Discussion
If at the inlet of the turbine, energy available is only kinetic energy, the turbine is known as:
Answer: B
It is an impulse turbine.
In an impulse turbine, such as the Pelton wheel, all the available head is converted into kinetic energy in the nozzle, and the jet strikes the buckets at atmospheric pressure.
In a reaction turbine, such as the Francis turbine (a radial or mixed flow machine), the water enters with both pressure energy and kinetic energy, and pressure keeps falling through the runner.
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