## 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 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
the direction and magnitude of the velocity at all points are identical

specific density
specific gravity
specific weight
specific mass

1.01
0.86
0.95
0.611

## Hydraulics & Fluid Mechanics An open vessel of water is accelerated up an inclined plane. The free water surface will

make an angle in opposite direction to inclination of inclined plane
be horizontal
any one of above is possible
make an angle in direction of inclination of inclined plane

## Hydraulics & Fluid Mechanics To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than

6.4 m above the hydraulic gradient
5.0 above the hydraulic gradient
2.4 m above the hydraulic gradient
10.0 m above the hydraulic gradient

## Hydraulics & Fluid Mechanics Uniform flow occurs when

size and cross section change uniformly along length
size and shape of the cross section in a particular length remain constant
the flow is streamline
the flow is steady