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The ____________ are obtained from the residual mass left during crude petroleum distillation.

(a) fatty oils

(b) synthetic lubricants

(c) mineral lubricating oils

(d) none of the mentioned

I got this question in an interview for internship.

This is a very interesting question from Types of Lubricants topic in chapter Engine Friction and Lubrication of IC Engine

1 Answer

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The correct answer is:

(c) mineral lubricating oils

Mineral lubricating oils are obtained from the residual mass left after crude petroleum distillation. These oils are refined through processes like distillation, de-waxing, and de-sulfurization to make them suitable for use as lubricants.

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