Effective head in a pipeline/turbine installation: compute net head from gross head and friction loss Let H<sub>g</sub> be the gross (total) head and h<sub>f</sub> 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
-
AH = H<sub>g</sub> / h<sub>f</sub>
-
BH = H<sub>g</sub> × h<sub>f</sub>
-
CH = H<sub>g</sub> + h<sub>f</sub>
-
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.