Question 83Refrigeration & AC - Assistant Engineer

The correct answer is A) Liquid line king valve. When charging a refrigeration system through the high side, the liquid line king valve is normally closed. This allows the refrigerant to flow into the high-pressure side of the system, charging it with the necessary refrigerant. The other valves listed are not the correct choice - the dehydrator inlet valve, suction line valve, and thermal expansion valve serve different functions in the refrigeration system and are not involved in the charging process through the high side.