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Which of the following oils are obtained by mixing mineral oils with animal or vegetable oils?

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Which of the following oils are obtained by mixing mineral oils with animal or vegetable oils?

(a) Animal oils

(b) Mineral oils

(c) Greases

(d) Blended oils

I got this question in an internship interview.

Enquiry is from Miscellaneous Materials in portion Miscellaneous Materials, Plain and Reinforced Cement Concrete of Construction & Building Materials

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Right answer is (d) Blended oils

To explain: Blended oils are obtained by mixing mineral oils with animal or vegetable oils. Blended oils are economical. Also, the mineral oils become less volatile when animal oils or vegetable oils are added to them.

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