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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When the Mach number is less than unity, the flow is called

Super-sonic flow
Sub-sonic flow
Sonic flow
Hyper-sonic flow

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Hydraulics and Fluid Mechanics in ME
An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of

0.8
1.2
1
0.75

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Hydraulics and Fluid Mechanics in ME
The intensity of pressure on an immersed surface __________ with the increase in depth.

Decreases
Does not change
None of these
Increases

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Hydraulics and Fluid Mechanics in ME
To avoid an interruption in the flow of a syphon, an air vessel is provided

ay nay point between inlet and outlet
at the outlet
at the inlet
at the summit

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Hydraulics and Fluid Mechanics in ME
The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcy’s coefficient of friction for pipe, and l = Length of pipe)

d = (D⁵/8fl)1/5
d = (D⁵/8fl)1/3
d = (D⁵/8fl)1/4
d = (D⁵/8fl)1/2

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Hydraulics and Fluid Mechanics in ME
The specific speed of a turbine is given by the equation

N√P / H3/2
N√P / H3
N√P / H5/4
N√P / H²

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