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  • Question
  • Pick out the wrong statement.


  • Options
  • A. Multigrade lubricating oils have high viscosity index.
  • B. Paraffinic oil has very high viscosity index.
  • C. Naphthenic oil has very low viscosity index.
  • D. High viscosity index means a large change in viscosity with change in temperature.

  • Correct Answer
  • High viscosity index means a large change in viscosity with change in temperature. 


  • Petroleum Refinery Engineering problems


    Search Results


    • 1. Which of the following processes consumes hydrogen?

    • Options
    • A. Fluid catalytic cracking
    • B. Visbreaking
    • C. Propane deasphalting
    • D. None of these
    • Discuss
    • 2. Crude petroleum oil is a __________ fuel.

    • Options
    • A. primary
    • B. fossil
    • C. both (a) & (b)
    • D. secondary
    • Discuss
    • 3. In catalytic cracking process, olefins crack __________ times faster than in thermal cracking process.

    • Options
    • A. 100
    • B. 200-300
    • C. 1000-10000
    • D. 10
    • Discuss
    • 4. Solvent used in the Udex (glycol) extraction process for removal of light aromatics from cracked naphtha is

    • Options
    • A. propane.
    • B. diethylene glycol.
    • C. aqueous solution (10% water) of diethylene glycol.
    • D. methyl ethyl ketone (MEK).
    • Discuss
    • 5. In catalytic alkylation, higher iso-butane to olefin ratio gives

    • Options
    • A. low final boiling point product
    • B. higher yield
    • C. both (a) and (b)
    • D. neither (a) nor (b)
    • Discuss
    • 6. Crude oil produced by Indian oil fields are predominantly __________ in nature.

    • Options
    • A. paraffinic
    • B. naphthenic
    • C. asphaltic
    • D. mixed base
    • Discuss
    • 7. Which of the following has the maximum °API gravity of all?

    • Options
    • A. Diesel
    • B. Kerosene
    • C. Petrol
    • D. Furnace oil
    • Discuss
    • 8. Main constituent of natural gas is

    • Options
    • A. CH4
    • B. C2H2
    • C. C2H4
    • D. C2H6
    • Discuss
    • 9. Sulphuric acid treatment of petroleum products removes the __________ materials.

    • Options
    • A. gum forming
    • B. color forming
    • C. asphaltic
    • D. all (a), (b) & (c)
    • Discuss
    • 10. Which of the following has the highest viscosity of all (at a given temperature)?

    • Options
    • A. Naphtha
    • B. Fuel oil
    • C. Light diesel oil
    • D. Petrol
    • Discuss


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