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Hydraulics and Fluid Mechanics in ME

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

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

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Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

surface tension forces
air resistance
viscosity
atmospheric pressure

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Hydraulics and Fluid Mechanics in ME
The center of pressure of a surface subjected to fluid pressure is the point

on the surface at which gravitational force acis
similar to metacentre
at which all hydraulic forces meet
on the surface at which resultant pres-sure acts

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is generally used to pump highly viscous fluid?

Air lift pump
Screw pump
Centrifugal pump
Reciprocating pump

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Hydraulics and Fluid Mechanics in ME
Liquids transmit pressure equally in all the directions. This is according to

Boyle's law
Archimedes principle
Newton's formula
Pascal's law

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Hydraulics and Fluid Mechanics in ME
Viscosity of water in comparison to mercury is

Same
Higher
Lower
Higher/lower depending on temperature

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