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Fluid Mechanics

Fluid Mechanics
Lower BWG means __________ of the tube.

Lower thickness
Outer diameter
Inner diameter
Lower cross-section

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Fluid Mechanics
Velocity at a certain point in case of streamline flow is

Independent of time
Neither A nor B
Constant
Both A & B

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Fluid Mechanics
The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.

None of these
Newtonion
Bingham
Perfect

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

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

0.1
1
10
0.01

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Fluid Mechanics
For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance).

V/Vmax = (r/x)1/7
None of these
V/Vmax = (x/r)1/7
V/Vmax = (x.r)1/7

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