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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For manometer, a better liquid combination is one having

high density and viscosity
surface tension is no criterion
higher surface tension
lower surface tension

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Hydraulics and Fluid Mechanics in ME
The center of gravity of the volume of the liquid displaced by an immersed body is called

center of buoyancy
center of gravity
metacentre
center of pressure

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Hydraulics and Fluid Mechanics in ME
The variation in the volume of a liquid with the variation of pressure is called its

Viscosity
Surface tension
Capillarity
Compressibility

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Hydraulics and Fluid Mechanics in ME
The most efficient section of a channel is

Rectangular
Trapezoidal
Square
Triangular

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Hydraulics and Fluid Mechanics in ME
The overall efficiency for a Pelton wheel lies between

0.50 to 0.65
0.65 to 0.75
0.75 to 0.85
0.85 to 0.90

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Hydraulics and Fluid Mechanics in ME
The depth ā€˜d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be (where D is the depth of flow)

0.707 D
0.423 D
0.577 D
0.223 D

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