The adverse effects of burning high sulfur fuel can be compensated for by using a cylinder oil having sufficient __________.
Official USCG Answer & Rule Citation
Correct Answer: Option C — alkalinity
High sulfur residual fuels form sulfurous and sulfuric acids during combustion. Cylinder oils require a high Total Base Number (TBN), denoting substantial alkalinity, to neutralize these corrosive acids and prevent destructive liner and ring wear.
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