Question 44Refrigeration & AC - QMED

The correct answer is B. The expansion valve should not be adjusted, as the degree of superheat is within the accepted range. The coil temperature of 10°F and the low side pressure of 15 psig indicate that the system is operating within the normal range of superheat, which is typically between 6-12°F. Adjusting the expansion valve is not necessary in this case, as the system is functioning properly and the degree of superheat is appropriate. The other answer choices are incorrect because: A) a fouled liquid line strainer would not cause the low side pressure and superheat to be within the normal range; C) changing the filter drier would not directly affect the superheat; and D) cleaning the evaporator coils is not necessary if the superheat is within the acceptable range.