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Chemical Engineering
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Petroleum Refinery Engineering
Comments
Question
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.
Correct Answer
minimise the gum formation.
Petroleum Refinery Engineering problems
Search Results
1. 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
2. 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.
3. Which one is used to determine the colour of petroleum products?
Options
A. Colour comparator
B. Saybolt chromometer
C. Cleveland apparatus
D. None of these
Show Answer
Scratch Pad
Discuss
Correct Answer: Colour comparator
4. A typical yield of diesel in straight run distillation of crude oil may be about __________ percent.
Options
A. 8
B. 18
C. 28
D. 35
Show Answer
Scratch Pad
Discuss
Correct Answer: 8
5. Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm
2
is maintained during cracking mainly to
Options
A. increase the yield of light distillates.
B. suppress coke formation.
C. enhance the octane number of gasoline.
D. reduce gum content in gasoline.
Show Answer
Scratch Pad
Discuss
Correct Answer: suppress coke formation.
6. 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
7. 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.
8. 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).
Show Answer
Scratch Pad
Discuss
Correct Answer: petrol increases its octane number.
9. Which is almost absent in crude petroleum?
Options
A. Olefins
B. Mercaptans
C. Naphthenes
D. Cycloparaffins
Show Answer
Scratch Pad
Discuss
Correct Answer: Mercaptans
10. 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
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