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Waste Water Engineering

Waste Water Engineering
Water content of sewage is about

0.99
0.9
0.95
0.999

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Waste Water Engineering
hydraulically equivalent, the relationship which holds good, is

D2/3 = 4 b2/3
D8/3 = 4 b8/3
D3/8 = 4 b3/8
D3/2 = 4 b3/2

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Waste Water Engineering
The dimensions of a rectangular settling tank are: length 24 m, width 6 m and depth 3 m. If 2 hour detention period for tanks is recommended, the rate of flow of sewage per hour, is

216 cu.m
204 cu.m
212 cu.m
208 cu.m

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

Free ammonia
Nitrates
Aluminoid nitrogen
Nitrites

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Waste Water Engineering
The sewerage system consists of

All of these
Branch sewer
House sewer
Lateral sewer

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Waste Water Engineering
The laying of sewers is done with

Level
Clinometer
Magnetic compass
Theodolite

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