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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

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

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

Jet pump
Centrifugal pump
Reciprocating pump
Air lift pump

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Hydraulics and Fluid Mechanics in ME
The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

(1 - cos φ)/2
(1 - sin φ)/2
(1 + cos φ)/2
(1 + sin φ)/2

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Hydraulics and Fluid Mechanics in ME
For starting an axial flow pump, its delivery valve should be

Open
Depends on starting condition and flow desired
Could be either open or closed
Closed

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Hydraulics and Fluid Mechanics in ME
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is

a function of Reynolds number and relative roughness
dependent only on Reynolds number
dependent on relative roughness only
constant

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Hydraulics and Fluid Mechanics in ME
Kinematic similarity is said to exist between the model and the prototype, if both of them

Have identical velocities
Are equal in size and shape
Have identical forces
Are identical in shape, but differ only in size

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