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Question

A 90 elbow bend pipe diameter is 100 mm and loss coefficient is 0.9. Pipe friction factor is 0.02. What is the equivalent length of the pipe?

A
9 m
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B
2.25 m
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C
1.125 m
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D
4.5 m
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Solution

The correct option is D 4.5 m
Equivalent length of pipe (Le) concept :

Hbend=hfriction loss

KB.V22g=f.L.V22gD

KB=fLD

L=D.KBf

Equivalent length (Le)=0.1×0.90.02

=4.5 m

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