Which temperature is an SSTG auxiliary condenser considered a hot condenser?

The classification of an SSTG (Steam-Driven Steam Turbine Generator) auxiliary condenser as a "hot condenser" is typically based on the temperature at which the condenser loses its efficiency in cooling the exhaust steam effectively. A condenser is considered hot when the temperature of the cooling water rises to a level that significantly reduces the condenser's performance.

In this context, 140°F is generally recognized as the threshold temperature for auxiliary condensers to be considered "hot." At this temperature, there may be a noticeable decline in the condenser's ability to cool the exhaust steam, which can affect the overall efficiency of the turbine system.

In comparison, temperatures below this threshold, such as 100°F and 120°F, would not indicate a hot condenser status since they are still within effective cooling ranges. Similarly, while 160°F exceeds the threshold, it is not the specific temperature marking the transition to the "hot" classification as used commonly in operational terminology. This establishes why 140°F is considered the correct choice for this question.