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  • Question
  • The catalytic cracking of heavier petroleum fraction is done to produce mainly


  • Options
  • A. gasoline
  • B. asphalt
  • C. diesel oil
  • D. tar

  • Correct Answer
  • diesel oil 


  • Petroleum Refinery Engineering problems


    Search Results


    • 1. Operating temperature and pressure in catalytic reforming is about

    • Options
    • A. 1-5 Kgf/cm2 & 200°C.
    • B. 15-45 Kgf/cm2 & 450-550°C.
    • C. 50 - 75 kgf/cm2 & 600 - 800°C.
    • D. 5-10 kgf/cm2 & 150 - 250°C.
    • Discuss
    • 2. Choose the correct statement.

    • Options
    • A. Octane number of i-octane is zero.
    • B. Octane number of paraffins increases with increasing number of carbon atoms.
    • C. Branched chain paraffins have higher octane number than straight chain paraffins with same number of carbon atoms.
    • D. The aromatics have lower octane number than naphthenes with same number of carbon atoms.
    • Discuss
    • 3. Petroleum is believed to have originated from __________ sources.

    • Options
    • A. vegetable
    • B. animal
    • C. both (a) and (b)
    • D. neither (a) nor (b)
    • Discuss
    • 4. Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency?

    • Options
    • A. Paraffins
    • B. Naphthenes
    • C. Aromatics
    • D. Iso-paraffins
    • Discuss
    • 5. Smoke volatility index is equal to smoke point plus

    • Options
    • A. 0.42 x(% distilled at 204°C)
    • B. 5 mm
    • C. 0.84 x (% distilled at 204°C)
    • D. 10 mm. approximately
    • Discuss
    • 6. The characterisation factor of a crude oil is calculated as 12.5. It means that; it is

    • Options
    • A. paraffinic
    • B. naphthenic
    • C. intermediate
    • D. none of these
    • Discuss
    • 7. In hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen

    • Options
    • A. enhances the desulphurisation process.
    • B. minimises coke formation.
    • C. both (a) and (b).
    • D. neither (a) nor (b).
    • Discuss
    • 8. The doctor's solution comprises of sodium plumbite in

    • Options
    • A. alcohal
    • B. water
    • C. aqueous caustic soda
    • D. soda ash
    • Discuss
    • 9. Deoiling is the process of removal of oil from wax. It is done by the __________ process.

    • Options
    • A. solvent extraction
    • B. sweating
    • C. resettling
    • D. all (a), (b) & (c)
    • Discuss
    • 10. Hydrofining is the most recent and effective method for the

    • Options
    • A. removal of sulphur.
    • B. improvement of smoke point.
    • C. reduction of breathing loss.
    • D. improvement of viscosity index.
    • Discuss


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