## Hydraulics & Fluid Mechanics The resultant of all normal pressures acts

at e.g. of body
at metacentre
vertically upwards
at center of pressure

## Hydraulics & Fluid Mechanics In which of the following the friction drag is generally larger than pressure drag?

an airfoil
a sphere
a cylinder
a circular disc or plate held normal to flow

## Hydraulics & Fluid Mechanics A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will

increase
remain same
increase/decrease depending on depth of immersion
decrease

## Hydraulics & Fluid Mechanics At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

negative value
could be any value
maximum
minimum

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