Question

Pour point is the lowest temperature at which the lubricating oil will flash when a small flame is passed across its surface.

(a) True

(b) False

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This interesting question is from Properties of Lubrication in section Engine Friction and Lubrication of IC Engine

Answer 1

The correct answer is:

(b) False

The pour point is the lowest temperature at which a lubricating oil will flow or pour. It is not related to the flash point, which is the temperature at which oil produces enough vapors to ignite when exposed to a small flame. Therefore, the statement is incorrect.