HYDRAULICS & FLUID MECHANICS QUIZ

A perfect gas

has constant viscosity

is incompressible

is of theoretical interest

None 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 friction

force of adhesion

force of diffusion

force of cohesion

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 : ?

Separation of flow occurs when

the cross-section of a channel is reduced

the boundary layer comes to rest

All of these

the pressure intensity reaches a minimum

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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

4.2 M

4.6 M

4.0 M

TRUE ANSWER : ?
YOUR ANSWER : ?

Choose the wrong statement

fluids are capable of flowing

when in equilibrium, fluids can sustain shear forces

fluids conform to the shape of the con-taining vessels

when in equilibrium, fluids cannot sustain tangential forces

TRUE ANSWER : ?
YOUR ANSWER : ?

The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is

1/4

1/3

1/2

2/3

TRUE ANSWER : ?
YOUR ANSWER : ?

Pressure of the order of 10''' torr can be measured by

Micro-manometer

Pirani Gauge

ionisastion gauge

Bourdon tube

TRUE ANSWER : ?
YOUR ANSWER : ?

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

steady flow

uniform flow

incompressible flow

frictionless flow

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YOUR ANSWER : ?

Which of the following instrument can be used for measuring speed of an aeroplane

Orifice plate

rotameter

Venturimeter

pitot tube

TRUE ANSWER : ?
YOUR ANSWER : ?