ESCO Air Conditioning Practice Exam

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A thermostatic expansion valve is designed to maintain

  1. Constant evaporator pressure

  2. Constant evaporator superheat

  3. Constant refrigerant flow

  4. Variable refrigerant flow

The correct answer is: Constant evaporator pressure

A thermostatic expansion valve is designed to maintain a constant evaporator pressure. This is essential for the proper functioning of the air conditioning system as it ensures that the refrigerant evaporates at a consistent rate, leading to efficient cooling performance. By controlling the flow of refrigerant into the evaporator coil based on the superheat feedback, the expansion valve helps maintain a stable pressure level, allowing the system to operate effectively.

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