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Petroleum Refinery Engineering
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Question
Presence of aromatics in
Options
A. diesel increases its cetane number.
B. kerosene increases its smoke point.
C. petrol increases its octane number.
D. all (a), (b) and (c).
Correct Answer
petrol increases its octane number.
Petroleum Refinery Engineering problems
Search Results
1. Choose the correct statement regarding thermal cracking.
Options
A. Moderate changes in operating temperature does not change the depth of cracking.
B. Increased residence time results in the decreased severity of cracking.
C. At low pressure, the yield of lighter hydrocarbons are more.
D. Greater depth of cracking gives lower octane number gasoline.
Show Answer
Scratch Pad
Discuss
Correct Answer: Greater depth of cracking gives lower octane number gasoline.
2. The average boiling point of aviation turbine fuel is closest to that of
Options
A. lubricating oils
B. LPG
C. diesel
D. Kerosene
Show Answer
Scratch Pad
Discuss
Correct Answer: Kerosene
3. Antioxidants are added in petrol to
Options
A. impart colour to it, for easy identification.
B. minimise the gum formation.
C. prevent icing of the carburettor.
D. prevent the lead build up in engines.
Show Answer
Scratch Pad
Discuss
Correct Answer: minimise the gum formation.
4. The proper arrangement of the petroleum fractions in order of their boiling points is
Options
A. lubricating oil > diesel > petrol > LPG
B. lubricating oil > petrol > diesel > LPG
C. petrol > lubricating oil > diesel > LPG
D. petrol > diesel > LPG > lubricating oil
Show Answer
Scratch Pad
Discuss
Correct Answer: lubricating oil > diesel > petrol > LPG
5. Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil
Options
A. gives higher yield of petrol.
B. lower octane number of petrol.
C. higher sulphur content in the product.
D. higher gum forming material in petrol.
Show Answer
Scratch Pad
Discuss
Correct Answer: gives higher yield of petrol.
6. Which is almost absent in crude petroleum?
Options
A. Olefins
B. Mercaptans
C. Naphthenes
D. Cycloparaffins
Show Answer
Scratch Pad
Discuss
Correct Answer: Mercaptans
7. The pressure (kg/cm
2
) and temperature (°C) maintained in electrical desalters for crude oil are respectively
Options
A. 10 and 120
B. 1 and 200
C. 50 and 250
D. 10 and 300
Show Answer
Scratch Pad
Discuss
Correct Answer: 10 and 120
8. Butadiene is a/an
Options
A. di-olefin
B. naphthene
C. aromatic
D. olefin
Show Answer
Scratch Pad
Discuss
Correct Answer: di-olefin
9. The first crude oil refinery of India is located at
Options
A. Naharkatiya
B. Digboi
C. Kochin
D. Madras
Show Answer
Scratch Pad
Discuss
Correct Answer: Digboi
10. Pick out the wrong statement.
Options
A. Higher temperature is employed in visbreaking than in thermal cracking.
B. Pyrolysis is a mild thermal cracking process.
C. Lead suceptibility 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.
Show Answer
Scratch Pad
Discuss
Correct Answer: Higher temperature is employed in visbreaking than in thermal cracking.
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