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Fluid Mechanics

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

0.1
1
0.01
10

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

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

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Fluid Mechanics
The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop fo __________ fluid.

Pseudoplastic
Newtonion
Bingham plastic
Dilatant

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Fluid Mechanics
Rise of liquid in a capillary tube is due to

Adhesion
Cohesion
Both A & B
Neither A nor B

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Fluid Mechanics
If two capillary tubes of dia 0.5 mm and 1 mm are dipped in a pot containing mercury, then the rise of mercury is

Greater in 0.5 mm dia tube
Zero in both the tubes
Same in both the tubes
Greater in 1 mm dia tube

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Fluid Mechanics
The ratio of inertial forces to elastic forces is called the __________ number.

Euler
Mach
Reynolds
Weber

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