Refrigeration & Air Conditioning Mechanic Red Seal · Question
A refrigeration system with a sight glass showing continuous bubbles indicates what common issue?
Bubbles in the sight glass typically indicate that there isn't enough liquid refrigerant to completely fill the sight glass, suggesting an undercharge or a liqu
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Question: A refrigeration system with a sight glass showing continuous bubbles indicates what common issue?
Answer options: ✅ Refrigerant undercharge or restriction in the liquid line.
- Refrigerant overcharge, leading to liquid slugging.
- Presence of non-condensable gases in the system.
- Excessive superheat at the evaporator outlet.
Correct answer: Refrigerant undercharge or restriction in the liquid line.
Explanation: Bubbles in the sight glass typically indicate that there isn't enough liquid refrigerant to completely fill the sight glass, suggesting an undercharge or a liquid line restriction creating flash gas.
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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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