Question Bank • QB_FP_130 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Lubricants and their properties

Question Statement:

In the SAE viscosity designation 'SAE 15W-40' for multi-grade engine crankcase oils, the letter 'W' stands for:

Options:

  • (A) Weight
  • (B) Winter
  • (C) Viscosity Index
  • (D) Wattage

Answer Key:

B

Step-by-Step Solution & Explanation

In multi-grade lubricants (e.g. 15W-40), 'W' stands for Winter, indicating low-temperature cold-start pumping viscosity rating evaluated at $-20^\circ\text{C}$ to $-15^\circ\text{C}$.
← Previous (QB_FP_ADV_028) Next (QB_SUB_FP_LUB_002) →

Practice In Authentic CBT Exam Interface

Test your skills under authentic timed conditions with live scoring and AIR percentile ranking.

Launch CBT Mock Test