Question 118Refrigeration & AC - Assistant Engineer
70% to passA thermostatic expansion valve is properly controlling evaporator superheat. Adjusting this valve to lower the evaporator superheat setting will result in which of the following?
Athe evaporator pressure will decrease
Bthe expansion valve will further close
Cthe evaporator feed will increase
Dthe expansion valve diaphragm will rupture
AI Explanation
The correct answer is C) the evaporator feed will increase. Lowering the evaporator superheat setting on a thermostatic expansion valve will cause the valve to open further, allowing more refrigerant to flow into the evaporator. This increased refrigerant flow will lead to a higher evaporator feed, which in turn will decrease the superheat in the evaporator. The other options are incorrect: A) The evaporator pressure will actually increase as more refrigerant enters the evaporator. B) The expansion valve will open further, not close. D) Lowering the superheat setting will not cause the expansion valve diaphragm to rupture.
Related Questions
Q32:Persons recovering refrigerant from small appliances must be certified as what t... Q108:Refrigeration systems using forced air circulation evaporators have a tendency t... Q30:Within the territorial limits of the United States, violations of the Clean Air ... Q195:Which of the following statements is true concerning the illustrated gauge manif... Q113:Which of the listed statements describes the method used to determine the amount...
Ready to test your knowledge?
Take a Refrigeration & AC - Assistant Engineer Practice ExamOfficial Resources