## Hydraulics & Fluid Mechanics Fluid is a substance that

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

surface tension
friction
cohesion
viscosity

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

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

## Hydraulics & Fluid Mechanics For a floating body to be in equilibrium

meta center should be above e.g.
All of these
center of buoyancy and e.g. must lie on same vertical plane
a righting couple should be formed

H/2
2 H/3
H/3
2 H/5

## Hydraulics & Fluid Mechanics According to Bernoulli’s equation for steady ideal fluid flow

velocity and pressure are inversely proportional
the energy is constant along a stream-line but may vary across streamlines
total energy is constant throughout
principle of conservation of mass holds