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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following pump is successfully used for lifting water to the turbines?

Jet pump
Reciprocating pump
Centrifugal pump
Air lift pump

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Hydraulics and Fluid Mechanics in ME
The rise or depression of liquid in a tube due to surface tension will increase in size of tube will

Remain unaffected
Increase
May increase or decrease depending on the characteristics of liquid
Decrease

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Hydraulics and Fluid Mechanics in ME
Which of the following instruments is used to measure flow on the application of Bernoulli’s theorem

pitot tube
Venturimeter
All of these
Orifice plate

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Hydraulics and Fluid Mechanics in ME
The efficiency of power transmission through pipe is (where H = Total supply head, and hf = Head lost due to friction in the pipe)

H/(H + hf )
(H - hf )/H
(H + hf )/H
H/(H - hf )

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

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

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Hydraulics and Fluid Mechanics in ME
Newton’s law of viscosity relates

viscosity and rate of angular deformation
shear stress, viscosity and temperature
shear stress and rate of angular deformation
intensity of pressure and rate of angular deformation

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