Refrigeration & Air Conditioning Mechanic Red Seal · Question
A high superheat at the evaporator outlet with a normal suction pressure often indicates:
High superheat with normal suction pressure often points to an undercharge of refrigerant or a restriction in the liquid line, as both would lead to less refrig
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Question: A high superheat at the evaporator outlet with a normal suction pressure often indicates:
Answer options:
- Overcharge of refrigerant
- Insufficient airflow over the condenser ✅ Undercharge of refrigerant or restricted liquid line
- Faulty compressor
Correct answer: Undercharge of refrigerant or restricted liquid line
Explanation: High superheat with normal suction pressure often points to an undercharge of refrigerant or a restriction in the liquid line, as both would lead to less refrigerant boiling off in the evaporator, resulting in higher vapor temperatures at the outlet.
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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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