Petroleum Refinery Engineering
Viscosity index of a lubricating oil

None of these
Is the measure of variation of viscosity with temperature
Is the measure of its flash point
Should be low

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Petroleum Refinery Engineering
Alkylation

Converts iso-paraffin into olefin
Converts olefin into paraffin
Causes olefins to combine with iso-paraffins
Causes olefins to combine with each other

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