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MCQs

Total Questions : 1622 | Page 12 of 163 pages
Question 111. Visbreaking
  1.    Uses natural gas as feed
  2.    Is carried out at atmospheric pressure
  3.    Produces fuel oil of lower viscosity
  4.    Produces gasoline only
 Discuss Question
Answer: Option C. -> Produces fuel oil of lower viscosity
Question 112. Smoke volatility index is equal to smoke point plus
  1.    0.42 x(% distilled at 204°C)
  2.    5 mm
  3.    0.84 x (% distilled at 204°C)
  4.    10 mm. approximately
 Discuss Question
Answer: Option A. -> 0.42 x(% distilled at 204°C)
Question 113. Antioxidants are added in petrol to
  1.    Impart colour to it, for easy identification
  2.    Minimise the gum formation
  3.    Prevent icing of the carburettor
  4.    Prevent the lead build up in engines
 Discuss Question
Answer: Option B. -> Minimise the gum formation
Question 114. Solvent used for dewaxing of petroleum products are
  1.    Furfural
  2.    Methyl ethyl ketone (MEK)
  3.    Propane
  4.    Both B & C
 Discuss Question
Answer: Option C. -> Propane
Question 115. Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about __________ ppm.
  1.    1
  2.    50
  3.    5000
  4.    10000
 Discuss Question
Answer: Option B. -> 50
Question 116. A typical yield of diesel in straight run distillation of crude oil may be about __________ percent.
  1.    8
  2.    18
  3.    28
  4.    35
 Discuss Question
Answer: Option A. -> 8
Question 117. A typical yield of kerosene in straight run distillation of crude oil may be about __________ percent.
  1.    4
  2.    10
  3.    18
  4.    26
 Discuss Question
Answer: Option B. -> 10
Question 118. Naphtha yield in straight run distillation of crude oil may be about __________ percent.
  1.    2
  2.    6
  3.    12
  4.    18
 Discuss Question
Answer: Option B. -> 6
Question 119. Most widely used solvent for dewaxing is
  1.    Methyl-ethyl-ketone (MEK)
  2.    Naphtha
  3.    Petroleum ether
  4.    Sodium plumbite
 Discuss Question
Answer: Option A. -> Methyl-ethyl-ketone (MEK)
Question 120. Which of the following processes in oil refinery does not employ 'cracking'?
  1.    Coking
  2.    Visbreaking
  3.    Pyrolysis
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these

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