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Fluid Mechanics

Fluid Mechanics
A lubricant 100 times more viscous than water would have a viscosity (in Pa.s)

10
0.01
0.1
1

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Fluid Mechanics
The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by(where, x = each side of the square duct)

x
x/2
2x
πx

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Fluid Mechanics
Capillary rise of mercury in a small diameter tube is proportional to (where, d = diameter of the tube, σ = surface tension of mercury)

D
1/d
L/σ
Σ

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Fluid Mechanics
In frictional fluid flow, the quantity, P/ρ + V²/2gc + gz/gc, is

None of these
Increased in the direction of flow
Not constant along a streamline
Constant along a streamline

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

Long pipe at constant rate
Expanding tube at constant rate
None of these
Long pipe at decreasing rate

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Fluid Mechanics
Which of the following exemplifies a three dimensional fluid flow ?

None of these
Fluid flow at the inlet to a nozzle
Viscous fluid flow between converging plates
Fluid flow between parallel plates

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