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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece depends upon

Length of mouthpiece
Pressure of liquid
Velocity of liquid
Area of mouthpiece

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Hydraulics and Fluid Mechanics in ME
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)

Cc/Cr
Cv × Cr
Cc × Cv
Cc × Cr

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Hydraulics and Fluid Mechanics in ME
According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies

Cube of fan speed
Directly as fan speed
Square of fan speed
Square root of fan speed

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Hydraulics and Fluid Mechanics in ME
High specific speed of a pump implies it is

Mixed flow pump
Any one of the above
Axial flow pump
Centrifugal pump

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Hydraulics and Fluid Mechanics in ME
When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis ω rad/s, then depth of parabola which the liquid assumes is

ω.r/4g
ω.r/2g
ω².r²/4g
ω².r²/2g

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Hydraulics and Fluid Mechanics in ME
The Reynold's number of a ship is __________ to its velocity and length.

None of these
Inversely proportional
Directly proportional
Square root of velocity

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