Final answer:
The correct answer is d) All of the above. A person may refill a refrigeration system with refrigerant if the system is leak-free, the refrigerant is recycled, and the person is certified.
Step-by-step explanation:
The correct answer is d) All of the above. A person may refill a refrigeration system with refrigerant if the system is leak-free, the refrigerant is recycled, and the person is certified. All three conditions must be met for the person to safely refill the refrigeration system.
The process of heat transfer within a refrigerator or freezer happens as follows: The evaporator converts the liquid refrigerant into gas by absorbing heat from the interior. This causes the interior to cool down. Then, the gas is compressed by the compressor, increasing its temperature. The heated gas then moves to the condenser, where it releases the absorbed heat to the surroundings and converts back into a liquid.