Question

Mathematically, viscosity index can be given by __________

(a) {(L+U)/(L-H)}*100

(b) {(L -U)/(L+H)}*100

(c) {(L+U)/(L+H)}*100

(d) {(L -U)/(L-H)}*100

This question was posed to me by my school teacher while I was bunking the class.

This interesting question is from Viscosity and Viscosity Index in portion Lubricants of Applied Chemistry

Answer 1

The correct answer is (d) {(L -U)/(L-H)}*100

The best I can explain: The viscosity index can be given by {(L -U)/(L-H)}*100. Here, the U=viscosity at 100F oil under the test. V=viscosity at 100F of standard coast oil having V.I zero. H=viscosity at 100F of pennsylvanian crude oil having V.I 100