Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the primary method for adding oil to an operating hermetic compressor without shutting down the system?
Adding oil to an operating system requires an oil pump connected to a low-pressure port, typically the suction service valve. The compressor's suction will draw
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Question: What is the primary method for adding oil to an operating hermetic compressor without shutting down the system?
Answer options:
- Pouring oil directly into the suction line
- Injecting oil using a vacuum pump ✅ Using an oil pump connected to a low-pressure port, ensuring oil is drawn in by suction
- Adding oil through the discharge service valve
Correct answer: Using an oil pump connected to a low-pressure port, ensuring oil is drawn in by suction
Explanation: Adding oil to an operating system requires an oil pump connected to a low-pressure port, typically the suction service valve. The compressor's suction will draw the oil in while the system is running, preventing air ingress.
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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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