Fluid Mechanics
If three pipes of different diameters, lengths & friction factors are connected in parallel, then (where, Q = flow rate, V= fluid velocity f = friction factor).

V₁ = V₂ = V₃
Q = Q₁ + Q₂ + Q₃
F = f₁ + f₂ + f₃
Q₁ = Q₂ = Q₃

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Fluid Mechanics
Vane anemometer

Is an area meter
None of these
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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