Question 42General Subjects - 1st Asst/Chief

The correct answer is D) salt water feed heater. In a flash-type evaporator, the highest temperature and pressure conditions occur in the salt water feed heater, which is responsible for preheating the incoming seawater before it enters the first stage of the evaporator. This is because the feed heater is the point where the seawater is exposed to the highest temperature and pressure in the system, as it absorbs heat from the steam or hot water used to raise its temperature. The other options are incorrect because they do not represent the highest temperature and pressure conditions in the evaporator system. The first and second stages of the evaporator will have lower temperatures and pressures compared to the feed heater, and the brine pump discharge is not directly exposed to the highest thermal and pressure conditions.