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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The horizontal component of buoyant force is

Zero
None of these
Same as buoyant force
Negligible

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Hydraulics and Fluid Mechanics in ME
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

Could be any value
Minimum
Maximum
Zero

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

sudden enlargement
gradual contraction or enlargement
sudden contraction
friction

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Hydraulics and Fluid Mechanics in ME
When the Mach number is less than unity, the flow is called

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

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Hydraulics and Fluid Mechanics in ME
Casting of a centrifugal pump is designed so as to minimize

Loss of kinetic energy
Static head
Cavitations
Friction loss

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Hydraulics and Fluid Mechanics in ME
Centre of buoyancy always

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

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