Question 75Refrigeration & AC - QMED

The correct answer is A) Noticeable temperature drop between the strainer inlet and the outlet tubing. When the liquid line strainer becomes excessively restricted, it creates a noticeable temperature drop across the strainer. This is because the restricted flow through the strainer increases the pressure drop, which leads to a temperature drop as the refrigerant expands. The other options, while potentially indicative of other issues, do not directly indicate a problem with the liquid line strainer. Frosting at the receiver outlet or compressor inlet could be caused by other system issues, and excessively high suction pressure could have various causes not specifically related to the liquid line strainer.