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  • Question

  • Cetane number of diesel used in trucks may be about


  • Options
  • A. 50
  • B. 14
  • C. 35
  • D. 85

  • Correct Answer
  • 50 

    Explanation
    Generally, diesel engines operate well with a Cetane number from 40 to 55.

    • Petroleum Refinery Engineering problems

    Search Results

    • 1. Casing head gasoline is the liquid

    • Options
    • A. butane.
    • B. propane.
    • C. natural gas.
    • D. gasoline separated from wet natural gas by compression.
      • Discuss
    • 2. Mercaptans are

    • Options
    • A. low boiling sulphur compounds.
    • B. added in LPG cylinders to detect gas leakage by its smell.
    • C. undesirable in petrol, as they reduce its octane number.
    • D. all (a), (b) and (c)
      • Discuss
    • 3. Octane number of gasoline is a measure of its

    • Options
    • A. resistance to knock.
    • B. ignition delay.
    • C. ignition temperature.
    • D. smoke point.
      • Discuss
    • 4. Visbreaking process is used mainly for making

    • Options
    • A. high cetane diesel
    • B. high octane gasoline
    • C. fuel oil
    • D. smoke free kerosene
      • Discuss
    • 5. Diesel used in naval applications has a minimum cetane number of

    • Options
    • A. 25
    • B. 35
    • C. 45
    • D. 65
      • Discuss
    • 6. Pour point and freezing point is equal for

    • Options
    • A. petrol
    • B. diesel
    • C. water
    • D. crude petroleum
      • Discuss
    • 7. Furfural solvent extraction is used for upgrading (by dissolving aromatics)

    • Options
    • A. naphtha
    • B. lubricating oils
    • C. wax
    • D. cracking feedstock
      • Discuss
    • 8. The octane number of aviation gasoline may be

    • Options
    • A. 79
    • B. 87
    • C. 97
    • D. >100
      • Discuss
    • 9. Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API)?

    • Options
    • A. Diesel
    • B. Gasoline
    • C. Atmospheric gas oil
    • D. Vacuum gas oil
      • Discuss
    • 10. Flash point of an oil gives an idea of the

    • Options
    • A. nature of boiling point diagram of the system.
    • B. amount of low boiling fraction present.
    • C. explosion hazards.
    • D. all (a), (b) and (c).
      • Discuss

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