Lubricants MCQ Questions and Answers Quiz

11. Identify the odd type of lubricant from following

  1. Semi solid
  2. Liquid
  3. Gaseous
  4. Solid

12. Important extreme pressure additives contains functional group from following

  1. Chlorides
  2. Sulphides
  3. Phosphides
  4. All of above

13. Length of hydrocarbon chain in petroleum oils varies between about

  1. 0 to 12 Carbon atoms
  2. 0 to 50 Carbon atoms
  3. 21 to 30 Carbon atoms
  4. 12 to 50 Carbon atoms

14. Minimum separating distance in hydrodynamic lubrication is

  1. 100 A0
  2. 1000 A0
  3. 10000 A0
  4. 10 A0

15. Special additives added to mineral oils are known as

  1. Extreme pressure additives
  2. Special additives
  3. Mineral additives
  4. Lubricating additives

16. What type of lubrication is used in delicate machines like watches, sewing machines, etc?

  1. Fluid film lubrication
  2. Extreme lubrication
  3. Boundary lubrication
  4. Thin film lubrication

17. What type of oil is suitable for thick film lubrication?

  1. Hydrocarbon oil
  2. Mineral oil
  3. Polymeric oil
  4. None of above
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Lubricants Question and Answer

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