Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the typical operating pressure range (suction/discharge) for an R-410A residential air conditioning system on a standard cooling day (approx. 35°C ambient)?
R-410A operates at significantly higher pressures than older refrigerants like R-22. 100-120 psig suction and 350-425 psig discharge are typical for a hot day.
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Question: What is the typical operating pressure range (suction/discharge) for an R-410A residential air conditioning system on a standard cooling day (approx. 35°C ambient)?
Answer options:
- 50-70 psig / 150-200 psig
- 70-90 psig / 250-300 psig ✅ 100-120 psig / 350-425 psig
- 150-180 psig / 500-600 psig
Correct answer: 100-120 psig / 350-425 psig
Explanation: R-410A operates at significantly higher pressures than older refrigerants like R-22. 100-120 psig suction and 350-425 psig discharge are typical for a hot day.
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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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