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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The specific weight of water in S.I. units is taken as

9.81 × 10-6 N/mm3
9.81 × 103 N/m3
Any one of these
9.81 kN/m3

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Hydraulics and Fluid Mechanics in ME
When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface.

Convex
Plane
None of these
Concave

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Hydraulics and Fluid Mechanics in ME
The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

μ π³ N² R² /1800 t
μ π³ N² R⁴ /1800 t
μ π³ N² R⁴ /3600 t
μ π³ N² R² /3600 t

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Hydraulics and Fluid Mechanics in ME
A Francis turbine is used when the available head of water is

0 to 25 m
None of these
Above 250 m
25 m to 250 m

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Hydraulics and Fluid Mechanics in ME
The normal stress in a fluid will be constant in all directions at a point only if

It has zero viscosity
It has uniform viscosity
It is incompressible
It is at rest

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Hydraulics and Fluid Mechanics in ME
The mass per unit volume of a liquid at a standard temperature and pressure is called

Mass density
None of these
Specific gravity
Specific weight

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