Refrigeration & Air Conditioning Mechanic Red Seal · Question
A grocery store experiences an issue with its low-temperature freezer rack, which operates on R-507. If the technician determines a significant refrigerant leak is present, which of the following is the most environmentally responsible and legally compliant action?
Under Canadian regulations (e.g., CEPA ODS Regulations), any significant leak must be repaired, and all remaining refrigerant must be recovered prior to repair.
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Question: A grocery store experiences an issue with its low-temperature freezer rack, which operates on R-507. If the technician determines a significant refrigerant leak is present, which of the following is the most environmentally responsible and legally compliant action?
Answer options:
- Top up the system with additional R-507 until pressures are normal. ✅ Recover all remaining refrigerant, repair the leak, evacuate the system, and recharge with virgin R-507.
- Recover some refrigerant, then find and fix the leak, and add new R-507 to top off the system.
- Switch to a different refrigerant like R-290 immediately without recovery.
Correct answer: Recover all remaining refrigerant, repair the leak, evacuate the system, and recharge with virgin R-507.
Explanation: Under Canadian regulations (e.g., CEPA ODS Regulations), any significant leak must be repaired, and all remaining refrigerant must be recovered prior to repair. Topping up is not environmentally responsible, and switching refrigerants without proper recovery and system conversion is incorrect.
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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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