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Lubricants
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- Words:
- 1376
- Submitted:
- Wed Nov 04 2009
- Mark submitted by Author:
... Task 1 (P1) a) explain the purpose of three different types of lubricant Oils Oil is a substance that is in a viscous liquid state, and is used between two moving surfaces to reduce the friction between them, improving efficiency and reducing wear. They may also have the function of dissolving or transporting foreign particles and of distributing heat. The single largest applications for lubricants, in the form of motor oil, is to protect the internal combustion engines in motor vehicles and powered equipment. Greases Greases are Semi-solid lubricants possessing a higher initial viscosity than oil. Grease consists of oil and/or other fluid lubricant that is mixed with another thickener substance, a soap, to form a solid. The 'soap' is used in the chemical sense, meaning a metallic salt of a fatty acid, which forms an emulsion with the oil. Greases are used where a mechanism can only be lubricated infrequently and where a lubricating oil would
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