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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The flow in a pipe is neither laminar nor turbulent when Reynold number is

More than 2800
None of these
Less than 2000
Between 2000 and 2800

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Hydraulics and Fluid Mechanics in ME
When the Mach number is more than 6, the flow is called

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

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

ρ ω2 r2/4
ρ ω2 r2
2ρ ω2 r2
ρ ω2 r2/2

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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

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

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Hydraulics and Fluid Mechanics in ME
The maximum number of jets generally employed in impulse turbine without jet interference is

8
4
6
12

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Hydraulics and Fluid Mechanics in ME
When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of

An ellipse
A triangle
None of these
A paraboloid

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