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Waste Water Engineering

Q1: Drop manholes at the junctions of sewer lines, are provided if

A invert level of a branch sewer is more than 60 cm that of the main sewer

B sewer line runs along a main road

C ordinary manhole cannot be built

D two sewer lines intersect.

ANS:A - invert level of a branch sewer is more than 60 cm that of the main sewer

Drop manholes at the junctions of sewer lines are provided if the invert level of a branch sewer is more than 60 cm lower than that of the main sewer. So, the correct statement is: "Invert level of a branch sewer is more than 60 cm lower than that of the main sewer."



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