Question

Viscosity index (VI) is a measure for the
change of viscosity with change in

Options
1)Temperature
²)Pressure

³)Volume
⁴)All of the above​

Answer 1

Viscosity index (VI) is a measure of the change of viscosity with a change in temperature.

Explanation:

1. Viscosity is defined as the measurement of turbulence or resistance of the flow of fluid is called viscosity.
2. For maintaining the viscosity of the fluid depends upon the temperature.
3. Viscosity index is the term that is used for maintaining viscosity.
4. Viscosity index is defined as the fluctuation or change in temperature that changes the viscosity.
5. Viscosity index helps in protecting the change of viscosity.
6. More thicker is the liquid more viscous it would be.

Answer 2

Explanation:

Temperature

Description:  The viscosity index can be defined as a measure, which is both arbitrary and unit-less, of a Fluid’s change in viscosity with respect  to the change in temperature.

The viscosity is affected by the temperature more as the VI index goes lower. And the higher the value of VI index goes the stability of the Fluid is also increased with temperature fluctuations.

Hence option 1 is corrent.