Fluid Mechanics
Net positive suction head (NPSH) of a centrifugal pump must be

Greater than the vapour pressure of the liquid
Less than barometric pressure
Less than the vapour pressure of the liquid
Equal to the vapour pressure of the liquid

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Fluid Mechanics
Vane anemometer

None of these
Is an area meter
Rotates an element at a speed determined by the velocity of the fluid in which the meter is immersed
Is a variable head meter

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