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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The angle of taper on draft tube is

Less than 8°
Greater than 8°
Greater than 15°
Greater than 5°

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Hydraulics and Fluid Mechanics in ME
Capillary action is due to the

Adhesion of the liquid molecules and the molecules on the surface of a solid
Cohesion of the liquid
All of the listed here
Surface tension

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Hydraulics and Fluid Mechanics in ME
The angle of contact in case of a liquid depends upon

the nature of the liquid and the solid
the material which exists above the free surface of the liquid
any one of the above
both of die above

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Hydraulics and Fluid Mechanics in ME
Casting of a centrifugal pump is designed so as to minimize

Loss of kinetic energy
Friction loss
Cavitations
Static head

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Hydraulics and Fluid Mechanics in ME
A jet of water is striking at the centre of a curved vane moving with a uniform velocity in the direction of jet. For the maximum efficiency, the vane velocity is ________ of the jet velocity

One-half
One-third
Three-fourth
Two-third

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Hydraulics and Fluid Mechanics in ME
The tendency of a liquid surface to contract is due to the following property

surface tension
cohesion
adhesion
viscosity

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