Engine General (Supplementary) USCG Question #403 (Set 6)

Greases used for most marine applications would have what National Lubricating Grease Institute (NLGI) grade?

Official USCG Answer & Rule Citation

Correct Answer: Option B — 2

NLGI Grade 2 is the industry standard for most marine grease applications. It provides the ideal consistency—neither too soft nor too stiff—to ensure proper pumpability in centralized lubrication systems while maintaining sufficient structural stability to stay in place within bearings and prevent leakage under normal operating temperatures.

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