Air Conditioning Repair Certification (ETI) Practice Exam 2025 - Free Air Conditioning Repair Practice Questions and Study Guide

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Which element is important in reducing superheat in a refrigeration system?

Evaporator pressure

Reducing superheat in a refrigeration system is primarily influenced by evaporator pressure. Superheat refers to the temperature difference between the refrigerant vapor and its saturation temperature at a given pressure. When the evaporator pressure is increased, the saturation temperature of the refrigerant also increases. This allows the system to absorb more heat from the evaporator before the refrigerant reaches the saturation point, effectively lowering the superheat.

As the evaporator pressure rises, it can optimize the heat exchange process, allowing for improved efficiency and performance of the refrigeration cycle. This manipulation of pressure enhances the system's ability to maintain the desired temperature and manage the superheat level effectively.

The other options might have roles in the overall efficiency and function of the refrigeration system, but the primary factor in reducing superheat is the adjustment of evaporator pressure.

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Metering device efficiency

Compressor capacity

Ambient temperature

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