HYDRAULICS & FLUID MECHANICS QUIZ

Select the correct statement

A barometer reads the difference be-tween local and standard atmospheric pressure

Local atmospheric pressure is always below standard atmospheric pressure

Standard atmospheric pressure is the mean local atmospheric pressure a* sea level

Local atmospheric pressure depends upon elevation of locality only

TRUE ANSWER : ?
YOUR ANSWER : ?

The surface tension of mercury at normal temperature compared to that of water is

more or less depending on size of glass tube

less

same

more

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 friction

force of cohesion

force of adhesion

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.)

frictionless flow

steady flow

incompressible flow

uniform flow

TRUE ANSWER : ?
YOUR ANSWER : ?

According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to

the weight of the body

less than the weight of the body

more than the weight of the body

weight of the fluid displaced by the body

TRUE ANSWER : ?
YOUR ANSWER : ?

The discharge of a liquid of kinematic viscosity 4 cm²/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is

TURBULENT FLOW

NOT PREDICTABLE FROM THE GIVEN DATA

TRANSITION FLOW

LAMINAR FLOW

TRUE ANSWER : ?
YOUR ANSWER : ?

The horizontal component of force on a curved surface is equal to the

weight of liquid vertically above the curved surface

force on the horizontal projection of the curved surface

product of pressure intensity at its centroid and area

force on a vertical projection of the curved surface

TRUE ANSWER : ?
YOUR ANSWER : ?

Free surface of a liquid tends to contract to the smallest possible area due to force of

viscosity

surface tension

friction

cohesion

TRUE ANSWER : ?
YOUR ANSWER : ?

Two dimensional flow occurs when

the direction and magnitude of the velocity at all points are identical

the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

the magnitude and direction of the velocity do not change from point to point in the fluid

TRUE ANSWER : ?
YOUR ANSWER : ?

The peoperty by virtue of which a liquid opposes relative motion between its different layers is called

co-efficient of viscosity

osmosis

viscosity

surface tension

TRUE ANSWER : ?
YOUR ANSWER : ?

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