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Waste Water Engineering

Waste Water Engineering
For estimating the peak run off the rational formula Q = 0.0278 KpA was evolved by

Kinchling
Lloyd Davis
All listed here
Frubling

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

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

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

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

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

Water test
All of these
Mirror test
Ball test

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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
hydraulically equivalent, the relationship which holds good, is

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

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