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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
An average value of coefficient of velocity is

0.97
0.84
0.62
0.76

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Hydraulics and Fluid Mechanics in ME
The specific speed of a turbine is given by the equation

N√P / H²
N√P / H5/4
N√P / H3/2
N√P / H3

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Hydraulics and Fluid Mechanics in ME
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be

5 meters of water column
2 meters of water column
6 meters of water Column
3 meters of water column

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Hydraulics and Fluid Mechanics in ME
The runaway speed of a hydraulic turbine is the speed

Corresponding to maximum overload permissible
At which there will be no damage to the runner
At which the turbine will run freely without load
At full load

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Hydraulics and Fluid Mechanics in ME
The viscosity of a gas

is independent of temperature
decreases with increase in temperature
is independent of pressure for very high pressure intensities
increases with increase in temperature

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Hydraulics and Fluid Mechanics in ME
If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be

wh
w/h
h
h/w

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