Refrigeration & Air Conditioning Mechanic Red Seal · Question
A technician is using an ultraviolet (UV) dye leak detection method on an R-134a commercial freezer. After adding the dye and allowing the system to operate for a period, where should the technician focus their inspection to find the leak?
UV dye, when mixed with refrigerant and circulated, will leak out with the refrigerant and oil, leaving a fluorescent trace that's visible under a UV lamp. Thor
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Question: A technician is using an ultraviolet (UV) dye leak detection method on an R-134a commercial freezer. After adding the dye and allowing the system to operate for a period, where should the technician focus their inspection to find the leak?
Answer options: ✅ All connections, welds, and areas where refrigerant components are joined, using a UV lamp.
- Only at the compressor seals and discharge line.
- On the high-pressure side of the system, feeling for cold spots.
- By smelling for unusual odours around the evaporator unit.
Correct answer: All connections, welds, and areas where refrigerant components are joined, using a UV lamp.
Explanation: UV dye, when mixed with refrigerant and circulated, will leak out with the refrigerant and oil, leaving a fluorescent trace that's visible under a UV lamp. Thorough inspection of all potential leak points, especially connections and where oil stains might form, is crucial for effective leak identification.
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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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