Petroleum Refinery Engineering Journal Questions Answers - Set 07 - ObjectiveBooks
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Petroleum Refinery Engineering Journal Questions Answers - Set 07

Practice Test: Question Set - 07


1. True vapor pressure of a petroleum fraction __________ Reid vapor pressure.
    (A) Is less than
    (B) Is more than
    (C) Is same as
    (D) May be either more or less than

2. Higher pressure in the reforming reactor
    (A) Increases coke formation
    (B) Increases the rate of reaction
    (C) Produces high octane number gasoline
    (D) None of these

3. Pick out the wrong statement.
    (A) Higher temperature is employed in visbreaking than in thermal cracking
    (B) Pyrolysis is a mild thermal cracking process
    (C) Lead susceptibility of petrol produced by catalytic process is more than that produced by thermal cracking
    (D) Operating pressure and temperature in thermal cracking process is more than that in catalytic cracking process

4. Liquefied Petroleum Gas (LPG) in domestic use cylinders is in the liquid form. The density of LPG in liquid form is about __________ of that of water (i.e. 1 gm/c.c).
    (A) One fourth
    (B) One third
    (C) Half
    (D) One eighth

5. The characterization factor of crude petroleum oil is around
    (A) 3
    (B) 11
    (C) 22
    (D) 28

6. Pick out the wrong statement.
    (A) Pensky-Marten apparatus is used for determining flash points above 50°C
    (B) Characterization factor of paraffinic crude oil is more than 12
    (C) Abel apparatus is used for determining flash points below 50°C
    (D) An oil having high susceptibility to change in viscosity with temperature changes, has a high viscosity index

7. Molecular weight of crude petroleum may be around
    (A) 50
    (B) 250
    (C) 1500
    (D) 5000

8. Pour point of a petrofuel is
    (A) Multiple of 3°F
    (B) Multiple of 5°F
    (C) 5°C below the temperature at which oil ceases to flow
    (D) None of these

9. Octane number (unleaded) of gasoline produced by isomerization of butane may be about
    (A) 45
    (B) 55
    (C) 70
    (D) 90

10. Which of the following is not a sulphur compound present in petroleum?
    (A) Thiophenes
    (B) Mercaptans
    (C) Sulphones
    (D) Pyrroles

11. Refractive index of a petrofuel which is the ratio of velocity of light in air to its velocity in the petrofuel gives an indication if its
    (A) Molecular weight
    (B) Aromatics content
    (C) Both ‘a’ & ‘b’
    (D) Neither ‘a’ nor ‘b’

12. Most widely used solvent for dewaxing is
    (A) Methyl-ethyl-ketone (MEK)
    (B) Naphtha
    (C) Petroleum ether
    (D) Sodium plumbite

13. 'Solvent naphtha' used mostly as a solvent in paints and perfumery is produced by the __________ of virgin naphtha into small boiling range cuts.
    (A) Steam reforming
    (B) Distillation
    (C) Desulphurisation
    (D) None of these

14. Extractor temperature is maintained at -20°C in Edeleanu process to reduce the __________ of kerosene.
    (A) Smoke point
    (B) Paraffins
    (C) Aromatics
    (D) Naphthenes

15. Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic
    (A) Cracking
    (B) Polymerization
    (C) Reforming
    (D) Isomerization

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