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← ScienceWhich risk increases when the evaporator of a refrigeration system undergoes a two-phase transition near its critical point?
A)Oil viscosity within the compressor
B)Erosion of impeller pump surfaces
C)Poor refrigerant distribution in tubes✓
D)Expansion valve mechanical seizure
💡 Explanation
Poor distribution happens because near the critical point, the distinction between liquid and vapor phases blurs, therefore uniform flow is less stable; rather than impacting lubrication or valve mechanics, the phase transition affects vapor and liquid behavior.
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