Critical Velocity NEET Questions

Physics - Properties of Solids and Liquids

Critical Velocity MCQ Questions


1.
Critical velocity is defined as:
A.
The maximum velocity of a fluid flow up to which the flow remains laminar
B.
The velocity at which flow becomes turbulent
C.
The velocity at which objects achieve terminal velocity
D.
The speed of sound in a fluid
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ANSWER :
A. The maximum velocity of a fluid flow up to which the flow remains laminar
2.
Which of the following parameters affects the critical velocity of a fluid?
A.
Viscosity, density, and diameter of the pipe
B.
Temperature only
C.
Color of the fluid
D.
Surface tension only
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ANSWER :
A. Viscosity, density, and diameter of the pipe
3.
Which of the following influences the critical velocity of a fluid in a pipe?
A.
Viscosity of the fluid
B.
Diameter of the pipe
C.
Density of the fluid
D.
All of the above
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ANSWER :
D. All of the above
4.
When fluid velocity exceeds critical velocity, the flow becomes:
A.
Uniform
B.
Laminar
C.
Turbulent
D.
Zero
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ANSWER :
C. Turbulent
5.
The Reynolds number (Re) for critical velocity in a pipe is approximately:
A.
5000
B.
100
C.
2000
D.
10,000
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ANSWER :
C. 2000
6.
Which type of flow is associated with a Reynolds number less than 2000?
A.
Oscillatory flow
B.
Turbulent flow
C.
Laminar flow
D.
Stagnant flow
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ANSWER :
C. Laminar flow