What is the viscosity index for an oil having viscosity = 100s at 38°C? (L=137.9; H=107.1)
a) 132.38
b) 285.38
c) 120.06
d) 122.72
Answer: d
Explanation: V.I. = \(\frac{L-U}{L+U}\)*100
= \(\frac{137.9-100}{137.9-107.1}\)*100
= 122.72.
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