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Fluid Mechanics

Fluid Mechanics
Lower BWG means __________ of the tube.

Inner diameter
Lower thickness
Lower cross-section
Outer diameter

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Fluid Mechanics
__________ is an example of axial flow impeller.

Paddle
All of these
Propeller
Turbine

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Fluid Mechanics
Water is flowing at 1 m/sec through a pipe (of 10 cm I.D) with a right angle bend. The force in Newtons exerted on the bend by water is

10√2π
5π/2
5√2π
5π/√2

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Fluid Mechanics
Unsteady uniform flow is represented by flow through a/an

Expanding tube at constant rate
Expanding tube at increasing rate
Long pipe at constant rate
Long pipe at decreasing rate

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Fluid Mechanics
As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1

Increases linearly with V
Decreases as V²
Decreases linearly with V
None of these

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Fluid Mechanics
Boundary layer thickness in laminar flow over a flat plate increases as(where, d = distance from the leading edge.)

d2/3
√d
d2
d1/3

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