Question 169Steam Plants - Assistant Engineer

The correct answer is C) main condenser hotwell. The salinity indicator cell is located in the main condenser hotwell, which is the bottom portion of the main condenser where the condensed steam collects. This location allows the salinity indicator cell to continuously monitor the salinity of the condensate, which is an important parameter for maintaining the purity of the boiler feedwater. The other options are incorrect because they are not the typical location for a salinity indicator cell. The low-pressure turbine casing drain, evaporator brine suction line, and sea water side of the main condenser are not the correct locations for monitoring the salinity of the condensate.