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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as

Potential line
Stream line
Path line
Steak line

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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
Head developed by a centrifugal pump depends on

Impeller diameter
Fluid density
Both (A) and (B) above
Speed

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Hydraulics and Fluid Mechanics in ME
During the opening of a valve in a pipe line, the flow is

Steady
Unsteady
Laminar
Uniform

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Hydraulics and Fluid Mechanics in ME
For very great pressures, viscosity of moss gases and liquids

remains same
increases
shows erratic behaviour
decreases

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Hydraulics and Fluid Mechanics in ME
The specific gravity of an oil whose specific weight is 7.85 kN/m3, is

0.8
1.6
1
1.2

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