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Question
At the same mean velocity of flow, the ratio of head loss per unit length for a sewer pipe running full to that for the same pipe flowing half-full is:
A.
2.0
B.
1.67
C.
1.0
D.
0.67
Answer ( Option C)

1.0

Solution

From Darcy Weisbach equation, head loss due
Given, mean velocity, pipe material and diameter of pipe is same.
Hence, the ratio of head loss is unity.

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