Question Bank • QB_FP_150 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Lubricants and their properties

Question Statement:

In engine lubricating oils, a high Viscosity Index (VI) indicates that:

Options:

  • (A) The viscosity of the oil changes relatively little with changes in temperature
  • (B) The viscosity of the oil increases rapidly as temperature rises
  • (C) The oil has very high volatility and low flash point
  • (D) The oil contains no anti-wear or detergent additives

Answer Key:

A

Step-by-Step Solution & Explanation

Viscosity Index (VI) measures the rate of change of viscosity with temperature. A higher VI indicates smaller viscosity changes over wide operating temperature ranges, which is essential for multi-grade engine oils.
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