Hydraulics and Fluid Mechanics in ME
A floating body is said to be in a state of stable equilibrium

when the metacentre is below the centre of gravity
only when its centre of gravity is below its centre of buoyancy
when the metacentre is above the centre of gravity
when its metacentric height is zero

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe or channel is said to be uniform when

The liquid particles at all sections have the same velocities
Each liquid particle has a definite path
The quantity of liquid flowing per second is constant
The liquid particles at different sections have different velocities

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Hydraulics and Fluid Mechanics in ME
Mechanical efficiency of a centrifugal pump is the ratio of

Manometric head to the energy supplied by the impeller per kN of water
Actual work-done by the pump to the energy supplied to the pump by the prime mover
Energy available at the impeller to the energy supplied to the pump by the prime mover
Energy supplied to the pump to the energy available at the impeller

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