Head range suitability: Francis turbine selection Identify the usual range of available water head for which a Francis (mixed-flow reaction) turbine is preferred. Choose the correct range.
Mechanical Engineering
Hydraulic Machines
Difficulty: Easy
Choose an option
-
A0 to 25 m
-
B25 m to 250 m
-
CAbove 250 m
-
DNone of these
Answer
Correct Answer: 25 m to 250 m
Explanation
Concept
- Francis turbines are medium-head mixed-flow reaction machines.
- Kaplan suits low head; Pelton suits high head.
Typical rangesFrancis: ≈ 25–250 m, depending on specific speed and site conditions.
Final Answer25 m to 250 m.