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Waste Water Engineering

Waste Water Engineering
For design of sewers, percentage of sewage discharge is assumed

75 to 80%
70 to 75%
65 to 70%
0.85

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Waste Water Engineering
Hume steel pipes are

Both B and C
Steel shell coated from outside with cement mortar
Steel shell coated from inside with cement mortar
Steel pipes

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Waste Water Engineering
A well oxidized sewage contains nitrogen mainly as

None of these
Nitrates
Nitrites
Free ammonia

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

200 m
50 m
100 m
300 m

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Waste Water Engineering
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,

Is not enough
Is doubled
Is trebled
Is only provided

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Waste Water Engineering
A nuisance is experienced in diluting water if dilution factor is less than

60
20
100
40

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