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Assertion (A): Addition of insulation to the inside surface of a pipealways reduces heat transfer rate and critical radius concept has nosignificance.
Reason (R): If insulation is added to the inside surface, both surfaceresistance and internal resistance increase.
Reason (R): If insulation is added to the inside surface, both surfaceresistance and internal resistance increase.
- 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 'A'. Can you explain this answer?
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Assertion (A): Addition of insulation to the inside surface of a pipea...
Ans. (a) A and R are correct. R is right reason for A.
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Assertion (A): Addition of insulation to the inside surface of a pipea...
A: Addition of insulation to the inside surface of a pipe always reduces heat transfer rate and critical radius concept has no significance.
R: If insulation is added to the inside surface, both surface resistance and internal resistance increase.
The correct answer is option 'A': Both A and R are individually true and R is the correct explanation of A.
Explanation:
A: Addition of insulation to the inside surface of a pipe always reduces heat transfer rate and critical radius concept has no significance.
When insulation is added to the inside surface of a pipe, it increases the resistance to heat transfer. Insulation acts as a barrier that reduces the heat flow from the fluid inside the pipe to the surroundings. This results in a decrease in the heat transfer rate. Therefore, assertion A is true.
R: If insulation is added to the inside surface, both surface resistance and internal resistance increase.
When insulation is added to the inside surface of a pipe, it increases both the surface resistance and the internal resistance.
1. Surface resistance: The addition of insulation increases the thickness of the pipe wall. This increased thickness creates an additional resistance to heat transfer at the inner surface of the pipe. This resistance is known as the surface resistance. As the surface resistance increases, the heat transfer rate decreases.
2. Internal resistance: The addition of insulation also increases the thickness of the insulation layer on the inside surface of the pipe. This increased thickness creates an additional resistance to heat transfer within the insulation layer itself. This resistance is known as the internal resistance. As the internal resistance increases, the heat transfer rate decreases.
Therefore, both the surface resistance and the internal resistance increase when insulation is added to the inside surface of a pipe. This supports the reason given in statement R.
Conclusion:
Both assertion A and reason R are individually true. The reason R correctly explains why the addition of insulation to the inside surface of a pipe always reduces the heat transfer rate. Hence, the correct answer is option 'A': Both A and R are individually true and R is the correct explanation of A.
R: If insulation is added to the inside surface, both surface resistance and internal resistance increase.
The correct answer is option 'A': Both A and R are individually true and R is the correct explanation of A.
Explanation:
A: Addition of insulation to the inside surface of a pipe always reduces heat transfer rate and critical radius concept has no significance.
When insulation is added to the inside surface of a pipe, it increases the resistance to heat transfer. Insulation acts as a barrier that reduces the heat flow from the fluid inside the pipe to the surroundings. This results in a decrease in the heat transfer rate. Therefore, assertion A is true.
R: If insulation is added to the inside surface, both surface resistance and internal resistance increase.
When insulation is added to the inside surface of a pipe, it increases both the surface resistance and the internal resistance.
1. Surface resistance: The addition of insulation increases the thickness of the pipe wall. This increased thickness creates an additional resistance to heat transfer at the inner surface of the pipe. This resistance is known as the surface resistance. As the surface resistance increases, the heat transfer rate decreases.
2. Internal resistance: The addition of insulation also increases the thickness of the insulation layer on the inside surface of the pipe. This increased thickness creates an additional resistance to heat transfer within the insulation layer itself. This resistance is known as the internal resistance. As the internal resistance increases, the heat transfer rate decreases.
Therefore, both the surface resistance and the internal resistance increase when insulation is added to the inside surface of a pipe. This supports the reason given in statement R.
Conclusion:
Both assertion A and reason R are individually true. The reason R correctly explains why the addition of insulation to the inside surface of a pipe always reduces the heat transfer rate. Hence, the correct answer is option 'A': Both A and R are individually true and R is the correct explanation of A.
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Assertion (A): Addition of insulation to the inside surface of a pipealways reduces heat transfer rate and critical radius concept has nosignificance.Reason (R): If insulation is added to the inside surface, both surfaceresistance and internal resistance increase.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 'A'. Can you explain this answer?
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Assertion (A): Addition of insulation to the inside surface of a pipealways reduces heat transfer rate and critical radius concept has nosignificance.Reason (R): If insulation is added to the inside surface, both surfaceresistance and internal resistance increase.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 'A'. 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): Addition of insulation to the inside surface of a pipealways reduces heat transfer rate and critical radius concept has nosignificance.Reason (R): If insulation is added to the inside surface, both surfaceresistance and internal resistance increase.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 'A'. 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): Addition of insulation to the inside surface of a pipealways reduces heat transfer rate and critical radius concept has nosignificance.Reason (R): If insulation is added to the inside surface, both surfaceresistance and internal resistance increase.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 'A'. Can you explain this answer?.
Assertion (A): Addition of insulation to the inside surface of a pipealways reduces heat transfer rate and critical radius concept has nosignificance.Reason (R): If insulation is added to the inside surface, both surfaceresistance and internal resistance increase.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 'A'. 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): Addition of insulation to the inside surface of a pipealways reduces heat transfer rate and critical radius concept has nosignificance.Reason (R): If insulation is added to the inside surface, both surfaceresistance and internal resistance increase.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 'A'. 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): Addition of insulation to the inside surface of a pipealways reduces heat transfer rate and critical radius concept has nosignificance.Reason (R): If insulation is added to the inside surface, both surfaceresistance and internal resistance increase.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 'A'. Can you explain this answer?.
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ample number of questions to practice Assertion (A): Addition of insulation to the inside surface of a pipealways reduces heat transfer rate and critical radius concept has nosignificance.Reason (R): If insulation is added to the inside surface, both surfaceresistance and internal resistance increase.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 'A'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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