What is the purpose of a steam separator?

The correct answer identifies the primary function of a steam separator as the removal of moisture from steam before it reaches the turbine. In steam systems, especially in power generation, the presence of water droplets in the steam can lead to damage or inefficiency in the turbine. Moisture can cause erosion and reduce the operational efficiency of turbine blades. As steam is produced in a boiler, it may carry water droplets—that's where the steam separator comes in.

The separator works by allowing steam to rise through a chamber where gravity aids in the separation of moisture. The drier steam that emerges is then directed to the turbine, ensuring that only saturated or superheated steam is utilized, thus maximizing the energy output and performance of the turbine. This separation process is crucial for maintaining the integrity of the turbine and improving the overall efficiency of the steam cycle in power generation.

The other options refer to different functions that are not associated with the steam separator's main purpose. For instance, controlling pressure, removing impurities from water, and increasing steam temperature are tasks typically managed by other components within the boiler system or power plant.