Refrigeration & Air Conditioning Mechanic Red Seal · Question
A technician is checking the subcooling on an R-134a refrigeration system. The liquid line pressure is 1400 kPa gauge, and the liquid line temperature is 30°C. The saturated condensing temperature for R-134a at 1400 kPa gauge is 52°C. What is the subcooling of the refrigerant?
Subcooling is the difference between the saturated condensing temperature and the actual liquid line temperature. In this case, 52°C - 30°C = 22 K. Adequate sub
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Question: A technician is checking the subcooling on an R-134a refrigeration system. The liquid line pressure is 1400 kPa gauge, and the liquid line temperature is 30°C. The saturated condensing temperature for R-134a at 1400 kPa gauge is 52°C. What is the subcooling of the refrigerant?
Answer options:
- 12 K
- 17 K ✅ 22 K
- 27 K
Correct answer: 22 K
Explanation: Subcooling is the difference between the saturated condensing temperature and the actual liquid line temperature. In this case, 52°C - 30°C = 22 K. Adequate subcooling ensures only liquid refrigerant enters the expansion device.
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