Refrigeration & Air Conditioning Mechanic Red Seal · Question
A Canadian technician is evacuating an R-22 refrigeration system prior to repair. What level of ultimate evacuation must be achieved according to CSA B52 standards for systems operating below atmospheric pressure?
CSA B52 specifies an ultimate evacuation level of 500 microns (67 Pa) for systems operating at or below atmospheric pressure. This ensures that non-condensable
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Question: A Canadian technician is evacuating an R-22 refrigeration system prior to repair. What level of ultimate evacuation must be achieved according to CSA B52 standards for systems operating below atmospheric pressure?
Answer options: ✅ 500 microns (67 Pa)
- 250 microns (33 Pa)
- 200 microns (27 Pa)
- 100 microns (13 Pa)
Correct answer: 500 microns (67 Pa)
Explanation: CSA B52 specifies an ultimate evacuation level of 500 microns (67 Pa) for systems operating at or below atmospheric pressure. This ensures that non-condensable gases and moisture are adequately removed from the system.
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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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