FLUID MECHANICS QUIZ

Boundary layer separation occurs when the

Velocity of sound is reached

Valve is closed in a pipeline

Pressure reaches a minimum

Cross-section of the channel is reduced

TRUE ANSWER : ?
YOUR ANSWER : ?

Bernoulli's equation is not applicable, when the flow is

Irrotational

All of these

Incompressible

Viscous

TRUE ANSWER : ?
YOUR ANSWER : ?

Transition from laminar flow to turbulent flow is aided by the

Vibration

Surface roughness and curvature (i.e.sharp corners)

Pressure gradient and the compressibility of the flowing medium

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of

2

>2

43832

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following exemplifies a three dimensional fluid flow ?

Viscous fluid flow between converging plates

Fluid flow at the inlet to a nozzle

Fluid flow between parallel plates

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The value of critical Reynolds number for pipe flow is

100000

10000

1300

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A stream line is

A line connecting the mid points of flow cross-section

Always the path of particle

Drawn normal to the velocity vector at every point

Fixed in space in steady flow

TRUE ANSWER : ?
YOUR ANSWER : ?

The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is

HW/2(H + W)²

HW/4(H + W)²

√(HW/π)

2HW/(H + W)²

TRUE ANSWER : ?
YOUR ANSWER : ?

Velocity at a certain point in case of streamline flow is

Neither A nor B

Constant

Both A & B

Independent of time

TRUE ANSWER : ?
YOUR ANSWER : ?

Cd is always __________ Cc.

Equal to

Less than

Greater than

Either more or less than

TRUE ANSWER : ?
YOUR ANSWER : ?