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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A Piezometer tube is used only for measuring

Vacuum pressure
Low pressure
Moderate pressure
High pressure

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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
Designing new impeller
Some other alterations in the impeller
Not possible

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Hydraulics and Fluid Mechanics in ME
The major loss of energy in long pipes is due to

sudden enlargement
sudden contraction
friction
gradual contraction or enlargement

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Hydraulics and Fluid Mechanics in ME
The surface tension of mercury at normal temperature is __________ that of water.

None of these
Same as
Lower than
Higher than

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Hydraulics and Fluid Mechanics in ME
Centre of buoyancy always

remains below the centre of gravity
coincides with the centre of gravity
remains above the centre of gravity
coincides with the centroid of the volume of fluid displaced

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Hydraulics and Fluid Mechanics in ME
A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.

Equal to
None of these
Less than
More than

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