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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)

w/h
h/w
wh
w

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Hydraulics and Fluid Mechanics in ME
Newton’s law of viscosity relates

shear stress and rate of angular deformation
intensity of pressure and rate of angular deformation
viscosity and rate of angular deformation
shear stress, viscosity and temperature

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Hydraulics and Fluid Mechanics in ME
For pipes, laminar flow occurs when Reynolds number is

Less than 2000
More than 4000
Between 2000 and 4000
Less than 4000

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Hydraulics and Fluid Mechanics in ME
A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit discharge of wheel is

0.25 m3/s
0.5 m3/s
1.5 m3/s
2.5 m3/s

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Hydraulics and Fluid Mechanics in ME
The point at which the resultant pressure on an immersed surface acts, is known as

Centre of depth
Centre of gravity
Centre of pressure
Centre of immersed surface

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Hydraulics and Fluid Mechanics in ME
The velocity of jet of water travelling out of opening in a tank filled with water is proportional to

h2
h2
head of water (h)
V/T

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