Question

The temperature at which lubricant become cloudy is called----*​

Answer 1

Answer:

3 Cloud and pour-points: When an oil is cooled slowly, the temperature at which it becomes cloudy or hazy in appearance, is called its cloud-point while the temperature at which the oil ceases to flow or pour, is called its pour-point.

Explanation:

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Answer 2

Cloud and pour-points: When an oil is cooled slowly, the temperature at which it becomes cloudy or hazy in appearance, is called its cloud-point while the temperature at which the oil ceases to flow or pour, is called its pour-point. Cloud and pour-points indicate the suitability of lubricants in cold conditions. Lubricant used in a machine working at low temperatures should possess low pour-point; otherwise solidification of lubricant will cause jamming of the machine. It has been found that presence of waxes in the lubricating oil raise the pout-point. Determination of pour-point is carried out with help of pour-point apparatus.