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- Question
Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of
Options- A. thermal cracking
- B. gum formation
- C. coking
- D. discoloration
- Correct Answer
- coking
- 1. Which parameter is used for the grading of paraffin waxes?
Options- A. Specific gravity
- B. Melting point
- C. Viscosity
- D. Penetration number Discuss
- 2. Which of the followingis desirable in petrol (gasoline) but undesirable in kerosene?
Options- A. Paraffins
- B. Aromatics
- C. Mercaptans
- D. Naphthenic acid Discuss
- 3. Lane and Garton classification of petroleum is based on its
Options- A. composition
- B. specific gravity
- C. optical properties
- D. viscosity Discuss
- 4. Octane number (unleaded) of reformed gasoline may be upto
Options- A. 60
- B. 70
- C. 80
- D. 90 Discuss
- 5. Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute).
Options- A. 5-10
- B. 30-80
- C. 150-250
- D. 350-400 Discuss
- 6. Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is
Options- A. more than 100
- B. round about 100
- C. between 50 and 100
- D. less than 25 Discuss
- 7. Which of the following gasolines (unleaded) has the least octane number?
Options- A. Catalytically cracked gasoline
- B. Straight run gasoline
- C. Catalytically reformed gasoline
- D. Polymer gasoline Discuss
- 8. Asphalts are
Options- A. low molecular weight & low boiling point compounds present in petroleum.
- B. desirable in catalytic cracking feedstock, because they produce coke.
- C. readily oxidisable and form carbonaceous sludge.
- D. all (a), (b) & (c). Discuss
- 9. Salt content (measured as sodium chloride) in electrically desalted crude oil comes down to a level of about __________ ptb (pounds per thousand barrel).
Options- A. 0.03
- B. 3
- C. 35
- D. 70 Discuss
- 10. Products drawn from the top to bottom of the crude oil distillation column has progressively increasing
Options- A. boiling points
- B. molecular weight
- C. C/H ratio
- D. all (a), (b) and (c) Discuss
Petroleum Refinery Engineering problems
Search Results
Correct Answer: Viscosity
Correct Answer: Mercaptans
Correct Answer: specific gravity
Correct Answer: 90
Correct Answer: 30-80
Correct Answer: more than 100
Correct Answer: Straight run gasoline
Correct Answer: readily oxidisable and form carbonaceous sludge.
Correct Answer: 3
Correct Answer: all (a), (b) and (c)
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