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MCQ Questions and Answers on Fluid Mechanics

Q.  
Select wrong statement regarding viscosity


Discuss

Answer :   Option:- D

Explanation :

Discuss here! No Explaination Available for These Question.


Q.  
The phenomenon of rise or fall of liquid surface relative to adjacent general level of liquid is called capillarity. It is associated with


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Answer :   Option:- C

Explanation :

The phenomenon of capillarity is related to angle of contact and surface tension both.


Q.  
The partial pressure exerted by the molecules of a liquid confined in a closed vessel is known as


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Answer :   Option:- C

Explanation :

The partial pressure exerted by the molecules of a liquid confined in a closed vessel is known as vapor pressure.


Q.  
Water hammer in pipes takes place when


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Answer :   Option:- C

Explanation :

Water hammer in pipes takes place when flowing fluid is suddenly brought to rest by closing a valve.


Q.  
Stream lines, path lines and streak lines are virtually identical for


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Answer :   Option:- C

Explanation :

For a steady flow: stream lines, path lines, and streak lines coincide each other.


Q.  
Following phenomenon are associated with surface tension in fluids


Discuss

Answer :   Option:- D

Explanation :

Surface tension in fluids results in excess pressure, angle of contact and capillary action.


Q.  
When can a piezometer be not used for pressure measurement in pipes?


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Answer :   Option:- D

Explanation :

Discuss here! No Explaination Available for These Question.


Q.  
If μ is dynamic viscosity and ρ is the density of fluid, then kinematic viscosity is determined as


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Answer :   Option:- B

Explanation :

If μ is dynamic viscosity and ρ is the density of fluid, then kinematic viscosity is determined as:
==> μ/ρ


Q.  
When a vertical cylindrical vessel containing water is rotated about its axis, then the free surface of water becomes


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Answer :   Option:- D

Explanation :

Discuss here! No Explaination Available for These Question.


Q.  
The terminal velocity of a small sphere falling in a viscous fluid is


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Answer :   Option:- B

Explanation :

Discuss here! No Explaination Available for These Question.