Question

In a reaction turbine like a Francis turbine or a Kaplan turbine ______________

(a) the potential head of water is totally changed into the kinetic head

(b) the potential head of water is partially changed into the kinetic head

(c) the potential head of water is not at all changed into the kinetic head

(d) the change of potential head of water totally or partially depends on other factors as well

I have been asked this question in quiz.

Query is from Hydro Electric Power in division Hydro Electric Power of Irrigation Engineering

Answer 1

Right choice is (b) the potential head of water is partially changed into the kinetic head

The best explanation: In a reaction turbine, only part of the available potential energy is converted into velocity head at the entrance to the runner. The balance portion remains as a pressure head. In Francis turbine, there is an inward radial flow of water and in Francis turbine, there is a mixed flow of water.