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  • Question
  • 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.

  • Correct Answer
  • Higher temperature is employed in visbreaking than in thermal cracking. 


  • Petroleum Refinery Engineering problems


    Search Results


    • 1. The first crude oil refinery of India is located at

    • Options
    • A. Naharkatiya
    • B. Digboi
    • C. Kochin
    • D. Madras
    • Discuss
    • 2. Butadiene is a/an

    • Options
    • A. di-olefin
    • B. naphthene
    • C. aromatic
    • D. olefin
    • Discuss
    • 3. 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
    • Discuss
    • 4. Which is almost absent in crude petroleum?

    • Options
    • A. Olefins
    • B. Mercaptans
    • C. Naphthenes
    • D. Cycloparaffins
    • Discuss
    • 5. 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
    • 6. 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
    • 7. 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
    • 8. Removal of light fractions from crude oil is called its

    • Options
    • A. sweetening
    • B. dehydration
    • C. stabilisation
    • D. visbreaking
    • Discuss
    • 9. Higher viscosity of lubricating oil usually signifies

    • Options
    • A. lower Reid vapour pressure.
    • B. higher acid number.
    • C. higher flash point and fire point.
    • D. lower flash point and fire point.
    • Discuss
    • 10. Which of the following has the lowest flash point of all?

    • Options
    • A. Diesel
    • B. Kerosene
    • C. Petrol
    • D. Furnace oil
    • Discuss


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