The discharge gas from the compressor is what in a wet compression refrigeration system?

In a wet compression refrigeration system, the discharge gas from the compressor is classified as saturated. This occurs because, during the compression process, the refrigerant is often partially vapor and partially liquid when it enters the compressor. As it is compressed further, some of the liquid refrigerant may not evaporate completely, which results in a mixture of vapor and liquid at the compressor's discharge.

In contrast, the other options refer to states of the refrigerant that are not typical at the compressor discharge in this type of system. For example, superheated gas would indicate that the refrigerant has absorbed additional heat beyond the boiling point after complete evaporation, while subcooled liquid would mean that the refrigerant has been cooled below its condensing temperature after it has fully liquefied. Since a wet compression system utilizes this saturated vapor-liquid mixture, the correct characterization of the discharge gas is saturated.