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- Question
Pick out the correct statement pertaining to catalytic cracking.
Options- A. With increase in the reactor pressure, octane number of gasoline decreases.
- B. With increase in the reactor temperature, gasoline yield decreases for a given conversion.
- C. Percentage conversion increases with increase in the catalyst to oil ratio.
- D. all (a), (b) and (c).
- Correct Answer
- all (a), (b) and (c).
- 1. Sour crude means the __________ bearing crude.
Options- A. asphalt
- B. sulphur compounds
- C. wax
- D. nitrogen compounds Discuss
- 2. LPG when brought to atmospheric pressure & temperature will be a
Options- A. liquid lighter than water.
- B. liquid heavier than water.
- C. gas lighter than air.
- D. gas heavier than air. Discuss
- 3. Cetane number of alpha methyl naphthalene is assumed to be
Options- A. 0
- B. 100
- C. 50
- D. ? Discuss
- 4. Catalyst used in the catalytic polymerisation is
Options- A. phosphoric acid on kieselghur
- B. aluminium chloride
- C. nickel
- D. vanadium pentaoxide Discuss
- 5. The characterisation factor of crude petroleum oil is around
Options- A. 3
- B. 11
- C. 22
- D. 28 Discuss
- 6. Hydrocracking employs
Options- A. high pressure & temperature.
- B. low pressure & temperature.
- C. high pressure and low temperature.
- D. high temperature and low pressure. Discuss
- 7. Which of the following is an additive used for improving the cetane number of diesel?
Options- A. Tetraethyl lead
- B. Tetramethyllead
- C. Ethyl nitrate or acetone
- D. None of these Discuss
- 8. The general formula of naphthenes is
Options- A. CnH2n + 2
- B. CnH2n-6 (where, n ? 6)
- C. CnHn-4
- D. same as that for olefins i.e. CnH2n Discuss
- 9. The main purpose of recycling the byproduct hydrogen gas in the reformer reactor is to
Options- A. obviate catalyst poisoning.
- B. maintain the reaction temperature.
- C. sustain the reactor pressure.
- D. hydrogenate the feed stock. Discuss
- 10. Increase in the specific gravity of petroleum products indicates
Options- A. decrease in paraffin content.
- B. increase in thermal energy per unit weight.
- C. increase in aromatic content.
- D. higher H/C ratio. Discuss
Petroleum Refinery Engineering problems
Search Results
Correct Answer: sulphur compounds
Correct Answer: gas heavier than air.
Correct Answer: 0
Correct Answer: phosphoric acid on kieselghur
Correct Answer: 11
Correct Answer: high pressure & temperature.
Correct Answer: Tetraethyl lead
Correct Answer: same as that for olefins i.e. CnH2n
Correct Answer: sustain the reactor pressure.
Correct Answer: decrease in paraffin content.
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