Fluid Mechanics Multiple Choice Questions

Fluid Mechanics

Question 1.

Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.

A.

 Thermal conductivity

B.

 Electrical conductivity

C.

 Specific gravity

D.

 Electrical resistivity

Explanation :

Explanation Not Provided

Question 2.

For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance).

A.

 V/Vmax = (x/r)1/7

B.

 V/Vmax = (r/x)1/7

C.

 V/Vmax = (x.r)1/7

D.

 None of these

Explanation :

Explanation Not Provided

Question 3.

Capillary rise of mercury in a small diameter tube is proportional to (where, d = diameter of the tube, σ = surface tension of mercury)

A.

 D

B.

 1/d

C.

 Σ

D.

 L/σ

Explanation :

Explanation Not Provided

Question 4.

What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water iterface? The balloon is of radius 0.1 m and is filled with air.

A.

 4πg/3

B.

 0.01πgH/4

C.

 0.01πgH/8

D.

 0.04πgH/3

Explanation :

Explanation Not Provided

Question 5.

With increase in molecular weight of the gas, the head developed by a centrifugal compressor will

A.

 Decrease

B.

 Increase

C.

 Remain same

D.

 Unpredictable

Explanation :

Explanation Not Provided