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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following instrument can be used for measuring speed of a submarine moving in deep sea

hot wire anemometer
rotameter
Venturimeter
pitot tube

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

Double
Sixteen times
Eight times
Four times

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Hydraulics and Fluid Mechanics in ME
The ratio of the inertia force to the elastic force is called

Weber's number
Froude's number
Reynold's number
Mach number

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Hydraulics and Fluid Mechanics in ME
If the surface of liquid is convex, men

There is no cohesion pressure
Cohesion pressure is increased
Cohesion pressure is decreased
Cohesion pressure is negligible

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Hydraulics and Fluid Mechanics in ME
Stream lines and path lines always coincide in case of

laminar flow
turbulent flow
steady flow
uniform flow

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

viscosity
surface tension
cohesion
adhesion

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