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UPSC Civil Service Exam Questions

Q1: When are dropman holes provided in a sewerage system ?

A There is a change from gravity system to pressure system

B There is a change in the elevation of the ground level

C There is change in the diameter of the sewer

D There is change in the direction of the sewer line

ANS:B - There is a change in the elevation of the ground level

Dropman holes are provided at a point of every bend, junction, change of gradient or change sewer CIA and regular intervals in a straight line. So option B, C D are correct.



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