## Hydraulics & Fluid Mechanics The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is

at the centroid of the submerged area
None of these
always above the centroid of the area
always below the centroid of the area

## Hydraulics & Fluid Mechanics The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid (where pi and p2 are mass densities.)

uniform flow
incompressible flow
frictionless flow

## Hydraulics & Fluid Mechanics To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than

6.4 m above the hydraulic gradient
2.4 m above the hydraulic gradient
10.0 m above the hydraulic gradient

## Hydraulics & Fluid Mechanics When a body floating in a liquid, is displaced slightly, it oscillates about

e.g. of body
center of buoyancy
metacentre
center of pressure

## Hydraulics & Fluid Mechanics If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is

200
between 1 and 100
less than 1
160