Petroleum Refinery Engineering problems
- 1. Cetane number of diesel used in trucks may be about
Options- A. 50
- B. 14
- C. 35
- D. 85 Discuss
Correct Answer: 50
Explanation:
Generally, diesel engines operate well with a Cetane number from 40 to 55.
- 2. Pour point and freezing point is equal for
Options- A. petrol
- B. diesel
- C. water
- D. crude petroleum Discuss
Correct Answer: water
- 3. Furfural solvent extraction is used for upgrading (by dissolving aromatics)
Options- A. naphtha
- B. lubricating oils
- C. wax
- D. cracking feedstock Discuss
Correct Answer: lubricating oils
- 4. The octane number of aviation gasoline may be
Options- A. 79
- B. 87
- C. 97
- D. >100 Discuss
Correct Answer: >100
- 5. Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API)?
Options- A. Diesel
- B. Gasoline
- C. Atmospheric gas oil
- D. Vacuum gas oil Discuss
Correct Answer: Gasoline
- 6. Flash point of an oil gives an idea of the
Options- A. nature of boiling point diagram of the system.
- B. amount of low boiling fraction present.
- C. explosion hazards.
- D. all (a), (b) and (c). Discuss
Correct Answer: all (a), (b) and (c).
- 7. Illuminating characteristics of kerosene is expressed by its
Options- A. smoke point
- B. aniline point
- C. luminosity number
- D. aromatic content Discuss
Correct Answer: luminosity number
- 8. Which is the most undesirable component in kerosene?
Options- A. Aromatics
- B. i-paraffins
- C. n-paraffins
- D. Naphthenes Discuss
Correct Answer: Aromatics
- 9. Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene.
Options- A. Smoking tendency of hydrocarbons increases in the order : paraffins ? isoparaffins ? naphthenes ? aromatics.
- B. Smoking tendency of paraffins increases with decrease in its molecular weight.
- C. Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond.
- D. Smoking tendency of aromatics decreases with increase in its molecular weight. Discuss
Correct Answer: Smoking tendency of paraffins increases with decrease in its molecular weight.
- 10. Which of the following has the lowest viscosity (at a given temperature) of all?
Options- A. Naphtha
- B. Kerosene
- C. Diesel
- D. Lube oil Discuss
Correct Answer: Naphtha
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