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  • Question
  • Which of the following gasolines (unleaded) has the least octane number?


  • Options
  • A. Catalytically cracked gasoline
  • B. Straight run gasoline
  • C. Catalytically reformed gasoline
  • D. Polymer gasoline

  • Correct Answer
  • Straight run gasoline 


  • Petroleum Refinery Engineering problems


    Search Results


    • 1. Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is

    • Options
    • A. more than 100
    • B. round about 100
    • C. between 50 and 100
    • D. less than 25
    • Discuss
    • 2. Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of

    • Options
    • A. thermal cracking
    • B. gum formation
    • C. coking
    • D. discoloration
    • Discuss
    • 3. Which parameter is used for the grading of paraffin waxes?

    • Options
    • A. Specific gravity
    • B. Melting point
    • C. Viscosity
    • D. Penetration number
    • Discuss
    • 4. Which of the followingis desirable in petrol (gasoline) but undesirable in kerosene?

    • Options
    • A. Paraffins
    • B. Aromatics
    • C. Mercaptans
    • D. Naphthenic acid
    • Discuss
    • 5. Lane and Garton classification of petroleum is based on its

    • Options
    • A. composition
    • B. specific gravity
    • C. optical properties
    • D. viscosity
    • Discuss
    • 6. Asphalts are

    • Options
    • A. low molecular weight & low boiling point compounds present in petroleum.
    • B. desirable in catalytic cracking feedstock, because they produce coke.
    • C. readily oxidisable and form carbonaceous sludge.
    • D. all (a), (b) & (c).
    • Discuss
    • 7. Salt content (measured as sodium chloride) in electrically desalted crude oil comes down to a level of about __________ ptb (pounds per thousand barrel).

    • Options
    • A. 0.03
    • B. 3
    • C. 35
    • D. 70
    • Discuss
    • 8. Products drawn from the top to bottom of the crude oil distillation column has progressively increasing

    • Options
    • A. boiling points
    • B. molecular weight
    • C. C/H ratio
    • D. all (a), (b) and (c)
    • Discuss
    • 9. Char value of Kerosene is the amount of charred oil deposition on the wick obtained after burning it in a standard wick lamp at a standard rate for 24 hours. Char value of a good quality kerosene should be less than __________ mg/kg of kerosene.

    • Options
    • A. 1
    • B. 20
    • C. 100
    • D. 500
    • Discuss
    • 10. Which of the following is the most important property for a jet fuel?

    • Options
    • A. Cloud point
    • B. Pour point
    • C. Colour
    • D. Freezing point
    • Discuss


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