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Hydraulics and Fluid Mechanics in ME

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

Impulse turbine
Propeller turbine
Francis turbine
Any one of the above

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Hydraulics and Fluid Mechanics in ME
The intensity of pressure on an immersed surface __________ with the increase in depth.

Increases
Does not change
None of these
Decreases

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

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

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Hydraulics and Fluid Mechanics in ME
A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is

27,000 kg
13,500 kg
9,000 kg
18,000 kg

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Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of the fluid on an immersed body is called

all the above are correct
upthrust
center of pressure
buoyancy

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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

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

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