Kaplan water turbine is commonly used when the flow through

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Kaplan water turbine is commonly used when the flow through its runner is

1. axial and the head available is more than 100 m
2. axial and the head available is less than 10 m
3. radial and the head available is more than 100 m
4. mixed and the head available is about 50 m

Correct Option: B

Kaplan turbine is an axial flow turbine and works at low heads (<50).