When a ring gets stuck on a finger, most people resort to water and soap as a lubricant to get the ring off. In earlier times, animal fat was a common lubricant used in wheel axles. Moving parts in machinery, the piston inside your car’s engine, and bearings are examples of mechanical components that require lubrication. A lubricant is a substance that is introduced between the parts that have relative motion to reduce wear and friction. The lubricants must have characteristics that are suitable for a given situation. For instance, for liquid lubricants, viscosity is one of the important properties. The flash and fire, and the cloud and pour points are examples of other characteristics that are examined when selecting lubricants. Investigate the use of petroleum-based lubricants in reducing wear and friction in today’s mechanical components. Write a brief report discussing the application and characteristics of liquid-petroleum-based and solid lubricants that are commonly used, such as SAE 10W-40 oil and graphite.
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