Q. Name the ratio of power available at the shaft of a turbine to the power delivered by water to the runner.
Solution:
Volumetric efficiency is ratio between volume of water actually striking the runner of turbine and volume of water supplied to the turbine.
Overall efficiency is defined as ratio of power available at shaft of turbine to power supplied at the inlet of turbine which is also product of mechanical and hydraulic efficiency.
Ratio of power at the shaft of turbine and power delivered by water to runner is known as mechanical efficiency.
Hydraulic efficiency is defined as ratio between power given by water to runner of turbine and to the power supplied by water at inlet of the turbine.
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