If the boiler water and condenser hot well levels are normal, but the DC heater level is only 30% of full, you should __________.

Correct Answer: Option C — open the makeup feed

Freshwater evaporators utilize steam or jacket water to distill seawater. A priming or carryover event in the evaporator introduces high-salinity distillate directly into the feed system, resulting in immediate saltwater contamination of the plant condensate.