viscosity index (vi)
1Viscosity index — is a petroleum industry term. It is a lubricating oil quality indicator, an arbitrary measure for the change of kinematic viscosity with temperature. The viscosity of liquids decreases as temperature increases. The viscosity of a lubricant is… …
2viscosity index — klampos indeksas statusas T sritis Standartizacija ir metrologija apibrėžtis Sutartinės skalės skaičius, apibrėžiantis alyvos klampos kitimą kintant temperatūrai. atitikmenys: angl. viscosity index vok. Viskositätsindex, m rus. индекс вязкости, m …
3viscosity index — klampos indeksas statusas T sritis chemija apibrėžtis Sutartinės skalės vienetas; rodo skysčio (ppr. naftos ar jos perdirbimo produktų) priklausomybę nuo temperatūros. atitikmenys: angl. viscosity index rus. индекс вязкости …
4viscosity index — noun : an arbitrary number assigned as a measure of the constancy of the viscosity of a lubricating oil with change of temperature such that a high index indicates that the viscosity changes little with temperature * * * Auto., Mach. an arbitrary …
5viscosity index — [1] (VI) A measure of how the viscosity of a liquid (especially oil) changes with temperature: the higher the VI, the smaller the change of viscosity with temperature [2] A measure of an oil s ability to resist changes in viscosity when heated …
6viscosity index — noun Date: 1929 an arbitrary number assigned as a measure of the constancy of the viscosity of a lubricating oil with change of temperature with higher numbers indicating viscosities that change little with temperature …
7viscosity index — Auto., Mach. an arbitrary scale for lubricating oils that indicates the extent of variation in viscosity with variation of temperature. [1935 40] * * * …
8viscosity index — viscos′ity in dex n. mac aum an arbitrary scale for lubricating oils that indicates the extent of variation in viscosity with variation of temperature …
9Viscosity index — Коэффициент вязкости …
10viscosity index improver — An oil additive which reduces thinning at high temperature, thus improving the VI …
