Waste Water Engineering
The disintegrating pump in which solid matter is broken up before passing out, is

Reciprocating pump
Pneumatic ejector
Centrifugal pump
None of these

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Waste Water Engineering
The sewers

Must be laid at least 2 to 3 m deep to collect /water from the basements
All listed here
Must be of adequate size to avoid over flow
Must flow under gravity ½ to ¾ full

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Waste Water Engineering
Traps

Dissolve the foul gases
Are water seals which prevent the entry of foul gases
Are used to trap the rats entering sewers
Create symphonic action to increase the quick disposal of sewerage

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