Allied & ICAR Exam Bank • ALLIED_0270 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Lubricants and their properties

Question Statement:

In multigrade engine lubricating oils (e.g., SAE 15W-40), the letter 'W' designates:

Options:

  • (A) Winter rating (viscosity tested at low cold-cranking temperatures)
  • (B) Weight of the oil drum
  • (C) Watt power rating
  • (D) Water resistance index

Answer Key:

A

Step-by-Step Solution & Explanation

The 'W' stands for Winter grade, indicating viscosity performance at $-15^\circ\text{C}$ to $-25^\circ\text{C}$.
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