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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be

300
600
675
337.5

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Hydraulics & Fluid Mechanics
The region between the separation streamline and the boundary surface of the solid body is known as

boundary layer
wake
lift
drag

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Hydraulics & Fluid Mechanics
For a floating body to be in stable equilibrium, its metacentre should be

above the center of gravity.
below the center of buoyancy
above the center of buoyancy
between e.g. and center of pressure

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Hydraulics & Fluid Mechanics
A perfect gas

is incompressible
None of these
is of theoretical interest
has constant viscosity

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Hydraulics & Fluid Mechanics
Pressure of the order of 10''' torr can be measured by

Micro-manometer
Bourdon tube
Pirani Gauge
ionisastion gauge

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Hydraulics & Fluid Mechanics
Which of the following instrument can be used for measuring speed of an aeroplane

Venturimeter
Orifice plate
rotameter
pitot tube

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