Hydraulics and Fluid Mechanics in ME
The cavitation in a hydraulic machine

All of these
Reduces the discharge of a turbine
Causes noise and vibration of various parts
Causes sudden drop in power output and efficiency

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Hydraulics and Fluid Mechanics in ME
The discharge through a channel of trapezoidal section is maximum when

The sloping side is equal to the width at the bottom
The sloping side is equal to half the width at the top
Width of channel at the top is equal to twice the width at the bottom
Depth of channel is equal to the width at the bottom

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