Hydraulics and Fluid Mechanics in ME
The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

Volumetric efficiency
Mechanical efficiency
Manometric efficiency
Overall efficiency

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Hydraulics and Fluid Mechanics in ME
Venturimeter is used to

Measure the velocity of a flowing liquid
Measure the discharge of liquid flowing in a pipe
Measure the pressure difference of liquid flowing between two points in a pipe line
Measure the pressure of a flowing liquid

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