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The time required for the constituents to separate from the emulsion is known as ______

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The time required for the constituents to separate from the emulsion is known as ______

(a) saponification number

(b) emulsion number

(c) Archimedes principle

(d) acid value test

I got this question in homework.

Question is from Testing of Lubricants in section Lubrication and Lubricants of Automotive Engine Design

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The correct option is (b) emulsion number

The best I can explain: The time in seconds required for the constituents to separate from the emulsion is known as steam emulsion number. A good lubricant should possess a low emulsion number. The quicker the oil separates from the emulsion, the lower is the steam emulsion number and for most purposes the oil is suitable.

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