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If H is the total head at inlet and h is the head lost due to friction, efficiency of power transmission through a straight pipe is given by
1. \(\frac{{H - h}}{H}\)
2. \(\frac{H}{{H + h}}\)
3. \(\frac{{H - h}}{{H + h}}\)
4. \(\frac{H}{{H - h}}\)

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Correct Answer - Option 1 : \(\frac{{H - h}}{H}\)
\(Efficincy = \frac{{Net\;output\;head}}{{Input\;head}} = \frac{{H - h}}{H}\)

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