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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The velocity at which the laminar flow stops, is known as

None of these
Lower critical velocity
Higher critical velocity
Velocity of approach

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Hydraulics and Fluid Mechanics in ME
A pressure of 25 m of head of water is equal to

2500 kN/m2
245 kN/m2
25 kN/m2
2.5 kN/m2

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Hydraulics and Fluid Mechanics in ME
The overall efficiency for a Pelton wheel lies between

0.75 to 0.85
0.85 to 0.90
0.50 to 0.65
0.65 to 0.75

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Hydraulics and Fluid Mechanics in ME
The wake

always occurs before a separation point
is a region of high pressure intensity
None of these
always occurs after a separation point

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Hydraulics and Fluid Mechanics in ME
The flow in which the particles of a fluid attain such velocities that varies from point to point in magnitude and direction as well as from instant to instant, is known as

Steady flow
Uniform flow
Turbulent flow
One dimensional flow

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe is turbulent when Reynold number is

Less than 2000
None of these
Between 2000 and 2800
More than 2800

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