Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the most common cause of high discharge pressure in a refrigeration system?
Insufficient heat rejection from the condenser due to restricted airflow (e.g., dirty coil, fan failure) causes discharge pressure to rise.
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Question: What is the most common cause of high discharge pressure in a refrigeration system?
Answer options: ✅ Restricted airflow over the condenser
- Undercharge of refrigerant
- Expansion valve stuck open
- Dirty evaporator coil
Correct answer: Restricted airflow over the condenser
Explanation: Insufficient heat rejection from the condenser due to restricted airflow (e.g., dirty coil, fan failure) causes discharge pressure to rise.
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- 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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