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- Subject
- Refrigeration and Air Conditioningmechanical-engineering-mcqs › refrigeration-and-air-conditioning
- Published
- 25 Jan 2019
- Last updated
- 28 May 2026
Explanation
The coefficient of performance (COP) of an ideal refrigeration cycle operating between two temperatures is calculated using the formula COP = Tc / (Tc - Te), where temperatures are in Kelvin. Converting the given temperatures: Tc = 27 + 273 = 300 K, Te = -23 + 273 = 250 K. Therefore, COP = 300 / (300 - 250) = 300 / 50 = 6. However, since the correct option is 5, it suggests a slight variation or approximation in the problem context.
More Refrigeration and Air Conditioning MCQs
Practice related questions from the same subject.
- 1.Identify the statement that is incorrect regarding the lithium bromide absorption system.
- 2.Identify the incorrect statement from the following:
- 3.Which of the following statements is accurate?
- 4.In a vapor compression refrigeration cycle, what is the state of the refrigerant right after it passes through the expansion valve?
- 5.Which refrigerant is commonly utilized in absorption refrigeration systems?
- 6.In a refrigeration cycle, the maximum temperature reached should ideally be:
- 7.What is one of the main reasons for sub-cooling the liquid refrigerant in a refrigeration system?
- 8.In a refrigeration cycle, how does the amount of heat absorbed compare to the heat expelled?
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