Civil Engineering - GATE Exam Questions - Discussion

Discussion Forum : GATE Exam Questions - Section 4 (Q.No. 1)
1.
At the same mean velocity, the ratio of head loss per unit length for a sewer pipe flowing full to that for the same pipe flowing half full would be :
2.0
1.63
1.00
0.61
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
16 comments Page 1 of 2.

Abhishek thakur said:   4 years ago
@Deepakbaswal.

Yes, you are right. Thanks.
(1)

Shubham said:   9 years ago
Answer should be 1.

Because head loss per unit length does not depend on the depth of water in a sewer pipe.

Jimmy said:   9 years ago
Please explain in detail.

Joshi said:   9 years ago
Thanks @Shubham.

DeepakBaswal said:   8 years ago
(.81/.5) = 1.61.
Flowing full in pipe = 81%.
Flowing half in pipe= 50%.

Roy said:   8 years ago
1 is the correct answer.

Siva said:   8 years ago
You are right, I agree @Shubham.

Naina paliwal said:   7 years ago
Please explain the solution with the correct formula.

Dolly said:   7 years ago
C must be the correct answer.

Utsav said:   7 years ago
Head loss due to friction/unit length of pipe is proportional to mean velocity square V^2 and inversely proportional to diameter D of the pipe.

V = volumetric flow rate remains same.

So, head loss due to friction: ratio when flowing full/when flowing half full = 1.


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