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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

675
337.5
300
600

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Hydraulics & Fluid Mechanics
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is

33 M/SEC
40 M/SEC
22.5 M/SEC
50 M/SEC

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Hydraulics & Fluid Mechanics
Flow of water in a pipe about 3 meters in diameter can be measured by

venturi
orifice plate
pitot tube
rotameter

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Hydraulics & Fluid Mechanics
The difference of pressure between the inside and outside of a liquid drop is

(a)p = Txr
(d)p = 2T/r
p = T/2r
(b)p = T/r

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Hydraulics & Fluid Mechanics
Separation of flow occurs when

the cross-section of a channel is reduced
the pressure intensity reaches a minimum
the boundary layer comes to rest
All of these

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

drag
boundary layer
wake
lift

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