Question 144Refrigeration & AC - QMED

The correct answer is D) prevent icing of the expansion valve. Dehydrators, also known as filter-driers, are typically located in the liquid line of refrigeration systems to remove moisture and prevent the formation of ice crystals in the expansion valve. The expansion valve is a critical component that controls the flow of refrigerant into the evaporator, and any ice buildup in this area can disrupt the proper operation of the system. By removing moisture from the refrigerant, the dehydrator helps to prevent the expansion valve from freezing, ensuring efficient and reliable operation of the refrigeration system. The other answer choices are incorrect because: A) Preventing liquid slugging is not the primary purpose of the dehydrator's location. B) Reducing compressor discharge line sweating is not directly related to the dehydrator's position in the liquid line. C) Removing oil from the refrigerant is not the main function of a dehydrator in this context.