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Hydraulics & Fluid Mechanics

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

Bourdon tube
ionisastion gauge
Micro-manometer
Pirani Gauge

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Hydraulics & Fluid Mechanics
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid (where pi and p2 are mass densities.)

uniform flow
incompressible flow
steady flow
frictionless flow

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Hydraulics & Fluid Mechanics
Uniform flow occurs when

the flow is streamline
the flow is steady
size and cross section change uniformly along length
size and shape of the cross section in a particular length remain constant

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Hydraulics & Fluid Mechanics
The increase in meta centric height i) increases stability ii) decreases stability iii) increases comfort for passengers iv) decreases comfort for passengers The correct answer is

(i) and (iii)
(ii) and (iv)
(ii) and (iii)
(i) and (iv)

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

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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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