🔍 Key Concepts

• Trace the flow path connected to item 7 and note where it takes suction from and where it discharges. • Distinguish between jacket (fresh) water and sea (salt) water systems in a distiller/engine cooling diagram. • Look for any connections from item 7 to the engine jacket cooling circuit and to the distiller heating section (evaporator).

💭 Think About

• Follow the arrows from item 7: does this pump move water through the engine jackets and then to the distiller, or only to the distiller/eductors? • Is the water leaving item 7 used for cooling (closed loop) or as a once-through saltwater supply to the distiller? • Which part of the distiller—evaporator, condenser, or eductors—actually needs jacket water versus seawater?

✅ Before You Answer

• Verify whether the lines from item 7 are tied into the engine jacket water circuit (closed system) or the sea chest/saltwater system (open system). • Check if item 7 connects both to the engine cooling jackets and to the distiller heating coils, indicating dual service. • Confirm whether any separate pump in the diagram already provides distiller seawater feed, which would rule out answers that duplicate that function.