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______ is the temperature at which lubricating oil ceases to flow when cooled at standard condition.

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in Automotive Engine Design by (137k points)
______ is the temperature at which lubricating oil ceases to flow when cooled at standard condition.

(a) flashpoint

(b) fire point

(c) moisture test

(d) pour point

The question was asked during an interview.

The question is from Testing of Lubricants topic in chapter Lubrication and Lubricants of Automotive Engine Design

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The correct option is (d) pour point

For explanation: The pour point is the temperature at which a lubricant just ceases to flow when cooled under standard conditions. The lower the pour point the better is the lubricant.

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