Hydraulics and Fluid Mechanics in ME
A hydraulic intensifier normally consists of

A cylinder and a ram
Two coaxial rams and two cylinders
A cylinder, a piston, storage tank and control valve
Two cylinders, two rams and a storage device

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

when its metacentric height is zero
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

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