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
When there is no motion of one fluid layer relative to an adjacent layer
only when the fluid is frictionless
irrespective of the motion of one fluid layer relative to an adjacent layer

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP