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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The gross or total head of the turbine is the ___________ of the water levels at the head race and tail race.

Difference
None of these
Product
Sum

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Hydraulics and Fluid Mechanics in ME
The flow ratio in case of Francis turbine varies from

1 to 1.5
0.6 to 0.9
0.4 to 0.5
0.15 to 0.3

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is successfully used for lifting water from deep wells?

Reciprocating pump
Air lift pump
Jet pump
Centrifugal pump

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Hydraulics and Fluid Mechanics in ME
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.

Geometric mean
Sum
Arithmetic mean
Difference

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

ρ ω2 r2
ρ ω2 r2/4
2ρ ω2 r2
ρ ω2 r2/2

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Hydraulics and Fluid Mechanics in ME
The process of diffusion of one liquid into the other through a semi-permeable membrane is called

viscosity
surface tension
cohesion
osmosis

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