HYDRAULICS & FLUID MECHANICS QUIZ

For a floating body to be in stable equilibrium, its metacentre should be

above the center of buoyancy

above the center of gravity.

between e.g. and center of pressure

below the center of buoyancy

TRUE ANSWER : ?
YOUR ANSWER : ?

In which of the following the friction drag is generally larger than pressure drag?

a cylinder

a sphere

an airfoil

a circular disc or plate held normal to flow

TRUE ANSWER : ?
YOUR ANSWER : ?

When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies

linearly with radial distance

inversely as the square of the radial distance

inversely as the radial distance

as the square of the radial distance

TRUE ANSWER : ?
YOUR ANSWER : ?

A fluid is said to be ideal, if it is

inviscous and compressible

inviscous and incompressible

incompressible

inviscous

TRUE ANSWER : ?
YOUR ANSWER : ?

Specific weight of sea water is more that of pure water because it contains

dissolved salt

dissolved air

suspended matter

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the

force of diffusion

force of adhesion

force of cohesion

force of friction

TRUE ANSWER : ?
YOUR ANSWER : ?

The line of action of the buoyant force acts through the

centroid of the volume of fluid vertically above the body

center of gravity of any submerged body

center of the volume of floating body

centriod of the displaced volume of fluid

TRUE ANSWER : ?
YOUR ANSWER : ?

A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of

4.8 M

4.6 M

4.2 M

4.0 M

TRUE ANSWER : ?
YOUR ANSWER : ?

Ay between two stream lines represents

velocity

pressure

head

discharge

TRUE ANSWER : ?
YOUR ANSWER : ?

When a body floating in a liquid, is displaced slightly, it oscillates about

e.g. of body

metacentre

center of buoyancy

center of pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

↑