Question 176Refrigeration & AC - Assistant Engineer

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.