Hydraulics & Fluid Mechanics
The normal stress is same in all directions at a point in a fluid

only when the fluid is frictionless
irrespective of the motion of one fluid layer relative to an adjacent layer
When there is no motion of one fluid layer relative to an adjacent layer
only when the fluid is incompressible and has zero viscosity

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Hydraulics & Fluid Mechanics
Metacentric height is given as the distance between

the center of gravity of the body and the center of buoyancy
center of buoyancy and metacentre
the center of gravity of the body andthe meta center
the center of gravity of the body and the center of pressure

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Hydraulics & Fluid Mechanics
Fluid is a substance that

has the same shear stress.at a point regardless of its motion
cannot be subjected to shear forces
always expands until it fills any container
cannot remain at rest under action of any shear force

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Hydraulics & Fluid Mechanics
Steady flow occurs when

the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time
the direction and magnitude of the velocity at all points are identical
the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
the magnitude and direction of the velocity do not change from point to point in the fluid

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