Lubricants MCQs

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1. sQ1. The process of introducing lubricant between the two moving parts in a machine is called





2. . Lubricants are primarily used to reduce





3. . In addition to other industrial applications, lubricants are used for





4. . Oil, water, and oil emulsion are used as





5. . Cutting fluids should have viscosity





6. . Mineral oils that are used as lubricants are obtained from





7. . A maximum hardness on the Moh’s scale appears to be the practical limit for solid lubricant





8. . Easily oxidized at high temperature into acid and become gummy at low temperature is





9. . The blended oils are mixtures of vegetable oils and





10. . Petroleum oils have long-chain hydrocarbons, ranging between





11. . The lubricants which are produced by oils or fats with soap and water at 204-316°C





12. . Oiliness of which oils can be improved by adding oils, such as Oleic and Stearic acid





13. . Synthetic Lubricants Polyglycols are produced by oxidation of ethylene and





14. . The solid lubricant should have melting point





15. . Which lubricant is usually used when it is not practical to use oil





16. . Molybdenum disulfide is a common lubricant





17. . Light machines like sewing, watches, scientific equipment require lubricating oil of viscosity





18. . Road rollers, tractors, railway tracks require lubricant





19. . Steam engine cylinders require lubricant of viscosity





20. . Spaceship, aeroplane engine, submarine engine, military weapons require lubricants





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