Discussion
A lithium base grease is widely used as a multipurpose grease because it combines
Answer: C
Correct answer: a high drop point with water resistance
Lithium soap gives a drop point around 190 degrees, so it serves at temperatures a calcium grease could not, and it resists water where a sodium grease would wash out. That combination, together with good mechanical stability, is why lithium greases displaced the older types as the general purpose choice.
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