Fluid Mechanics
Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics.

Gear
Sump
Positive displacement
Piston

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Fluid Mechanics
Steady flow occurs, when the

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

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