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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The eddy viscosity for turbulent flow is

a function of temperature only
independent of the flow
dependent on the flow
a physical property of the fluid.

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Hydraulics and Fluid Mechanics in ME
For centrifugal pump impeller, the maximum value of the vane exit angle is

20° to 25°
25° to 30°
10° to 15°
15° to 20°

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Hydraulics and Fluid Mechanics in ME
The speed of a pressure wave through a pipe depends upon

the viscosity of fluid
the length of pipe
the bulk modulus for the fluid
the original head

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Hydraulics and Fluid Mechanics in ME
Pascal-second is the unit of

pressure
dynamic viscosity
surface tension
kinematic viscosity

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Hydraulics and Fluid Mechanics in ME
A turbine develops 10000 kW under a head of 25 meters at 135 r.p.m. Its specific speed is

275.4 r.p.m
175.4 r.p.m.
215.5 r.p.m.
241.5 r.p.m.

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Hydraulics and Fluid Mechanics in ME
A streamline is defined as the line

parallel to outer surface of pipe
parallel to central axis flow
of equal yelocity in a flow
along which the pressure drop is uniform

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