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MCQs

Total Questions : 1622 | Page 5 of 163 pages
Question 41. Polymerisation
  1.    Produces i-octane from cracked gases containing i-butane and butene
  2.    Causes olefins to combine with each other
  3.    Causes aromatics to combine with each other
  4.    Is aimed at producing lubricating oil
 Discuss Question
Answer: Option B. -> Causes olefins to combine with each other
Question 42. Pour point of a petrofuel is
  1.    Multiple of 3°F
  2.    Multiple of 5°F
  3.    5°C below the temperature at which oil ceases to flow
  4.    None of these
 Discuss Question
Answer: Option C. -> 5°C below the temperature at which oil ceases to flow
Question 43. Presence of aromatics in
  1.    Diesel increases its cetane number
  2.    Kerosene increases its smoke point
  3.    Petrol increases its octane number
  4.    All of the above
 Discuss Question
Answer: Option C. -> Petrol increases its octane number
Question 44. Higher vapour pressure of gasoline indicates
  1.    Low flash point
  2.    High breathing loss
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option D. -> Neither A nor B
Question 45. Which of the following processes is used for the production of petroleum coke?
  1.    Stabilisation
  2.    Visbreaking
  3.    Cracking
  4.    Reforming
 Discuss Question
Answer: Option C. -> Cracking
Question 46. The most important property for a jet fuel is its
  1.    Viscosity
  2.    Freezing point
  3.    Calorific value
  4.    Flash point
 Discuss Question
Answer: Option B. -> Freezing point
Question 47. Mercaptans are added to liquefied petroleum gas (LPG) to
  1.    Reduce its cost
  2.    Narrow down its explosion limit
  3.    Assist in checking its leakage from cylinder
  4.    Increase its calorific value
 Discuss Question
Answer: Option C. -> Assist in checking its leakage from cylinder
Question 48. Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene.
  1.    Smoking tendency of hydrocarbons increases in the order : paraffins → isoparaffins → naphthenes → aromatics
  2.    Smoking tendency of paraffins increases with decrease in its molecular weight
  3.    Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond
  4.    Smoking tendency of aromatics decreases with increase in its molecular weight
 Discuss Question
Answer: Option B. -> Smoking tendency of paraffins increases with decrease in its molecular weight
Question 49. Solution used in Doctor's treatment for the removal of mercaptans is
  1.    Sodium hydroxide
  2.    Sodium plumbite
  3.    Cupric chloride
  4.    Potassium isobutyrate
 Discuss Question
Answer: Option B. -> Sodium plumbite
Question 50. Name the endothermic reaction out of the following:
  1.    Catalytic cracking
  2.    Hydrocracking
  3.    Dehydrogeneration of naphthene to produce aromatic
  4.    Catalytic polymerisation
 Discuss Question
Answer: Option C. -> Dehydrogeneration of naphthene to produce aromatic

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