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Assertion (A ):Power input per TR of a refrigeration system increases with decrease in evaporator temperature.
Reason (R): COP of refrigeration system decreases with decrease in evaporator temperature.
- 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 ):Power input per TR of a refrigeration system increases ...
The correct answer is option 'A': Both assertion (A) and reason (R) are individually true and R is the correct explanation of A.
Explanation:
- The assertion (A) states that the power input per TR (ton of refrigeration) of a refrigeration system increases with a decrease in evaporator temperature. This means that as the evaporator temperature decreases, more power is required to achieve the desired cooling effect.
- The reason (R) provided is that the coefficient of performance (COP) of a refrigeration system decreases with a decrease in evaporator temperature. The COP is a measure of the efficiency of a refrigeration system and is defined as the ratio of cooling effect (refrigeration capacity) to the power input. As the evaporator temperature decreases, the cooling effect decreases while the power input remains constant or increases. Therefore, the COP decreases.
Explanation of the correct answer:
- The reason (R) provides a valid explanation for the assertion (A). The decrease in COP with a decrease in evaporator temperature directly leads to an increase in power input per TR of the refrigeration system. This is because a lower COP means that more power is required to achieve the same cooling effect.
- Option 'A' is the correct answer because both the assertion and the reason are individually true, and the reason explains why the assertion is true. The decrease in COP with a decrease in evaporator temperature is a well-known phenomenon in refrigeration systems and is a result of thermodynamic principles.
- Option 'B' is incorrect because the reason does explain the assertion correctly.
- Option 'C' is incorrect because the assertion is true, as explained above.
- Option 'D' is incorrect because the reason is true, as explained above.
Explanation:
- The assertion (A) states that the power input per TR (ton of refrigeration) of a refrigeration system increases with a decrease in evaporator temperature. This means that as the evaporator temperature decreases, more power is required to achieve the desired cooling effect.
- The reason (R) provided is that the coefficient of performance (COP) of a refrigeration system decreases with a decrease in evaporator temperature. The COP is a measure of the efficiency of a refrigeration system and is defined as the ratio of cooling effect (refrigeration capacity) to the power input. As the evaporator temperature decreases, the cooling effect decreases while the power input remains constant or increases. Therefore, the COP decreases.
Explanation of the correct answer:
- The reason (R) provides a valid explanation for the assertion (A). The decrease in COP with a decrease in evaporator temperature directly leads to an increase in power input per TR of the refrigeration system. This is because a lower COP means that more power is required to achieve the same cooling effect.
- Option 'A' is the correct answer because both the assertion and the reason are individually true, and the reason explains why the assertion is true. The decrease in COP with a decrease in evaporator temperature is a well-known phenomenon in refrigeration systems and is a result of thermodynamic principles.
- Option 'B' is incorrect because the reason does explain the assertion correctly.
- Option 'C' is incorrect because the assertion is true, as explained above.
- Option 'D' is incorrect because the reason is true, as explained above.
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Community Answer
Assertion (A ):Power input per TR of a refrigeration system increases ...
As we know the ideal cop of a refrigerator is function of evaporator temperature as evaporator temperature decrease the cop will also decrease and we also know that cop tells about the operating cost as cop decrease means more operating cost i.e. more power input to the system.
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Assertion (A ):Power input per TR of a refrigeration system increases with decrease in evaporator temperature. Reason (R): COP of refrigeration system decreases with decrease in evaporator temperature.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 trueCorrect answer is option 'A'. Can you explain this answer?
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Assertion (A ):Power input per TR of a refrigeration system increases with decrease in evaporator temperature. Reason (R): COP of refrigeration system decreases with decrease in evaporator temperature.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 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 ):Power input per TR of a refrigeration system increases with decrease in evaporator temperature. Reason (R): COP of refrigeration system decreases with decrease in evaporator temperature.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 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 ):Power input per TR of a refrigeration system increases with decrease in evaporator temperature. Reason (R): COP of refrigeration system decreases with decrease in evaporator temperature.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 trueCorrect answer is option 'A'. Can you explain this answer?.
Assertion (A ):Power input per TR of a refrigeration system increases with decrease in evaporator temperature. Reason (R): COP of refrigeration system decreases with decrease in evaporator temperature.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 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 ):Power input per TR of a refrigeration system increases with decrease in evaporator temperature. Reason (R): COP of refrigeration system decreases with decrease in evaporator temperature.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 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 ):Power input per TR of a refrigeration system increases with decrease in evaporator temperature. Reason (R): COP of refrigeration system decreases with decrease in evaporator temperature.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 trueCorrect answer is option 'A'. Can you explain this answer?.
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ample number of questions to practice Assertion (A ):Power input per TR of a refrigeration system increases with decrease in evaporator temperature. Reason (R): COP of refrigeration system decreases with decrease in evaporator temperature.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 trueCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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