What is the maximum acceptable level of dissolved solids in steam supplied to a steam turbine?

The maximum acceptable level of dissolved solids in steam supplied to a steam turbine is important because excessive dissolved solids can lead to foaming and scaling within the turbine components. This can adversely affect the efficiency, performance, and lifespan of the turbine.

The chosen answer of 0.1 ppm is correct as it reflects industry standards aimed at minimizing these issues. Keeping the concentration of dissolved solids low, as indicated by this value, ensures that the steam is of high quality and does not compromise the operational integrity of the turbine.

In contrast, higher levels of dissolved solids (like those suggested in the other options) could result in significant operational problems. For instance, levels of 1 ppm or above may lead to increased corrosion and deposits that can hinder the performance of the turbine. Therefore, maintaining dissolved solids at or below 0.1 ppm is critical for the safe and efficient operation of steam turbines.