordinary manhole cannot be built
Invert level of a branch sewer is more than 60 cm that of the main sewer

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

Skin cancer
Heart disorder
Bronchitis
Lung cancer

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Waste Water Engineering
The quantity of liquid waste which flows in sewers during the period of rainfall, is known

Sanitary sewage
Storm sewage
None of these
Industrial waste

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