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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.

Remain same
Increases
Decreases
None of these

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Hydraulics and Fluid Mechanics in ME
The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by

[2(Vr + v) v]/ Vr²
[(Vr - v) v]/ Vr
[(Vr + v) v]/ Vr
[2(Vr - v) v]/ Vr²

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Hydraulics and Fluid Mechanics in ME
According to Bernoulli's equation

Z + p/w - v²/2g = constant
Z - p/w + v²/2g = constant
Z - p/w - v²/2g = constant
Z + p/w + v²/2g = constant

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Hydraulics and Fluid Mechanics in ME
The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.

None of these
Equal to
Less than
More than

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Hydraulics and Fluid Mechanics in ME
Cavitation is caused by

high pressure
high velocity
low pressure
weak material

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Hydraulics and Fluid Mechanics in ME
During the opening of a valve in a pipe line, the flow is

Laminar
Uniform
Unsteady
Steady

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