Fluid Mechanics
Vane anemometer

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

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Fluid Mechanics
A stream line is

Drawn normal to the velocity vector at every point
Always the path of particle
A line connecting the mid points of flow cross-section
Fixed in space in steady flow

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