Refrigeration & Air Conditioning Mechanic Red Seal · Question
When troubleshooting a refrigeration system, a technician measures the saturated suction temperature (SST) and finds it to be significantly lower than the air temperature entering the evaporator coil. What does this indicate about the heat transfer process?
A large temperature difference between the air and the SST suggests that the refrigerant is not absorbing heat effectively due to potential issues like low airf
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Question: When troubleshooting a refrigeration system, a technician measures the saturated suction temperature (SST) and finds it to be significantly lower than the air temperature entering the evaporator coil. What does this indicate about the heat transfer process?
Answer options:
- Efficient heat transfer is occurring within the evaporator.
- The evaporator is likely absorbing excessive heat. ✅ The heat transfer rate to the refrigerant is inadequate.
- The system is probably overcharged with refrigerant.
Correct answer: The heat transfer rate to the refrigerant is inadequate.
Explanation: A large temperature difference between the air and the SST suggests that the refrigerant is not absorbing heat effectively due to potential issues like low airflow, dirty coil, or insufficient refrigerant flow.
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Question explanations
- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
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