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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
A large Roynold number is indication of

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

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Hydraulics & Fluid Mechanics
THE THEORETICAL VALUE OF COEFFICIENT OF CONTRACTION OF A SHARP EDGED ORIFICE IS

0.95
1.01
0.611
0.86

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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

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

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Hydraulics & Fluid Mechanics
To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than

2.4 m above the hydraulic gradient
10.0 m above the hydraulic gradient
6.4 m above the hydraulic gradient
5.0 above the hydraulic gradient

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

rotameter
Venturimeter
pitot tube
Orifice plate

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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
337.5
675

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