If the Francis turbine is run below 50 percent head for a long period, it will not only lose its efficiency but also the cavitation danger will become more serious.
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Agree
Hydraulic Machines problems
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1. If the ratio's of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.
8. A hydraulic intensifier is a device used to increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure.