Hydraulics & Fluid Mechanics
A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of

4.8 M
4.0 M
4.2 M
4.6 M

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Hydraulics & Fluid Mechanics
Steady flow occurs when

the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
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 magnitude and direction of the velocity do not change from point to point in the fluid

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Hydraulics & Fluid Mechanics
Fluid is a substance that

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

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

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

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