Civil Engineering - GATE Exam Questions - Discussion

Discussion Forum : GATE Exam Questions - Section 1 (Q.No. 43)
43.
The drop manholes are provided in a sewerage system when there is
change in alignment of sewer line
change in size of sewers
change in the elevation of ground level
change from gravity system to pressure system
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
7 comments Page 1 of 1.

Adnan Memon said:   4 years ago
Option C is correct because Drop manholes are provided to connect high level sewer with low level sewer so, Change in elevation b/w two is necessary.

Mostafa hafij ahmed said:   5 years ago
I think A is the correct answer.

Neeraj said:   5 years ago
Selecting the best alternative leads to option C.

Abdul said:   7 years ago
When a sewer connects with another sewer, where the difference in level between invert level of branch sewer and water line in the main sewer at maximum discharge is greater than 0.6m, a manhole may be built either with vertical or nearly vertical drop pipe from higher sewer
to the lower one.

So, C is the correct option.

Varma said:   7 years ago
I think B is correct. I also agree.

Jagdish said:   8 years ago
Answer is B.

Chhaya said:   8 years ago
I think all four condition drop manhole required.

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