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← TechnologyWhich restriction decreases evaporator efficiency in a refrigerated shipping container?
A)Frost accumulation on the coils✓
B)Reduced compressor oil viscosity
C)Increased ambient air temperature
D)Degradation of container insulation
💡 Explanation
Frost acts as insulation due to the mechanism of thermal resistance; because frost buildup hinders heat absorption in the evaporator coils, this latent heat transfer decreases refrigeration capacity below the needed setpoint, therefore affecting efficiency, rather than mechanical or environmental factors alone.
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