Question 75Refrigeration & AC - QMED
70% to passWhich of the following conditions would indicate that the liquid line strainer in a refrigeration system has become excessively restricted and requires cleaning or replacement?
ANoticeable temperature drop between the strainer inlet and the outlet tubing.
BFrosting at the outlet of the receiver.
CFrosting at the inlet of the compressor.
DExcessively high suction pressure.
AI Explanation
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.
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