## Hydraulics & Fluid Mechanics A perfect gas

is of theoretical interest
has constant viscosity
is incompressible
None of these

## Hydraulics & Fluid Mechanics Pressure of the order of 10''' torr can be measured by

Micro-manometer
Bourdon tube
ionisastion gauge
Pirani Gauge

viscosity
surface tension
cohesion
friction

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

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

## Hydraulics & Fluid Mechanics Two dimensional flow occurs when

the magnitude and direction of the velocity do not change from point to point in the fluid
the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
the direction and magnitude of the velocity at all points are identical
the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

9810 PA
91 PA
981 PA
1 PA