Fluid Mechanics
Interstage coolers are provided in a multistage compressor to

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

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Fluid Mechanics
Steady flow occurs, when the

Conditions are the same at the adjacent points at any instant
Rate of the velocity change is constant
Conditions change steadily with time
Conditions do not change with time at any point

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