Which outcome occurs when a refrigeration system's evaporator coil ices over completely?

💡 Explanation

When an evaporator coil ices over, thermal resistance increases dramatically because ice acts as an insulator, limiting heat transfer. Therefore, reduced cooling capacity results, rather than overheating, subcooling changes, or decreased fan motor power, all of which depend on other system parameters.

• Which risk increases in a three-phase power transformer cooled by oil when under-sized circuit breakers fail to trip during an overload?
• Which risk increases when high early strength concrete used in pre-stressed bridge girders experiences unexpected external vibration during the initial curing phase?
• Which risk increases when a molten metal alloy solidifies within a casting mold but external cooling intensifies?
• Which outcome occurs when the thermal limit of a power transformer’s cooling circuit is exceeded?
• Which risk increases when excessive fuel accumulates within the cylinder during cold starts?
• Which outcome is most likely if inductive load switching causes exceeding voltage transients across a circuit breaker’s contacts?