The freshwater cooling systems serving the...

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Question 1 of 2066636eef28f7522a1c51fbfe

The freshwater cooling systems serving the main engines of the platform supply vessel to which you are assigned are arranged as shown in the illustration. What statement best describes the arrangement of the freshwater keel cooler shown in the system diagram? Illustration MO-0138

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Question 1 of 20

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🔍 Key Concepts

• Keel cooler purpose – how it uses seawater to remove heat from the freshwater side • Location relative to seawater – think about where the cooler must sit to be in contact with seawater, yet still protect the freshwater circuit from direct seawater entry • Difference between internal heat exchangers (like lube‑oil coolers) and hull‑mounted coolers

💭 Think About

• Look at how the piping in the diagram connects the keel cooler to the rest of the freshwater system. Does the drawing suggest that seawater flows through the cooler, or that seawater simply surrounds it? • Ask yourself: if this cooler needed seawater contact at all times, would it logically be above or below the vessel’s waterline? • Compare the keel cooler in the sketch with the lube‑oil cooler symbol. Which one is clearly shown as being inside the machinery space, and what does that imply about the other?

✅ Before You Answer

• Confirm that the freshwater circuit is closed and that no seawater piping is shown going through the keel cooler in the diagram. • Decide whether a device that depends on continuous seawater contact can function properly if mounted above the waterline. • Distinguish between equipment that must be inside the hull for maintenance (like the engine and lube‑oil cooler) and equipment that is usually hull‑mounted and externally cooled.

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