Civil Engineering - UPSC Civil Service Exam Questions - Discussion

12. 

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

Answer: Option B

Explanation:

No answer description available for this question.

Subha Annadurai said: (Mar 15, 2018)  
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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