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← TechnologyWhich outcome occurs when heat input surpasses a refrigerator's thermal capacity?
A)Compressor oil viscosity decreases rapidly✓
B)Refrigerant subcooling significantly increases
C)Evaporator temperature remains stable
D)Condenser pressure decreases rapidly
💡 Explanation
Increased heat causes overheating, pushing the compressor beyond design. The **lubrication breakdown** affects sealing and thus volumetric efficiency because oil thins as temperature climbs; therefore, the viscosity drops rather than refrigerant gains subcooling under increased boiling point operational risk.
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