Waste Water Engineering
Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is?

Pneumatic ejector
None of these
Reciprocating pump
Centrifugal pump

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Waste Water Engineering
In case of sewer lines

Test for straightness is carried out with the help of a lamp and mirror
Water test is carried out to check water tightness of the joints
All listed here
Obstruction test is carried out with the help of smooth ball of diameter 13 mm

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