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Waste Water Engineering

Waste Water Engineering
Fresh sewage is generally

A source of objectionable odour
Acidic
Highly decomposed
Alkaline

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Waste Water Engineering
For large sewers, maximum distance between manholes may be

200 m
300 m
100 m
50 m

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Waste Water Engineering
For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed

5 ppm
10 ppm
3 ppm
4 ppm

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Waste Water Engineering
A manhole is generally provided at each

All of these
Junction
Change of gradient
Bend

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

Nitrites
Aluminoid nitrogen
Nitrates
Free ammonia

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Waste Water Engineering
The use of coarse screens for the disposal of sewage, may be dispensed with by

Shredder
Both A and B
Comminutor
Neither A nor B

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