Fluid Mechanics
Check valve provided in the discharge line of a centrifugal pump serves the purpose of controlling the

Back flow of fluid in the event of stoppage of pump
All of these
Flow of liquid during operation of the pump
Discharge pressure

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Fluid Mechanics
A differential pressure cell is used for

Measuring small pressure difference in liquids
Remote recording of pressure difference
Measuring small pressure difference in gases
Measuring the difference of the impact & the static pressure

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