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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
A large Roynold number is indication of

LAMINAR FLOW
turbulent flow
smooth and streamline flow
highly turbulent flow.

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

Pirani Gauge
ionisastion gauge
Micro-manometer
Bourdon tube

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Hydraulics & Fluid Mechanics
According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to

weight of the fluid displaced by the body
less than the weight of the body
more than the weight of the body
the weight of the body

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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

337.5
300
600
675

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Hydraulics & Fluid Mechanics
Drag force is a function of i) projected area of the body ii) mass density of the fluid iii) velocity of the body The correct answer is

(i) and (ii)
(i) and (iii)
(i), (ii) and (iii)
(ii) and (iii)

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Hydraulics & Fluid Mechanics
The Prartdtl mixing length is

zero at the pipe wall
independent of shear stress
maximum at the pipe wall
None of these

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