Mechanical Engineering Exam > Mechanical Engineering Questions > Consider the following statements:1. If a con...
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Consider the following statements:
1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.
2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.
3. Reynolds number of condensing liquid is based on its mass flowrate.
4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:
1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.
2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.
3. Reynolds number of condensing liquid is based on its mass flowrate.
4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:
- a)1 and 2 are correct
- b)2, 3 and 4 are correct
- c)4 alone is correct
- d)1, 2 and 3 are correct
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Consider the following statements:1. If a condensing liquid does not w...
Ans. (d) 1. If a condensing liquid does not wet a surface drop wise, then drop-wise
condensation will take place on it.
4. Suitable coating or vapour additive is used to promote drop-wise
condensation.
condensation will take place on it.
4. Suitable coating or vapour additive is used to promote drop-wise
condensation.
Most Upvoted Answer
Consider the following statements:1. If a condensing liquid does not w...
Statement 1: If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.
This statement is incorrect. Condensation can occur in both drop-wise and film-wise modes. Drop-wise condensation occurs when the condensing liquid forms individual droplets on the surface, while film-wise condensation occurs when a continuous film of liquid is formed on the surface. The wetting behavior of the liquid on the surface does not determine the condensation mode.
Statement 2: Drop-wise condensation gives a higher heat transfer rate than film-wise condensation.
This statement is correct. Drop-wise condensation provides higher heat transfer rates compared to film-wise condensation. This is because in drop-wise condensation, the individual droplets have a higher surface area and can quickly transfer heat to the surrounding environment. On the other hand, in film-wise condensation, the continuous liquid film restricts the heat transfer process, leading to lower heat transfer rates.
Statement 3: Reynolds number of condensing liquid is based on its mass flowrate.
This statement is incorrect. The Reynolds number is a dimensionless parameter used to characterize the flow regime of a fluid. It is defined as the ratio of inertial forces to viscous forces and is typically used to determine the flow regime (laminar or turbulent). The Reynolds number is calculated using the fluid velocity, characteristic length, and fluid properties, such as density and viscosity. The mass flow rate is not directly used in the calculation of the Reynolds number.
Statement 4: Suitable coating or vapor additive is used to promote film-wise condensation.
This statement is correct. In certain applications, a suitable coating or vapor additive can be used to promote film-wise condensation. The purpose of these coatings or additives is to enhance the wetting behavior of the condensing liquid on the surface, allowing for the formation of a continuous liquid film. This film-wise condensation mode can provide improved heat transfer characteristics in specific situations.
In summary, statement 1 is incorrect as condensation can occur in both drop-wise and film-wise modes. Statement 2 is correct as drop-wise condensation provides higher heat transfer rates. Statement 3 is incorrect as the Reynolds number is not based on the mass flow rate. Statement 4 is correct as suitable coatings or vapor additives can be used to promote film-wise condensation. Therefore, the correct answer is option D (1, 2, and 4 are correct).
This statement is incorrect. Condensation can occur in both drop-wise and film-wise modes. Drop-wise condensation occurs when the condensing liquid forms individual droplets on the surface, while film-wise condensation occurs when a continuous film of liquid is formed on the surface. The wetting behavior of the liquid on the surface does not determine the condensation mode.
Statement 2: Drop-wise condensation gives a higher heat transfer rate than film-wise condensation.
This statement is correct. Drop-wise condensation provides higher heat transfer rates compared to film-wise condensation. This is because in drop-wise condensation, the individual droplets have a higher surface area and can quickly transfer heat to the surrounding environment. On the other hand, in film-wise condensation, the continuous liquid film restricts the heat transfer process, leading to lower heat transfer rates.
Statement 3: Reynolds number of condensing liquid is based on its mass flowrate.
This statement is incorrect. The Reynolds number is a dimensionless parameter used to characterize the flow regime of a fluid. It is defined as the ratio of inertial forces to viscous forces and is typically used to determine the flow regime (laminar or turbulent). The Reynolds number is calculated using the fluid velocity, characteristic length, and fluid properties, such as density and viscosity. The mass flow rate is not directly used in the calculation of the Reynolds number.
Statement 4: Suitable coating or vapor additive is used to promote film-wise condensation.
This statement is correct. In certain applications, a suitable coating or vapor additive can be used to promote film-wise condensation. The purpose of these coatings or additives is to enhance the wetting behavior of the condensing liquid on the surface, allowing for the formation of a continuous liquid film. This film-wise condensation mode can provide improved heat transfer characteristics in specific situations.
In summary, statement 1 is incorrect as condensation can occur in both drop-wise and film-wise modes. Statement 2 is correct as drop-wise condensation provides higher heat transfer rates. Statement 3 is incorrect as the Reynolds number is not based on the mass flow rate. Statement 4 is correct as suitable coatings or vapor additives can be used to promote film-wise condensation. Therefore, the correct answer is option D (1, 2, and 4 are correct).
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Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer?
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Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer?.
Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider the following statements:1. If a condensing liquid does not wet a surface drop wise, then condensation will take place on it.2. Drop wise condensation gives a higher heat transfer rate than film wise condensation.3. Reynolds number of condensing liquid is based on its mass flowrate.4. Suitable coating or vapour additive is used to promote film-wise condensation.Of these statements:a)1 and 2 are correctb)2, 3 and 4 are correctc)4 alone is correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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