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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When the Mach number is between ___ the flow is called super-sonic flow.

1 and 2.5
4 and 6
1 and 6
2.5 and 4

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Hydraulics and Fluid Mechanics in ME
A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called

Archimedes’s principle
D-Alembert’s principle
Pascal’s law
None of these

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Hydraulics and Fluid Mechanics in ME
In a centrifugal pump, the liquid enters the pump

At the top
At the canter
From sides
At the bottom

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Hydraulics and Fluid Mechanics in ME
The efficiency of power transmission through pipe is (where H = Total supply head, and hf = Head lost due to friction in the pipe)

H/(H + hf )
(H + hf )/H
(H - hf )/H
H/(H - hf )

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Hydraulics and Fluid Mechanics in ME
The volume of a fluid __________ as the pressure increases.

Decreases
Remains same
Increases
None of these

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Hydraulics and Fluid Mechanics in ME
The mass per unit volume of a liquid at a standard temperature and pressure is called

Specific gravity
Specific weight
None of these
Mass density

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