Refrigeration & Air Conditioning Mechanic Red Seal · Question
A refrigeration system is operating with an evaporator pressure of 345 kPa (50 psig) and R-410A refrigerant. If the evaporating temperature is -5°C (23°F), what is the superheat at the evaporator outlet if the suction line temperature is 0°C (32°F)?
Superheat is the difference between the actual suction line temperature and the saturated evaporating temperature. In this case, 0°C - (-5°C) = 5°C.
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Question: A refrigeration system is operating with an evaporator pressure of 345 kPa (50 psig) and R-410A refrigerant. If the evaporating temperature is -5°C (23°F), what is the superheat at the evaporator outlet if the suction line temperature is 0°C (32°F)?
Answer options:
- 0°C (0°F) ✅ 5°C (9°F)
- -5°C (-9°F)
- 10°C (18°F)
Correct answer: 5°C (9°F)
Explanation: Superheat is the difference between the actual suction line temperature and the saturated evaporating temperature. In this case, 0°C - (-5°C) = 5°C.
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