## Fluid Mechanics Euler's equation of motion is a statement expressing

Conservation of mass
Newton's second law of motion
Conservation of energy
Newton's first law of motion

## Fluid Mechanics Net positive suction head (NPSH) of a centrifugal pump must be

Greater than the vapour pressure of the liquid
Less than the vapour pressure of the liquid
Less than barometric pressure
Equal to the vapour pressure of the liquid

2Δp
Δp²
Δp/2
Δp

## Fluid Mechanics The normal stress is the same in all directions at a point in a fluid, when the fluid is

Incompressible
Non-viscous
Both A and B
Having no motion of one fluid layer relative to the other

## Fluid Mechanics The continuity equation

Stipulates that Newton's second law of motion must be satisfied at every point in the fluid
None of these
Relates mass flow rate along a stream tube
Relates work and energy

## Fluid Mechanics Pressure gradient in the pipe flow is influenced by the

Density & viscosity of the fluid
Diameter of pipe
Velocity of the fluid
All of these