Moisture contamination within a Freon-based refrigeration system leads to________________?
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Answer: C. freezing automatic regulating valve
Explanation
Moisture contamination within a Freon-based refrigeration system freezes upon passing through the narrow expansion device. This ice crystal formation blocks the automatic regulating valve, completely starving the evaporator of refrigerant flow. Preventing moisture ingress during manufacturing and servicing is critical to avoid unpredictable system blockages. Freon refrigerants have extremely low solubility for water, causing dissolved moisture to separate out at low evaporator temperatures. Expansion valves and capillary tubes feature tiny internal diameters susceptible to blockage by microscopic ice crystals. Filter-driers containing desiccants like silica gel or molecular sieves are installed in liquid lines to absorb residual moisture.
Option A ineffective refrigeration is a general symptom resulting directly from the specific valve blockage caused by frozen moisture. Option B high power consumption occurs indirectly if the compressor runs continuously due to starved evaporator cooling. Option D corrosion of the whole system requires severe acid formation over long periods rather than immediate moisture freezing.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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