Effective head in a pipeline/turbine installation: compute net head from gross head and friction loss Let Hg be the gross (total) head and hf be the head loss due to friction in the conveyance system. Write the expression for the net or effective head H reaching the turbine. Choose the correct formula.
Mechanical Engineering
Hydraulic Machines
Difficulty: Easy
Choose an option
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AH = H<sub>g</sub> / h<sub>f</sub>
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BH = H<sub>g</sub> × h<sub>f</sub>
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CH = H<sub>g</sub> + h<sub>f</sub>
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DH = H<sub>g</sub> − h<sub>f</sub>
Answer
Correct Answer: H = H<sub>g</sub> − h<sub>f</sub>
Explanation
ConceptLosses (e.g., pipe friction, fittings) reduce the head available to the runner.
ComputationNet head: H = Hg − hf.
Final AnswerH = Hg − hf.