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
The speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open
Full load speed

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Hydraulics and Fluid Mechanics in ME
Coefficient of resistance is the ratio of

Actual velocity of jet at vena-contracta to the theoretical velocity
Area of jet at vena-contracta to the area of orifice
Loss of head in the orifice to the head of water available at the exit of the orifice
Actual discharge through an orifice to the theoretical discharge

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Hydraulics and Fluid Mechanics in ME
Venturimeter is used to

Measure the pressure of a flowing liquid
Measure the velocity of a flowing liquid
Measure the pressure difference of liquid flowing between two points in a pipe line
Measure the discharge of liquid flowing in a pipe

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