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The temperature at which the lubricant forms vapours and produces combustible mixture with air is known as -

  • A.Pour point
  • B.Ignition point
  • C.Flash point
  • D.Normal point

Answer: C

The temperature is the flash point.

The flash point of a lubricant is the lowest temperature at which it gives off enough vapour to form a combustible mixture with air that flashes momentarily when a flame is applied.

The pour point is the lowest temperature at which the oil will flow. The fire point, a little higher than the flash point, is where the vapour keeps burning. 'Ignition point' and 'normal point' are not the term defined here.

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