Refrigeration & Air Conditioning Mechanic Red Seal · Question
A liquid line sight glass with a moisture indicator shows a continuous yellow colour. The system is operating, but capacity is low. What action should be taken?
A yellow moisture indicator signifies excessive moisture in the refrigeration system. Moisture can cause corrosion, acid formation, and potential freezing at ex
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Question: A liquid line sight glass with a moisture indicator shows a continuous yellow colour. The system is operating, but capacity is low. What action should be taken?
Answer options:
- Add more refrigerant to the system ✅ Replace the liquid line filter-drier
- Clean the condenser coil
- Check for non-condensables in the system
Correct answer: Replace the liquid line filter-drier
Explanation: A yellow moisture indicator signifies excessive moisture in the refrigeration system. Moisture can cause corrosion, acid formation, and potential freezing at expansion devices, so replacing the filter-drier is crucial to absorb it.
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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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