Refrigeration & Air Conditioning Mechanic Red Seal · Question
A refrigeration system with a nameplate charge of 15 kg of R-410A is being recovered. The recovery unit is rated for a maximum recovery rate of 0.5 kg/min. If the technician starts recovery at 10:00 AM and achieves 90% recovery before the system pressure equalizes, approximately what time would the initial recovery stage be completed?
The amount of refrigerant to recover is 15 kg * 0.90 = 13.5 kg. At a rate of 0.5 kg/min, the time required is 13.5 kg / 0.5 kg/min = 27 minutes. Therefore, the
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Question: A refrigeration system with a nameplate charge of 15 kg of R-410A is being recovered. The recovery unit is rated for a maximum recovery rate of 0.5 kg/min. If the technician starts recovery at 10:00 AM and achieves 90% recovery before the system pressure equalizes, approximately what time would the initial recovery stage be completed?
Answer options: ✅ 10:27 AM
- 10:30 AM
- 10:20 AM
- 10:45 AM
Correct answer: 10:27 AM
Explanation: The amount of refrigerant to recover is 15 kg * 0.90 = 13.5 kg. At a rate of 0.5 kg/min, the time required is 13.5 kg / 0.5 kg/min = 27 minutes. Therefore, the recovery would be completed around 10:27 AM, assuming a consistent recovery rate.
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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?
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