Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the purpose of conducting a vacuum test on a refrigeration system after repairs?
Pulling a deep vacuum removes air (non-condensables) and moisture from the system, which can cause chemical reactions and poor performance.
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Question: What is the purpose of conducting a vacuum test on a refrigeration system after repairs?
Answer options: ✅ To remove non-condensable gases and moisture
- To check for refrigerant leaks
- To verify compressor operation
- To charge the system with refrigerant
Correct answer: To remove non-condensable gases and moisture
Explanation: Pulling a deep vacuum removes air (non-condensables) and moisture from the system, which can cause chemical reactions and poor performance.
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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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