Allied & ICAR Exam Bank • ALLIED_1128 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Lubrication Systems

Question Statement:

In tractor engine oil classification, an oil grade designation such as 'SAE 15W-40' signifies:

Options:

  • (A) A multigrade oil with cold flow properties equivalent to SAE 15W at low temperature and viscosity behavior of SAE 40 at 100 degrees Celsius
  • (B) An oil that can only operate between 15 and 40 bar pressure
  • (C) An oil containing 15% water and 40% detergent
  • (D) A mono-grade transmission gear fluid

Answer Key:

A

Step-by-Step Solution & Explanation

The 'W' denotes winter rating; 15W-40 maintains pumpability at low ambient starts while maintaining adequate lubricating film thickness at high operating engine oil temperatures.
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