Question 75Refrigeration/AC - QMED70% to pass
Which of the following conditions would indicate that the liquid line strainer in a refrigeration system has become excessively restricted and requires cleaning or replacement?
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.
Related Questions
#73 One cause of high head pressure occurring in a refrigeration system can be which of the following? #74 Excessive, prolonged oil foaming in the crankcase of a refrigeration compressor can result in what condition? #76 During tests to discover why a refrigeration compressor is running continuously, it is determined that the refrigerated space temperature is slightly above normal without ever reaching the desired minimum temperature. Suction and discharge pressures are normal for the corresponding box temperature. In this situation, what should you suspect? #77 An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by which of the following? #78 If the compressor is heard to knock while pumping down the low side for repairs, but otherwise the compressor sounds normal; this is a possible indication of what condition?