Fluid Mechanics Questions and Answers – Types of Motion and Vortex Flow

This set of Fluid Mechanics Multiple Choice Questions & Answers (MCQs) focuses on “Types of Motion and Vortex Flow”.

1. When fluid element moves from one position to another, what type of motion is it?
a) Linear Translation
b) Linear Deformation
c) Angular Deformation
d) Rotation
View Answer

Answer: a
Explanation: As per the definition, bodily movement of fluid element is translation.

2. When fluid element moves from one position to another and it undergoes c hange in its dimensions, what type of motion is it?
a) Linear Translation
b) Linear Deformation
c) Angular Deformation
d) Rotation
View Answer

Answer: b
Explanation: As per the definition, bodily movement of fluid element causing it to change its dimension is linear deformation.

3. If there is change in angle contained by two sides. the average of the angle is
a) Linear Translation
b) Linear Deformation
c) Angular Deformation
d) Rotation
View Answer

Answer: c
Explanation: As per the definition, the sum average of two angles is magnitude of angular deformation.
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4. What is the magnitude of vorticity?
a) Twice of angular rotation
b) Thrice of angular rotation
c) Two and half times of angular rotation
d) Same as angular rotation
View Answer

Answer: a
Explanation: It is the mathematical relation between the two.

5. The flow of fluid along curvilinear or curved path is known as
a) Curvilinear Flow
b) Circular Flow
c) Sink Flow
d) Vortex Flow
View Answer

Answer: d
Explanation: The flow of fluid along curvilinear or curved path is known as Vortex flow.
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6. When external torque is absent the type of vortex flow is
a) Circular vortex flow
b) Independent vortex flow
c) Free vortex flow
d) None of the mentioned
View Answer

Answer: c
Explanation: Free vortex flow is due to the absence of any external force.

7. Which of the following is not an example of forced vortex flow?
a) Liquid contained in cylinder rotated about its axis
b) Flow of liquid inside impeller of a centrifugal pump
c) Flow of a water through runner of a turbine
d) Flow of the liquid around a circular bend in a pipe
View Answer

Answer: d
Explanation: Flow of the liquid around a circular bend in a pipe is an example of free vortex flow.
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8. Which of the following is not an example of free vortex flow?
a) Flow of a water through runner of a turbine
b) Flow of liquid through a hole provided at the bottom
c) A whirlpool in a river
d) Flow of the liquid around a circular bend in a pipe
View Answer

Answer: a
Explanation: Flow of a water through runner of a turbine is an example of forced vortex flow.

9. Equation of motion for vortex flow does not take into account centrifugal force?
a) True
b) False
View Answer

Answer: b
Explanation: Equation of motion for vortex flow does take into account centrifugal force.
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10. Equation of motion for vortex flow does take into account shear force
a) True
b) False
View Answer

Answer: b
Explanation: Equation of motion for vortex flow does not take into account shear force.

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To practice all areas of Fluid Mechanics, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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