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MCQs

Total Questions : 1622 | Page 4 of 163 pages
Question 31. Which is almost absent in crude petroleum?
  1.    Olefins
  2.    Mercaptans
  3.    Naphthenes
  4.    Cycloparaffins
 Discuss Question
Answer: Option B. -> Mercaptans
Question 32. Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.
  1.    1 to 5
  2.    30 to 80
  3.    250 to 350
  4.    450 to 500
 Discuss Question
Answer: Option B. -> 30 to 80
Question 33. The yield of straight run LPG from crude oil is about __________ weight percent.
  1.    20-25
  2.    1-1.5
  3.    10-15
  4.    0.1-0.2
 Discuss Question
Answer: Option B. -> 1-1.5
Question 34. Sulphuric acid treatment of petroleum products removes the __________ materials.
  1.    Gum forming
  2.    Color forming
  3.    Asphaltic
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 35. 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 ?
  1.    Naphtha
  2.    Petrol
  3.    Kerosene
  4.    Heavy fuel oil
 Discuss Question
Answer: Option D. -> Heavy fuel oil
Question 36. Which of the following is the easiest to crack?
  1.    Paraffins
  2.    Olefins
  3.    Naphthenes
  4.    Aromatics
 Discuss Question
Answer: Option A. -> Paraffins
Question 37. Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic
  1.    Cracking
  2.    Polymerisation
  3.    Reforming
  4.    Isomerisation
 Discuss Question
Answer: Option C. -> Reforming
Question 38. Petrolatum is
  1.    Same as petroleum ether
  2.    Petroleum coke
  3.    A mixture of microcrystalline wax in viscous hydrocarbon liquids
  4.    None of these
 Discuss Question
Answer: Option C. -> A mixture of microcrystalline wax in viscous hydrocarbon liquids
Question 39. Petroleum
  1.    Is optically active
  2.    Constitutes mainly of olefins
  3.    Does not contain asphalt
  4.    Does not contain aromatics
 Discuss Question
Answer: Option A. -> Is optically active
Question 40. Pick out the wrong statement.
  1.    Multigrade lubricating oils have high viscosity index
  2.    Paraffinic oil has very high viscosity index
  3.    Naphthenic oil has very low viscosity index
  4.    High viscosity index means a large change in viscosity with change in temperature
 Discuss Question
Answer: Option D. -> High viscosity index means a large change in viscosity with change in temperature

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