Question 50Refrigeration & AC - QMED
70% to passWhich 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
AA
BB
CC
DD
AI Explanation
The correct answer is B. The key requirements for the evaporator coil are a 2 psi pressure drop, the need for externally adjustable superheat, and a replaceable power element. Based on the illustration, option B is the appropriate thermal expansion valve as it features an externally adjustable superheat and a replaceable power element, which meets the specified criteria. The other options would not be suitable - option A lacks the externally adjustable superheat feature, option C does not have a replaceable power element, and option D is not designed for the 2 psi pressure drop requirement.
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