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Assertion (A): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases.
Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.
- 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 'D'. Can you explain this answer?
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Assertion (A): If a domestic refrigerator works inside an adiabatic ro...
Answer:
Adiabatic Room and Domestic Refrigerator:
- An adiabatic room is a room that is thermally insulated, meaning it does not exchange heat with the outside environment.
- A domestic refrigerator is a refrigeration system used for storing food and beverages.
- If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases.
Vapour Compression Refrigeration Cycles and COP:
- Vapour compression refrigeration cycles are the most common refrigeration cycles used in domestic refrigerators.
- COP (Coefficient of Performance) is a measure of a refrigeration system's efficiency.
- Compared to air refrigeration cycles, vapour compression refrigeration cycles have high COP.
Assertion and Reason:
- Assertion (A): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases.
- Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.
Explanation:
- The assertion is true because when a domestic refrigerator works inside an adiabatic room with its door open, the refrigeration system transfers heat from the room to the refrigerant fluid, thereby decreasing the room temperature.
- The reason is also true because vapour compression refrigeration cycles have high COP due to their ability to compress the refrigerant fluid to increase its temperature and then expand it to decrease its temperature, making the system more efficient than air refrigeration cycles.
- However, the reason is not the correct explanation of the assertion because the reason does not explain why the room temperature decreases when a domestic refrigerator works inside an adiabatic room with its door open. Instead, it explains why vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.
Conclusion:
- Option 'D' is the correct answer because the assertion is false due to the incorrect explanation provided by the reason.
Adiabatic Room and Domestic Refrigerator:
- An adiabatic room is a room that is thermally insulated, meaning it does not exchange heat with the outside environment.
- A domestic refrigerator is a refrigeration system used for storing food and beverages.
- If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases.
Vapour Compression Refrigeration Cycles and COP:
- Vapour compression refrigeration cycles are the most common refrigeration cycles used in domestic refrigerators.
- COP (Coefficient of Performance) is a measure of a refrigeration system's efficiency.
- Compared to air refrigeration cycles, vapour compression refrigeration cycles have high COP.
Assertion and Reason:
- Assertion (A): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases.
- Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.
Explanation:
- The assertion is true because when a domestic refrigerator works inside an adiabatic room with its door open, the refrigeration system transfers heat from the room to the refrigerant fluid, thereby decreasing the room temperature.
- The reason is also true because vapour compression refrigeration cycles have high COP due to their ability to compress the refrigerant fluid to increase its temperature and then expand it to decrease its temperature, making the system more efficient than air refrigeration cycles.
- However, the reason is not the correct explanation of the assertion because the reason does not explain why the room temperature decreases when a domestic refrigerator works inside an adiabatic room with its door open. Instead, it explains why vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.
Conclusion:
- Option 'D' is the correct answer because the assertion is false due to the incorrect explanation provided by the reason.
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Community Answer
Assertion (A): If a domestic refrigerator works inside an adiabatic ro...
We know that the heat pump has 150 percent efficiency. so ass we open the door of refrigerator so definatly cooling will occure but as the condensor coils are also there in the room,so this heat will be decipated in room... and irrespective of that we are supplying work to compressor, so equivalent amount of heat also added to condensor heat. so the room temp will rise slowly
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Assertion (A): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases. Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.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 'D'. Can you explain this answer?
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Assertion (A): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases. Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.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 '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 Assertion (A): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases. Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.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 '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 Assertion (A): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases. Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.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 'D'. Can you explain this answer?.
Assertion (A): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases. Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.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 '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 Assertion (A): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases. Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.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 '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 Assertion (A): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases. Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.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 'D'. Can you explain this answer?.
Solutions for Assertion (A): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases. Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.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 'D'. 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): If a domestic refrigerator works inside an adiabatic room with its door open, the room temperature gradually decreases. Reason (R): Vapour compression refrigeration cycles have high COP compared to air refrigeration cycles.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 'D'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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