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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The center of gravity of the volume of the liquid displaced by an immersed body is called

center of pressure
center of gravity
center of buoyancy
metacentre

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Hydraulics and Fluid Mechanics in ME
An ideal flow of any fluid must fulfill the following

Pascal’ law
Newton’s law of viscosity
Newton’s law of motion
Continuity equation

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Hydraulics and Fluid Mechanics in ME
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is

0.884
0.848
0.392
0.488

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Hydraulics and Fluid Mechanics in ME
If the net positive suction head (NPSH) requirement for the pump is not satisfied, then

Efficiency will be low
Cavitation will be formed
No flow will take place
Excessive power will be consumed

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Hydraulics and Fluid Mechanics in ME
Air vessels in reciprocating pump are used to

Save pump from cavitations
Reduce acceleration to minimum
Increase pump efficiency
Smoothen flow

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Hydraulics and Fluid Mechanics in ME
The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.

The bodies A and B have equal stability
The bodies A and B are unstable
The body B is more stable than body A
The body A is more stable than body B

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