Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the consequence of high subcooling at the condenser outlet?
High subcooling means there is more liquid refrigerant than needed in the condenser. While some subcooling is good for efficiency, excessive subcooling can lead
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Question: What is the consequence of high subcooling at the condenser outlet?
Answer options:
- Indicates an undercharge of refrigerant
- Suggests an oversized expansion valve ✅ May lead to improved system efficiency, but potentially a partially flooded condenser and reduced compressor capacity
- Is a clear indicator of non-condensable gases in the system
Correct answer: May lead to improved system efficiency, but potentially a partially flooded condenser and reduced compressor capacity
Explanation: High subcooling means there is more liquid refrigerant than needed in the condenser. While some subcooling is good for efficiency, excessive subcooling can lead to a 'flooded condenser' effect, reducing the effective heat exchange surface and increasing head pressure, thereby reducing compressor capacity and overall efficiency.
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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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