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  • Question
  • Pick out the undesirable property for a solvent meant for dewaxing of lube oil.


  • Options
  • A. Complete miscibility with oil.
  • B. High solubility of wax in the solvent.
  • C. Both (a) and (b).
  • D. Neither (a) nor (b).

  • Correct Answer
  • Both (a) and (b). 


  • Petroleum Refinery Engineering problems


    Search Results


    • 1. Solution used in Doctor's treatment for the removal of mercaptans is

    • Options
    • A. sodium hydroxide
    • B. sodium plumbite
    • C. cupric chloride
    • D. potassium isobutyrate
    • Discuss
    • 2. __________ converts n-paraffins to i-paraffins.

    • Options
    • A. Alkylation
    • B. Polymerisation
    • C. Isomerisation
    • D. none of these
    • Discuss
    • 3. Catalyst used in catalytic reforming is

    • Options
    • A. platinum on alumina
    • B. nickel
    • C. iron
    • D. aluminium chloride
    • Discuss
    • 4. Tanks used for the storage of petroleum products (which are inflammable) should be painted with a __________ paint.

    • Options
    • A. black
    • B. white
    • C. red
    • D. yellow
    • Discuss
    • 5. The coking process normally mostly used in Indian oil refineries is the __________ coking process.

    • Options
    • A. delayed
    • B. flexi
    • C. fluid
    • D. contact
    • Discuss
    • 6. Stabilisation of gasoline (petrol) means

    • Options
    • A. removal of dissolved gases from it.
    • B. increasing its oxidation stability.
    • C. improving its lead susceptibility.
    • D. increasing its vapour pressure.
    • Discuss
    • 7. Most commonly used crude heater before the fractionation tower in a refinery is the __________ heater.

    • Options
    • A. electric immersion
    • B. pipestill
    • C. steam coil
    • D. none of these
    • Discuss
    • 8. True boiling point apparatus is used for the

    • Options
    • A. determination of characterisation factor.
    • B. evaluation of oil stocks.
    • C. determination of true vapour pressure.
    • D. none of these.
    • Discuss
    • 9. Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol.

    • Options
    • A. waxes
    • B. mercaptans
    • C. asphalt
    • D. diolefins
    • Discuss
    • 10. Flash point of atmospheric distillation residue is determined by __________ apparates.

    • Options
    • A. Pensky-Martens (closed cup type).
    • B. Abel.
    • C. Cleveland (open cup type)
    • D. none of these.
    • Discuss


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