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Waste Water Engineering

Waste Water Engineering
For drainage pipes in buildings the test applied before putting them to use, is

Smoke test
All listed here
Water test
Straightness test

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Waste Water Engineering
The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is

7 m
5.5 m
6.5 m
5 m

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Waste Water Engineering
The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is

0.05554 cumec
0.05552 cumec
0.05556 cumec
0.0556 cumec

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Waste Water Engineering
Self-cleansing velocity is

Velocity of water at flushing
Velocity of water in a pressure filter
Velocity at which no accumulation remains in the drains
Velocity at dry weather flow

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Waste Water Engineering
The average temperature of sewage in India, is

20°C
25°C
10°C
15°C

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Waste Water Engineering
The standard B.O.D. of water is taken for

2 days
5 days
1 day
3 days

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