The purpose of a contaminated steam system is to __________.
Official USCG Answer & Rule Citation
Correct Answer: Option C — ensure fouled heating coil returns from fuel tanks do not contaminate boiler feed water
Contaminated steam systems isolate drains from fuel oil heaters and cargo coils that may contain oil hydrocarbons. By routing these drains through a separator and contaminated evaporator, potentially fouled returns are prevented from entering the high-purity main boiler feed system, protecting boilers from oil contamination per 46 CFR Subchapter F standards.
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