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Waste Water Engineering

Waste Water Engineering
The drop man holes are generally provided in sewers for

Hilly town ships
Large town ships
Cities in plains
Industrial areas

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Waste Water Engineering
In sewage having fully oxidised organic matter, the nitrogen exists in the form of

Aluminoid nitrogen
Free ammonia
Nitrates
Nitrites

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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
None of these
Industrial waste
Storm sewage

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Waste Water Engineering
Chlorination of water is done for the removal of

Hardness
Sediments
Bacterias
Suspended solids

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Waste Water Engineering
The asbestos cement pipes are generally laid

Vertically
At an angle of 60°
Horizontally
At an angle of 30°

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

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