Fluid Mechanics
Interstage coolers are provided in a multistage compressor to

Cool the delivered air
Achieve the exact delivery pressure
None of these
Save power in compressing a given volume to a given pressure

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Fluid Mechanics
A differential pressure cell is used for

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

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