Waste Water Engineering
The non-clog pump which permits solid matter to pass out with the liquid sewage, is

None of these
Centrifugal pump
Reciprocating pump
Pneumatic ejector

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Waste Water Engineering
Dilution method of disposing of sewage, is not preferred to

When diluting water is used for water supply near the point of sewage disposed
When diluting water has high dissolved oxygen content
When sewage is fresh
When the diluting water is having flow currents

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