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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a

Mouthpiece
Nozzle
Weir
Notch

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

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

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Hydraulics and Fluid Mechanics in ME
In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than

surface friction
All of these
viscosity
frictional force

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Hydraulics and Fluid Mechanics in ME
Re-entrant or Borda's mouthpiece is an __________ mouthpiece.

Internal
External
Both A and B
None of these

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Hydraulics and Fluid Mechanics in ME
The cavitation in a hydraulic machine

Reduces the discharge of a turbine
All of these
Causes sudden drop in power output and efficiency
Causes noise and vibration of various parts

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Hydraulics and Fluid Mechanics in ME
In a static fluid

Fluid pressure is zero
Linear deformation is small
Only normal stresses can exist
Resistance to shear stress is small

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