Question 61General Subjects - 1st Asst/Chief

The correct answer is B) a cracked distillate pump vent line. A cracked distillate pump vent line can lead to a high absolute pressure within a flash type evaporator. This is because the vent line is designed to release any excess pressure buildup, and a crack or leak in this line would prevent it from functioning properly, causing the pressure inside the evaporator to rise. The other options are incorrect because: A) Seawater feed temperature below 165°F would not directly cause a high pressure in the evaporator. C) Production of high salinity distillate would not lead to high pressure, as the evaporator is designed to handle changes in salinity. D) A leak in the first stage demister would not cause a high pressure, as the demister is meant to separate the vapor from the liquid, not impact the overall pressure.