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Waste Water Engineering

Waste Water Engineering
The algae dies out in the zone of

Cleaner water
Recovery
Active decomposition
Degradation

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

3 ppm
5 ppm
4 ppm
10 ppm

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Waste Water Engineering
If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is

1 in 120
None of these
1 in 60
1 in 100

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Waste Water Engineering
The water carried sewerage system removes

Industrial sewage
Domestic sewage
All listed here
Storm sewage

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Waste Water Engineering
The discharge per unit plan area of a sedimentation tank, is generally called

Over flow rate
Surface loading
All of these
Over flow velocity

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Waste Water Engineering
The sewage treatment in septic tanks is due to

Parasitic decomposition
Anaerobic decomposition
None of these
Aerobic decomposition

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