ESCO Air Conditioning Practice Exam

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What is the role of the NTC thermistor in a thermal electric expansion valve?

  1. It acts as a pressure regulator

  2. It directly controls the valve's opening and closing

  3. It monitors temperature changes

  4. It stores liquid refrigerant

The correct answer is: It acts as a pressure regulator

The NTC thermistor in a thermal electric expansion valve plays a crucial role as a temperature sensor. It monitors the temperature changes in the system and provides feedback to the controller. This information allows the system to adjust the valve opening accordingly to regulate the refrigerant flow and maintain optimal system performance. While the other options may be components or functions within an air conditioning system, they do not accurately describe the specific role of the NTC thermistor in relation to a thermal electric expansion valve.

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