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Waste Water Engineering

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

Cities in plains
Large town ships
Industrial areas
Hilly town ships

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Waste Water Engineering
For efficient working of a sewer, it must be ensured that

Minimum velocity of 0.45 m/sec, is maintained at its minimum flow
Neither (A) nor (B)
Both (A) and (B)
A maximum velocity of 0.90 m/sec, is maintained at its maximum flow

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Waste Water Engineering
The rate of accumulation of sludge in septic tanks is recommended as

25 litres/person/year
30 litres/person/year
30 litres/person/month
25 litres/person/month

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Waste Water Engineering
It is customary to design a sewer for D.W.F. on the basis of

Thrice the average demand
Four times the average demand
Twice the average demand
Average demand

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Waste Water Engineering
In case of Imhoff tanks,

Detention period is 2 hours
The velocity of flow is restricted to 0.30 m/minute
The shape is rectangular
All of these

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Waste Water Engineering
Which one of the following tests is used for testing sewer pipes?

Water test
Ball test
All of these
Mirror test

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