Engineering · Diesel — Cooling
A central cooling system on a modern motorship typically uses seawater to cool:
- AThe cylinders directly
- BA low-temperature freshwater circuit through a central seawater cooler✓ Correct
- CThe lube oil sump directly with seawater
- DOnly the turbocharger
Explanation
Central cooling keeps corrosive seawater confined to one set of coolers; treated freshwater (low- and high-temperature circuits) cools the engine and is itself cooled by seawater at a central cooler.
Authority: Diesel Engines (USCG engineering topic)
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