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

irrespective of the motion of one fluid layer relative to an adjacent layer
only when the fluid is frictionless
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
Steady flow occurs when

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

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

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Hydraulics & Fluid Mechanics
The horizontal component of force on a curved surface is equal to the

weight of liquid vertically above the curved surface
force on a vertical projection of the curved surface
force on the horizontal projection of the curved surface
product of pressure intensity at its centroid and area

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