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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which place in hydraulic turbine is most susceptible for cavitations?

Penstock
Blade inlet
Inlet of draft rube
Guide blade

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Hydraulics and Fluid Mechanics in ME
In steady flow of a fluid, the total accele ration of any fluid particle

can be zero
is never zero
is independent of coordinates
is always zero

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Hydraulics and Fluid Mechanics in ME
A balloon lifting in air follows the following principle

Archimedes principle
All of these
principle of buoyancy
law of gravitation

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Hydraulics and Fluid Mechanics in ME
The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called

Density of liquid
Compressibility of liquid
Surface tension of liquid
Specific gravity of liquid

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Hydraulics and Fluid Mechanics in ME
The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.

Ax̅ / IG below
IG / Ax̅ above
Ax̅ / IG above
IG / Ax̅ below

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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

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

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