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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following turbine is preferred for 0 to 25 m head of water?

None of these
Kaplan turbine
Francis turbine
Pelton wheel

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Hydraulics and Fluid Mechanics in ME
In a free nappe,

The pressure below the nappe is atmospheric
The pressure above the nappe is negative
The pressure below the nappe is negative
The pressure above the nappe is atmospheric

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Hydraulics and Fluid Mechanics in ME
Motion of a liquid in a volute casing of a centrifugal pump is an example of

Rotational flow
Radial
Forced spiral vortex flow
Spiral vortex flow

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Hydraulics and Fluid Mechanics in ME
An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be __________ to the acceleration of the tank.

Inversely proportional
Equal to
None of these
Directly proportional

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Hydraulics and Fluid Mechanics in ME
The unit speed of the turbine runner is

N/H²
N/H3/2
N/H
N/√H

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Hydraulics and Fluid Mechanics in ME
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

(2AH₁)/(Cd × a√2g)
(2A√H₁)/(Cd × a√2g)
(2AH₁3/2)/(Cd × a√2g)
(2AH₁²)/(Cd × a√2g)

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