Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > Which one of the follflowing is correct?a)the...
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Which one of the follflowing is correct?
- a)the frictional resistance depends on the nature of the surface area of contact
- b)the frictional resistance is independent of the nature of the surface area of contact
- c)the frictional resistance depends on the nature of the surface area of contact for laminar flows but is independent of the nature of the surface area of contact for turbulent flows
- d)the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flows
Correct answer is option 'D'. Can you explain this answer?
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Which one of the follflowing is correct?a)the frictional resistance de...
Explanation: According to the laws of fluid friction, the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flows.
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Which one of the follflowing is correct?a)the frictional resistance de...
The correct answer is option 'D': the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flows.
Frictional resistance is the force that opposes the motion of an object when it is in contact with another surface. It is a result of the interaction between the two surfaces and the properties of the fluid or medium in which the object is moving. The nature of the surface area of contact plays a significant role in determining the frictional resistance.
Laminar Flow:
- Laminar flow refers to a smooth, orderly flow of a fluid with parallel layers moving in the same direction. In this type of flow, the fluid moves in a predictable manner, with minimal mixing and turbulence.
- For laminar flows, the frictional resistance is independent of the nature of the surface area of contact. This means that the frictional resistance does not depend on whether the surface is rough or smooth.
- In laminar flows, the frictional resistance is primarily determined by the viscosity of the fluid and the velocity of the flow. It is not significantly affected by the roughness or smoothness of the surface.
Turbulent Flow:
- Turbulent flow refers to a chaotic, irregular flow of a fluid with mixing and eddies. In this type of flow, the fluid moves in a random manner, with high levels of mixing and turbulence.
- For turbulent flows, the frictional resistance depends on the nature of the surface area of contact. This means that the frictional resistance is influenced by the roughness or smoothness of the surface.
- In turbulent flows, the roughness of the surface causes disruption and mixing of the fluid layers, leading to increased frictional resistance. A rough surface creates more turbulent eddies, resulting in higher frictional resistance compared to a smooth surface.
Conclusion:
In summary, the frictional resistance is independent of the nature of the surface area of contact for laminar flows because it is primarily determined by the viscosity and velocity of the flow. However, for turbulent flows, the frictional resistance depends on the nature of the surface area of contact due to the increased mixing and disruption caused by the rough surface.
Frictional resistance is the force that opposes the motion of an object when it is in contact with another surface. It is a result of the interaction between the two surfaces and the properties of the fluid or medium in which the object is moving. The nature of the surface area of contact plays a significant role in determining the frictional resistance.
Laminar Flow:
- Laminar flow refers to a smooth, orderly flow of a fluid with parallel layers moving in the same direction. In this type of flow, the fluid moves in a predictable manner, with minimal mixing and turbulence.
- For laminar flows, the frictional resistance is independent of the nature of the surface area of contact. This means that the frictional resistance does not depend on whether the surface is rough or smooth.
- In laminar flows, the frictional resistance is primarily determined by the viscosity of the fluid and the velocity of the flow. It is not significantly affected by the roughness or smoothness of the surface.
Turbulent Flow:
- Turbulent flow refers to a chaotic, irregular flow of a fluid with mixing and eddies. In this type of flow, the fluid moves in a random manner, with high levels of mixing and turbulence.
- For turbulent flows, the frictional resistance depends on the nature of the surface area of contact. This means that the frictional resistance is influenced by the roughness or smoothness of the surface.
- In turbulent flows, the roughness of the surface causes disruption and mixing of the fluid layers, leading to increased frictional resistance. A rough surface creates more turbulent eddies, resulting in higher frictional resistance compared to a smooth surface.
Conclusion:
In summary, the frictional resistance is independent of the nature of the surface area of contact for laminar flows because it is primarily determined by the viscosity and velocity of the flow. However, for turbulent flows, the frictional resistance depends on the nature of the surface area of contact due to the increased mixing and disruption caused by the rough surface.
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Which one of the follflowing is correct?a)the frictional resistance depends on the nature of the surface area of contactb)the frictional resistance is independent of the nature of the surface area of contactc)the frictional resistance depends on the nature of the surface area of contact for laminar flows but is independent of the nature of the surface area of contact for turbulent flowsd)the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flowsCorrect answer is option 'D'. Can you explain this answer?
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Which one of the follflowing is correct?a)the frictional resistance depends on the nature of the surface area of contactb)the frictional resistance is independent of the nature of the surface area of contactc)the frictional resistance depends on the nature of the surface area of contact for laminar flows but is independent of the nature of the surface area of contact for turbulent flowsd)the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flowsCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which one of the follflowing is correct?a)the frictional resistance depends on the nature of the surface area of contactb)the frictional resistance is independent of the nature of the surface area of contactc)the frictional resistance depends on the nature of the surface area of contact for laminar flows but is independent of the nature of the surface area of contact for turbulent flowsd)the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flowsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the follflowing is correct?a)the frictional resistance depends on the nature of the surface area of contactb)the frictional resistance is independent of the nature of the surface area of contactc)the frictional resistance depends on the nature of the surface area of contact for laminar flows but is independent of the nature of the surface area of contact for turbulent flowsd)the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flowsCorrect answer is option 'D'. Can you explain this answer?.
Which one of the follflowing is correct?a)the frictional resistance depends on the nature of the surface area of contactb)the frictional resistance is independent of the nature of the surface area of contactc)the frictional resistance depends on the nature of the surface area of contact for laminar flows but is independent of the nature of the surface area of contact for turbulent flowsd)the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flowsCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which one of the follflowing is correct?a)the frictional resistance depends on the nature of the surface area of contactb)the frictional resistance is independent of the nature of the surface area of contactc)the frictional resistance depends on the nature of the surface area of contact for laminar flows but is independent of the nature of the surface area of contact for turbulent flowsd)the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flowsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the follflowing is correct?a)the frictional resistance depends on the nature of the surface area of contactb)the frictional resistance is independent of the nature of the surface area of contactc)the frictional resistance depends on the nature of the surface area of contact for laminar flows but is independent of the nature of the surface area of contact for turbulent flowsd)the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flowsCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Which one of the follflowing is correct?a)the frictional resistance depends on the nature of the surface area of contactb)the frictional resistance is independent of the nature of the surface area of contactc)the frictional resistance depends on the nature of the surface area of contact for laminar flows but is independent of the nature of the surface area of contact for turbulent flowsd)the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flowsCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE).
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