Question

A good lubricant must have __________.

Answer 1

Lubricant:

1. A lubricant is a substance that helps to reduce friction between any two adjacent surfaces in mutual contact,
2. Which ultimately reduces the heat generated when the surfaces move.
3. Generally, they are used wherever a single surface is moving or both are moving.
4. It may also have the function of transmitting forces, transporting foreign particles, or heating or cooling the surfaces.

Qualities of a good lubricant:

1. The main quality of a good lubricant is that it must possess a very high viscosity.
2. This helps the mechanical parts work better when lubricants are applied to a machine.
3. The slope of the lubricant with a high viscosity is more horizontal, and the viscosity remains more stable across a wider temperature range.
4. This means a lubricant with a higher viscosity index is more desirable because it provides a more stable lubricating film over a wider temperature range.
5. The higher the viscosity of the lubricants the greater their ability to provide boundary lubrication, which means lubrication of the boundary between moving parts.

Hence, a good lubricant must have high viscosity.