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Fluid Mechanics

Fluid Mechanics
What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate?

1.5
1
0.5
2

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Fluid Mechanics
Which of the following produces maximum pressure difference for transportation of gases?

Blowers
Compressors
Vaccum pumps
Fans

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Fluid Mechanics
Lower BWG means __________ of the tube.

Inner diameter
Outer diameter
Lower thickness
Lower cross-section

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Fluid Mechanics
Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the

Neither A nor B
Pressure
Both A & B
Temperature

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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

2Δp
Δp
Δp/2
Δp²

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Fluid Mechanics
Path followed by water jet issuing from the bottom of a water tank will be a

Parabola (vertex being at the opening)
Horizontal straight line
Hyperbola
Zig-zag path (which is geometrically undefined)

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