Fluid Mechanics MCQs

Question 1

Which is not a variable head meter?

Accepted Answer

Rotameter

Answer

Venturimeter

Answer

Pitot tube

Answer

None of these

Question 2

One poise (unit of absolute/dynamic viscosity) is equivalent to one

Accepted Answer

gm/cm.sec

Answer

gm/cm2.sec

Answer

cm2/sec

Answer

m2/sec

Question 3

Poise is converted into stoke by

Accepted Answer

Dividing by density (gm/c.c)

Answer

Multiplying with density (gm/c.c)

Answer

Multiplying with specific gravity

Answer

Dividing by specific gravity

Question 4

Fluidised beds are formed, when the

Accepted Answer

Gravity force is less than the fluid friction

Answer

Fluid friction is zero

Answer

Pressure forces equal gravity forces

Answer

Sum of the fluid friction and pressure forces is equal and opposite to gravity forces

Question 5

Isotropic turbulence occurs

Accepted Answer

Where there is no velocity gradient

Answer

At higher temperatures

Answer

Only in Newtonion fluids

Answer

None of these

Question 6

The momentum correction factor for the velocity distribution of laminar flow is

Accepted Answer

1.66

Answer

1.3

Answer

2.5

Answer

None of these

Question 7

The kinetic energy correction factor for velocity distribution of laminar flow is

Accepted Answer

1.66

Answer

0.5

Answer

1

Answer

2

Question 8

The Navier-Stokes equation deals with the law of conservation of

Accepted Answer

Momentum

Answer

Mass

Answer

Energy

Answer

Both A and B

Question 9

Critical velocity in a pipe flow

Accepted Answer

Increases as pipe diameter increases

Answer

Increases as fluid viscosity increases

Answer

Independent of fluid density

Answer

None of these