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  • Question
  • The pressure (kg/cm2 ) and temperature (°C) maintained in electrical desalters for crude oil are respectively


  • Options
  • A. 10 and 120
  • B. 1 and 200
  • C. 50 and 250
  • D. 10 and 300

  • Correct Answer
  • 10 and 120 


  • Petroleum Refinery Engineering problems


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    • 1. Which is almost absent in crude petroleum?

    • Options
    • A. Olefins
    • B. Mercaptans
    • C. Naphthenes
    • D. Cycloparaffins
    • Discuss
    • 2. Presence of aromatics in

    • Options
    • A. diesel increases its cetane number.
    • B. kerosene increases its smoke point.
    • C. petrol increases its octane number.
    • D. all (a), (b) and (c).
    • Discuss
    • 3. Choose the correct statement regarding thermal cracking.

    • Options
    • A. Moderate changes in operating temperature does not change the depth of cracking.
    • B. Increased residence time results in the decreased severity of cracking.
    • C. At low pressure, the yield of lighter hydrocarbons are more.
    • D. Greater depth of cracking gives lower octane number gasoline.
    • Discuss
    • 4. The average boiling point of aviation turbine fuel is closest to that of

    • Options
    • A. lubricating oils
    • B. LPG
    • C. diesel
    • D. Kerosene
    • Discuss
    • 5. Antioxidants are added in petrol to

    • Options
    • A. impart colour to it, for easy identification.
    • B. minimise the gum formation.
    • C. prevent icing of the carburettor.
    • D. prevent the lead build up in engines.
    • Discuss
    • 6. Butadiene is a/an

    • Options
    • A. di-olefin
    • B. naphthene
    • C. aromatic
    • D. olefin
    • Discuss
    • 7. The first crude oil refinery of India is located at

    • Options
    • A. Naharkatiya
    • B. Digboi
    • C. Kochin
    • D. Madras
    • Discuss
    • 8. Pick out the wrong statement.

    • Options
    • A. Higher temperature is employed in visbreaking than in thermal cracking.
    • B. Pyrolysis is a mild thermal cracking process.
    • C. Lead suceptibility of petrol produced by catalytic process is more than that produced by thermal cracking.
    • D. Operating pressure and temperature in thermal cracking process is more than that in catalytic cracking process.
    • Discuss
    • 9. Sulphur content in lighter and heavier petroleum products is generally determined respectively by

    • Options
    • A. lamp method and bomb method.
    • B. bomb method and lamp method.
    • C. bomb method and quartz tube method.
    • D. quartz tube method and lamp method.
    • Discuss
    • 10. Phenols are added in gasoline to

    • Options
    • A. improve the octane number.
    • B. act as an antioxidant.
    • C. reduce its viscosity.
    • D. increase its pour point.
    • Discuss


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