Fluid Mechanics
The pressure drop per unit length of pipe incurred by a fluid 'X' flowing through pipe is Δp. If another fluid 'Y' having both the specific gravity & density just double of that of fluid 'X', flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be

Δp²
2Δp
Δp/2
Δp

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Fluid Mechanics
Steady flow occurs, when the

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

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Fluid Mechanics
Vane anemometer

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

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