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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The Francis formula for the discharge over Cipoletti weir is

1.84 LH1/2
1.84 LH5/2
1.84 LH3/2
1.84 LH

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Hydraulics and Fluid Mechanics in ME
Flow occurring in a pipeline when a valve is being opened is

vortex
unsteady
laminar
steady

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Hydraulics and Fluid Mechanics in ME
In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by

Not possible
Designing new impeller
Trimming the impeller size to the required size by machining
Some other alterations in the impeller

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Hydraulics and Fluid Mechanics in ME
In a centrifugal pump casing, the flow of water leaving the impeller, is

Forced vortex
Radial flow
Rectilinear flow
Free vortex motion

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Hydraulics and Fluid Mechanics in ME
When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid

Falls on the back end
Remains horizontal
Falls on the front end
Becomes curved

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

Less than unity
Between 1 and 6
Unity
None of these

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