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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be

Double
Four times
Sixteen times
Eight times

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Hydraulics and Fluid Mechanics in ME
If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is

0.5
None of these
0.25
1

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Hydraulics and Fluid Mechanics in ME
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

Could be any value
Maximum
Minimum
Zero

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Hydraulics and Fluid Mechanics in ME
Mercury does not wet glass. This is due to property of liquid known as

surface tension
viscosity
adhesion
cohesion

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Hydraulics and Fluid Mechanics in ME
A nozzle is generally made of

Convergent shape
Convergent-divergent shape
Cylindrical shape
Divergent shape

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Hydraulics and Fluid Mechanics in ME
The viscosity of a liquid __________ its rate of flow through a hole in a vessel.

Does not effect
Effects
None of these
Both A and B

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