Refrigeration & Air Conditioning Mechanic Red Seal · Question
During a routine inspection, a refrigeration technician notices oil stains around a valve stem on an R-410A system. What is the most appropriate initial action to confirm a leak?
Oil stains are a strong indicator of a refrigerant leak as refrigerant carries oil with it. An electronic leak detector provides a sensitive and efficient way t
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Question: During a routine inspection, a refrigeration technician notices oil stains around a valve stem on an R-410A system. What is the most appropriate initial action to confirm a leak?
Answer options: ✅ Use an electronic refrigerant leak detector around the stained area.
- Apply a soap bubble solution immediately to the stained area.
- Replace the valve stem immediately, assuming it's the source.
- Measure the system's operating pressures to infer a leak.
Correct answer: Use an electronic refrigerant leak detector around the stained area.
Explanation: Oil stains are a strong indicator of a refrigerant leak as refrigerant carries oil with it. An electronic leak detector provides a sensitive and efficient way to confirm the presence and pinpoint the exact location of the leak before attempting repairs, as per best practice and CSA B52 safety guidelines.
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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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