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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A flow is called sub-sonic, if the Mach number is

Between 1 and 6
Less than unity
Unity
More than 6

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Hydraulics and Fluid Mechanics in ME
Low specific speed of turbine implies it is

Impulse turbine
Any one of the above
Francis turbine
Propeller turbine

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

None of these
Decreases
Increases
Remains same

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Hydraulics and Fluid Mechanics in ME
A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)

4wd/σ cosα
σ cosα/4wd
4σ cosα/wd
wd/4σ cosα

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Hydraulics and Fluid Mechanics in ME
The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.

None of these
More than
Less than
Equal to

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Hydraulics and Fluid Mechanics in ME
The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is

Slow speed pump with radial flow at outlet
Medium speed pump with radial flow at outlet
High speed pump with radial flow at outlet
High speed pump with axial flow at outlet

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