Petroleum Refinery Engineering problems
- 1. Molecular weight of crude petroleum may be around
Options- A. 50
- B. 250
- C. 1500
- D. 5000 Discuss
Correct Answer: 1500
- 2. Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic
Options- A. cracking
- B. polymerisation
- C. reforming
- D. isomerisation Discuss
Correct Answer: reforming
- 3. Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 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. Discuss
Correct Answer: suppress coke formation.
- 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 Discuss
Correct Answer: 8
- 5. 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 Discuss
Correct Answer: Colour comparator
- 6. 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. Discuss
Correct Answer: gives higher yield of petrol.
- 7. 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 Discuss
Correct Answer: lubricating oil > diesel > petrol > LPG
- 8. 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. Discuss
Correct Answer: minimise the gum formation.
- 9. The average boiling point of aviation turbine fuel is closest to that of
Options- A. lubricating oils
- B. LPG
- C. diesel
- D. Kerosene Discuss
Correct Answer: Kerosene
- 10. 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. Discuss
Correct Answer: Greater depth of cracking gives lower octane number gasoline.
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