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Assertion (A): Even though dropwise condensation is more efficient,surface condensers are designed on the assumption of film wisecondensation as a matter of practice.
Reason (R): Dropwise condensation can be maintained with the use ofpromoters like oleic acid.
Reason (R): Dropwise condensation can be maintained with the use ofpromoters like oleic acid.
- a)Both A and R are individually true and R is the correct explanation of A
- b)Both A and R are individually true but R is not the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'B'. Can you explain this answer?
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Assertion (A): Even though dropwise condensation is more efficient,sur...
Ans. (b) A and R are true. R is not correct reason for A.
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Assertion (A): Even though dropwise condensation is more efficient,sur...
Assertion (A): Even though dropwise condensation is more efficient, surface condensers are designed on the assumption of filmwise condensation as a matter of practice.
Reason (R): Dropwise condensation can be maintained with the use of promoters like oleic acid.
The correct answer is option 'B' - Both A and R are individually true but R is not the correct explanation of A.
Explanation:
Surface Condensers:
Surface condensers are widely used in various industries to condense vapors into liquids. They consist of a large number of tubes over which the vapor flows and is condensed into a liquid film. The liquid film then flows down the tubes, and the condensed liquid is collected at the bottom. Surface condensers are commonly used in power plants as well, where they are used to condense steam in order to maximize the efficiency of the power generation process.
Filmwise Condensation:
Filmwise condensation occurs when the condensing vapor forms a thin film along the surface of the condensing tube. This film flows down due to gravity and is eventually collected at the bottom. Filmwise condensation is the most commonly assumed mode of condensation in the design of surface condensers.
Dropwise Condensation:
Dropwise condensation, on the other hand, occurs when the condensing vapor forms discrete droplets on the surface of the condensing tube. These droplets do not flow down like a film but rather fall off the surface due to gravity. Dropwise condensation is known to be more efficient than filmwise condensation as it reduces the resistance to heat transfer and allows for a higher heat transfer coefficient.
Assertion (A):
The assertion states that even though dropwise condensation is more efficient, surface condensers are designed on the assumption of filmwise condensation as a matter of practice. This statement is true. The reason behind this is that while dropwise condensation is more efficient, it is difficult to maintain in practice. The discrete droplets formed during dropwise condensation tend to coalesce and form a continuous film, leading to a transition from dropwise to filmwise condensation. Therefore, it is more practical to design surface condensers based on filmwise condensation.
Reason (R):
The reason states that dropwise condensation can be maintained with the use of promoters like oleic acid. This statement is not the correct explanation of the assertion. While it is true that promoters like oleic acid can enhance dropwise condensation by preventing coalescence and promoting the formation of discrete droplets, they are not commonly used in practice. The use of promoters adds complexity and cost to the design and operation of surface condensers, making them less practical for industrial applications.
In conclusion, while dropwise condensation is more efficient, surface condensers are designed based on the assumption of filmwise condensation due to practical considerations. The use of promoters like oleic acid can enhance dropwise condensation, but it is not commonly employed in practice.
Reason (R): Dropwise condensation can be maintained with the use of promoters like oleic acid.
The correct answer is option 'B' - Both A and R are individually true but R is not the correct explanation of A.
Explanation:
Surface Condensers:
Surface condensers are widely used in various industries to condense vapors into liquids. They consist of a large number of tubes over which the vapor flows and is condensed into a liquid film. The liquid film then flows down the tubes, and the condensed liquid is collected at the bottom. Surface condensers are commonly used in power plants as well, where they are used to condense steam in order to maximize the efficiency of the power generation process.
Filmwise Condensation:
Filmwise condensation occurs when the condensing vapor forms a thin film along the surface of the condensing tube. This film flows down due to gravity and is eventually collected at the bottom. Filmwise condensation is the most commonly assumed mode of condensation in the design of surface condensers.
Dropwise Condensation:
Dropwise condensation, on the other hand, occurs when the condensing vapor forms discrete droplets on the surface of the condensing tube. These droplets do not flow down like a film but rather fall off the surface due to gravity. Dropwise condensation is known to be more efficient than filmwise condensation as it reduces the resistance to heat transfer and allows for a higher heat transfer coefficient.
Assertion (A):
The assertion states that even though dropwise condensation is more efficient, surface condensers are designed on the assumption of filmwise condensation as a matter of practice. This statement is true. The reason behind this is that while dropwise condensation is more efficient, it is difficult to maintain in practice. The discrete droplets formed during dropwise condensation tend to coalesce and form a continuous film, leading to a transition from dropwise to filmwise condensation. Therefore, it is more practical to design surface condensers based on filmwise condensation.
Reason (R):
The reason states that dropwise condensation can be maintained with the use of promoters like oleic acid. This statement is not the correct explanation of the assertion. While it is true that promoters like oleic acid can enhance dropwise condensation by preventing coalescence and promoting the formation of discrete droplets, they are not commonly used in practice. The use of promoters adds complexity and cost to the design and operation of surface condensers, making them less practical for industrial applications.
In conclusion, while dropwise condensation is more efficient, surface condensers are designed based on the assumption of filmwise condensation due to practical considerations. The use of promoters like oleic acid can enhance dropwise condensation, but it is not commonly employed in practice.
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Assertion (A): Even though dropwise condensation is more efficient,surface condensers are designed on the assumption of film wisecondensation as a matter of practice.Reason (R): Dropwise condensation can be maintained with the use ofpromoters like oleic acid.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer?
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Assertion (A): Even though dropwise condensation is more efficient,surface condensers are designed on the assumption of film wisecondensation as a matter of practice.Reason (R): Dropwise condensation can be maintained with the use ofpromoters like oleic acid.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. 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 Assertion (A): Even though dropwise condensation is more efficient,surface condensers are designed on the assumption of film wisecondensation as a matter of practice.Reason (R): Dropwise condensation can be maintained with the use ofpromoters like oleic acid.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. 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 Assertion (A): Even though dropwise condensation is more efficient,surface condensers are designed on the assumption of film wisecondensation as a matter of practice.Reason (R): Dropwise condensation can be maintained with the use ofpromoters like oleic acid.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer?.
Assertion (A): Even though dropwise condensation is more efficient,surface condensers are designed on the assumption of film wisecondensation as a matter of practice.Reason (R): Dropwise condensation can be maintained with the use ofpromoters like oleic acid.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. 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 Assertion (A): Even though dropwise condensation is more efficient,surface condensers are designed on the assumption of film wisecondensation as a matter of practice.Reason (R): Dropwise condensation can be maintained with the use ofpromoters like oleic acid.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. 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 Assertion (A): Even though dropwise condensation is more efficient,surface condensers are designed on the assumption of film wisecondensation as a matter of practice.Reason (R): Dropwise condensation can be maintained with the use ofpromoters like oleic acid.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Assertion (A): Even though dropwise condensation is more efficient,surface condensers are designed on the assumption of film wisecondensation as a matter of practice.Reason (R): Dropwise condensation can be maintained with the use ofpromoters like oleic acid.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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ample number of questions to practice Assertion (A): Even though dropwise condensation is more efficient,surface condensers are designed on the assumption of film wisecondensation as a matter of practice.Reason (R): Dropwise condensation can be maintained with the use ofpromoters like oleic acid.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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