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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

Normal speed
Specific speed
None of these
Unit speed

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Hydraulics and Fluid Mechanics in ME
Hydraulic accumulator is used for

Accumulating oil
Generally high pressures to operate hydraulic machines
Supplying energy when main supply fails
Supplying large quantities of oil for very short duration

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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
Designing new impeller
Not possible
Trimming the impeller size to the required size by machining

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Hydraulics and Fluid Mechanics in ME
The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface.

Directly proportional
Inversely proportional
None of these
Equal

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Hydraulics and Fluid Mechanics in ME
When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called

Archimedes’s principle
Bernoulli’s theorem
Principle of flotation
Pascal’s law

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Hydraulics and Fluid Mechanics in ME
A metal with specific gravity of 'a' floating in a fluid of same specific gravity 'a' will

Be fully immersed with top surface at fluid surface
Partly immersed
Sink to bottom
Float over fluid

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