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  • Question
  • Solvent used in duo-sol extraction for lube oil upgradation is a mixture of


  • Options
  • A. propane & phenol-cresol mixture.
  • B. methyl ethyl ketone & glycol.
  • C. phenol & furfural.
  • D. propane & liquid sulphur dioxide.

  • Correct Answer
  • propane & phenol-cresol mixture. 


  • Petroleum Refinery Engineering problems


    Search Results


    • 1. Which of the following tests is not done for transformer oil?

    • Options
    • A. Flash point and acid value.
    • B. Aniline point.
    • C. Dielectric strength.
    • D. Copper strip corrosion test.
    • Discuss
    • 2. In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones.

    • Options
    • A. sulphur increases
    • B. sulphur decreases
    • C. nitrogen decreases
    • D. none of these
    • Discuss
    • 3. __________ determination is not a very significant and important test for gasoline.

    • Options
    • A. Gum & sulphur content
    • B. Viscosity
    • C. Octane number
    • D. Reid vapor pressure
    • Discuss
    • 4. Diesel index.(an alternative index for expressing the quality of diesel) is

    • Options
    • A. determined by using a test engine.
    • B. not related to aniline point.
    • C. equal to cetane number plus 3.
    • D. all (a), (b) & (c).
    • Discuss
    • 5. Power required to drive a ball mill with a particular ball load is proportional to (where, D = diameter of ball mill )

    • Options
    • A. D
    • B. 1/D
    • C. D2.5
    • D. 1/D2.5
    • Discuss
    • 6. Which of the following is used as a catalyst in fluidised bed catalytic cracking?

    • Options
    • A. Silica-magnesia
    • B. Silica-alumina
    • C. Bentonite clays
    • D. All (a), (b) and (c)
    • Discuss
    • 7. Which of the following constituents present in petroleum is responsible for ash formation?

    • Options
    • A. Nitrogen compounds
    • B. Organometallic compounds
    • C. Sulphur compounds
    • D. Oxygen compounds
    • Discuss
    • 8. Catalytic desulphurisation process used for sweetening of straight run gasoline and kerosene uses __________ as catalyst.

    • Options
    • A. bauxite
    • B. fuller's earth
    • C. activated clay
    • D. all (a), (b) & (c)
    • Discuss
    • 9. Smoke point of a test sample of kerosene is found to be 15 mm. On removal of __________ from it, the smoke point rises to 25 mm.

    • Options
    • A. n-paraffins
    • B. olefins
    • C. aromatics
    • D. none of these
    • Discuss
    • 10. The main use of heavy gas oil produced by the vacuum distillation unit is as a

    • Options
    • A. blending component for kerosene.
    • B. blending component for petrol.
    • C. feedstock for fluid catalytic cracking unit.
    • D. none of these.
    • Discuss


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