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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The surface tension of mercury at normal temperature is __________ that of water.

None of these
Same as
Lower than
Higher than

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

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Hydraulics and Fluid Mechanics in ME
The ratio of the inertia force to the __________ is called Euler's number.

Viscous force
Pressure force
Surface tension force
Elastic force

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Hydraulics and Fluid Mechanics in ME
The velocity distribution for laminar flow through a circular tube

varies parabolically with maximum at the centre
None of these
is constant over the cross-section
varies linearly from zero at walls to maximum at centre

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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 weight
Specific gravity

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Hydraulics and Fluid Mechanics in ME
The units of kinematic viscosity are

newton-sec per meter
kg sec/meter
metres² per sec
newton-sec per meter

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