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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid)

wH/2
wH2/4
wH2/2
wH

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Hydraulics and Fluid Mechanics in ME
Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of

0.848
0.392
0.688
0.492

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Hydraulics and Fluid Mechanics in ME
For hypersonic flow, the Mach number is

unity
greater than 2
greater than unity
greater than 4

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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

One dimensional flow
Turbulent flow
Uniform flow
Steady flow

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Hydraulics and Fluid Mechanics in ME
The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

Develops unit power under unit speed
Delivers unit discharge under unit head
Develops unit power under unit head
Delivers unit discharge under unit speed

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Hydraulics and Fluid Mechanics in ME
In case of an airfoil, the separation of flow occurs

at the extreme front of body
at the extreme rear of body
any where between rear and front of body depending upon Reynolds number
midway between rear and front of body

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