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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the submerged body is called

Metacentre
Reaction
Up-thrust
Buoyancy

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Hydraulics and Fluid Mechanics in ME
Center of buoyancy is the

does not exist
center of pressure of displaced volume
e.g. of floating body
centroid of the displaced volume of fluid

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Hydraulics and Fluid Mechanics in ME
If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water

52.2 cm
50 cm
52 cm
51 cm

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Hydraulics and Fluid Mechanics in ME
Cavitation is caused by

high velocity
low pressure
weak material
high pressure

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Hydraulics and Fluid Mechanics in ME
The most efficient section of a channel is

Square
Rectangular
Triangular
Trapezoidal

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Hydraulics and Fluid Mechanics in ME
A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is

0.36
0.26
0.56
0.46

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