Question 176Refrigeration/AC - Assistant Engineer70% to pass
Which of the following illustrated thermal expansion valves would be appropriate to use on an evaporator coil with a 2 psi pressure drop, where externally adjustable superheat and a replaceable power element are both desired? Illustration GS-RA-06
AI Explanation
The correct answer is B.
The key factors that make option B the appropriate choice are the desired 2 psi pressure drop across the evaporator coil, the need for externally adjustable superheat, and the requirement for a replaceable power element. Option B illustrates a thermal expansion valve with these exact features, making it the most suitable selection for the given specifications.
The other options may not provide the necessary adjustability or replacement capability, or may not be designed to handle the specific 2 psi pressure drop required for the evaporator coil.
Related Questions
#174 In a refrigeration system, the pressure within the power element of a thermostatic expansion valve depends directly upon what factor? #175 What is one function of the thermal expansion valve used in a refrigeration system? #177 In a vapor compression type refrigeration cycle, the refrigerant temperature decreases the most when passing through which system component? #178 When the sensing bulb of a thermostatic expansion valve is charged with a fluid different from the charge used in the system, what name of the charge is associated with the power element? #179 Through which of the components shown in the illustration is flash gas formation a normal occurrence? Illustration GS-RA-25