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Question
Three pipes A, B and C have the following basic geometries

Pipe

A

B

C

Diameter

D

D/2

2D

Length

L

L

4L

If these pipes are connected in series, by assuming the value of friction factor f to be same for all the three pipes and the equivalent pipe, this set of pipes in series is equivalent to a pipe of length Le and diameter D and friction factor f with the equivalent length Le being equal to

A.
B.
C.
D.
Answer ( Option D)

Solution

We know that
[For series connection of pipe]
Given,
D1 = D                     L1 = L
D2 = D/2                 L2 = L
D3 = 2D                   L3 = 4L

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