Fluid Mechanics
A centrifugal pump used to pump water is used to pump an oil with specific gravity of 0.8 at the same rate. The power consumption will now

Remain same
Data insufficient to predict
Increase
Decrease

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Fluid Mechanics
A differential pressure cell is used for

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

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