GCAP Operator 2 Practice Exam 2025 – Complete Prep Guide

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When adjusting a flooded evaporator, which parameter should primarily be manipulated to achieve optimal performance?

Expansion valve setting

Liquid feed control

To achieve optimal performance in a flooded evaporator system, focusing on liquid feed control is crucial. This parameter directly influences the amount of refrigerant that enters the evaporator, ensuring that it maintains the proper level of refrigerant for efficient heat exchange and effective cooling.

When the liquid feed rate is well-adjusted, it maximizes the surface area available for heat transfer, allowing the refrigerant to absorb the maximum amount of heat from the surrounding medium. This helps maintain a stable evaporator temperature and prevents issues such as flooding or starving of the evaporator, which can lead to inefficiencies or system damage.

While other parameters like expansion valve setting or compressor speed can also affect performance, the liquid feed control is the most significant for optimizing the flooded evaporator operation, as it directly relates to refrigerant management within the system.

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Compressor speed

Ambient atmosphere control

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