To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of __________.
Official USCG Answer & Rule Citation
Correct Answer: Option D — monel metal or stainless steel
Marine fuel systems handle trace moisture and potentially corrosive elements. Monel metal and stainless steel provide exceptional resistance to galvanic corrosion and oxidation, ensuring structural integrity of strainer elements and scraper blades under continuous marine operating conditions.
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