Hydraulics and Fluid Mechanics in ME
Runaway speed of a hydraulic turbine is

The speed at which turbine runner will be damaged
The speed corresponding to maximum overload permissible
Full load speed
The speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open

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Hydraulics and Fluid Mechanics in ME
The function of guide vanes in a reaction turbine is to

Allow the water to flow over them, without forming eddies
All of the listed here
Allow the water to enter the runner without shock
Allow the required quantity of water to enter the turbine

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

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