Question 118Refrigeration & AC - 1st Asst/Chief

The correct answer is B) thermostatic expansion valve. The thermostatic expansion valve is the component where flash gas formation is a normal occurrence. As the refrigerant passes through the thermostatic expansion valve, the sudden pressure drop causes a portion of the liquid refrigerant to vaporize, creating flash gas. This flash gas formation is a normal and expected phenomenon in the operation of the thermostatic expansion valve, as it helps regulate the flow of refrigerant into the evaporator coil. The other options, A) evaporator coil, C) receiver tank, and D) condenser coil, are not the correct answers because flash gas formation is not a normal occurrence in these components of the refrigeration system.