Question 114Refrigeration & AC - Assistant Engineer

The correct answer is D) The expansion valve should not be adjusted, as the degree of superheat is within the accepted range. The explanation is as follows: 1. Confirm the correct answer: D is the correct answer. 2. Explanation: With a coil temperature of 10°F and a low-side pressure of 15 psig, the degree of superheat at the expansion valve sensing bulb is within the accepted range, typically 6-12°F. This indicates the expansion valve is functioning properly and does not require adjustment. 3. Why other options are incorrect: Changing the filter drier (A), cleaning the evaporator coils (B), or cleaning the liquid line strainer (C) are not necessary based on the given information, as the system appears to be operating within the proper parameters. 4. Concise explanation: The degree of superheat is within the accepted range, so the expansion valve should not be adjusted.