Power Eng 4th Class 4B Practice Questions - SOPEEC 4th Class Power Engineer Exam Part 4B Exam

What does a high Viscosity Index (VI) indicate about a lubricating oil?

The oil's viscosity changes significantly with temperature changes. The oil has a very high flash point and is highly resistant to ignition. The oil's viscosity changes relatively little with temperature changes. The oil contains a high concentration of sodium soap thickeners.

Correct Answer:

The oil's viscosity changes relatively little with temperature changes.

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