Question Bank • QB_SUB_FP_LUB_001 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Lubricants and their properties

Question Statement:

The 'Viscosity Index' (VI) of an engine lubricating oil indicates:

Options:

  • (A) The rate of change of viscosity with respect to temperature
  • (B) The absolute flash point of the lubricant
  • (C) The percentage of sulfur and ash additives
  • (D) The pour point below zero Celsius

Answer Key:

A

Step-by-Step Solution & Explanation

Viscosity Index measures the sensitivity of lubricant viscosity to temperature fluctuations. A higher VI signifies smaller change in viscosity across operating temperature spans.
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