Discussion
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- Question
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
- Correct Answer
- Tetraethyl lead
- 1. Hydrocracking employs
Options- A. high pressure & temperature.
- B. low pressure & temperature.
- C. high pressure and low temperature.
- D. high temperature and low pressure. Discuss
- 2. 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). Discuss
- 3. Sour crude means the __________ bearing crude.
Options- A. asphalt
- B. sulphur compounds
- C. wax
- D. nitrogen compounds Discuss
- 4. 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
- 5. Cetane number of alpha methyl naphthalene is assumed to be
Options- A. 0
- B. 100
- C. 50
- D. ? Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. Crude topping column operates at __________ pressure.
Options- A. atmospheric
- B. 10 atm
- C. vacuum
- D. 3 atm. Discuss
- 10. Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C?
Options- A. Naphtha
- B. Petrol
- C. Kerosene
- D. Heavy fuel oil Discuss
Petroleum Refinery Engineering problems
Search Results
Correct Answer: high pressure & temperature.
Correct Answer: all (a), (b) and (c).
Correct Answer: sulphur compounds
Correct Answer: gas heavier than air.
Correct Answer: 0
Correct Answer: same as that for olefins i.e. CnH2n
Correct Answer: sustain the reactor pressure.
Correct Answer: decrease in paraffin content.
Correct Answer: atmospheric
Correct Answer: Heavy fuel oil
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