🔍 Key Concepts

• Study the flow path of sea water through the evaporator and condenser sections in both the side and rear views. • Distinguish between evaporator side vs. condenser side components and how they are piped to and from the shell. • Note the difference between tube bundle cooling water flow and plate assembly flow in this type of distilling unit.

💭 Think About

• From the side view, trace where sea water first enters the unit, then follow it through the tubes/plates until it reaches the area that lines up with the flange labeled "Q" in the rear view. • Compare the location of "Q" with the labeled condenser and evaporator sections to decide whether it is associated with the evaporator or condenser. • Ask yourself whether fluid at "Q" has already passed through a heat‑exchange surface (tubes or plates), and whether it should be hotter or cooler than when it entered.

✅ Before You Answer

• Verify which section of the unit (upper or lower) is identified as the condenser and which as the evaporator in the side view labels. • Confirm whether the piping leading to flange Q is connected to the sea water circuit or to another medium such as jacket water or distillate. • Double‑check that "Q" is on the outlet side, not the inlet side, of that cooling/sea water path before deciding which fluid exits there.