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109. Your offshore supply boat is fitted with cooling water systems serving the main propulsion diesel engines as shown in the illustration. What heat exchanger or cooler location would most likely be fitted with sacrificial zinc anodes which must be periodically inspected and replaced when sufficiently deteriorated
Sacrificial zinc anodes protect against corrosion and are located in the raw water/fresh water (RW/FW) heat exchanger water box, as this is the only location where seawater contacts the metal surfaces.
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