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MCQs

Total Questions : 1622 | Page 13 of 163 pages
Question 121. Pick out the wrong statement.
  1.    Iso-paraffin crack faster than n-paraf-fin
  2.    Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic
  3.    Rate of decomposition of olefins in catalytic cracking is slightly slower than the thermal cracking
  4.    None of these
 Discuss Question
Answer: Option B. -> Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic
Question 122. Percentage of straight run gasoline in a typical crude oil may be around
  1.    6
  2.    18
  3.    38
  4.    52
 Discuss Question
Answer: Option D. -> 52
Question 123. Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about
  1.    0.1
  2.    1
  3.    2.5
  4.    3.5
 Discuss Question
Answer: Option B. -> 1
Question 124. Which one is used to determine the colour of petroleum products?
  1.    Colour comparator
  2.    Saybolt chromometer
  3.    Cleveland apparatus
  4.    None of these
 Discuss Question
Answer: Option A. -> Colour comparator
Question 125. Cracking is
  1.    An exothermic reaction
  2.    An endothermic reaction
  3.    Favoured at very low temperature
  4.    None of these
 Discuss Question
Answer: Option B. -> An endothermic reaction
Question 126. During electrical desalting of crude oil, the electrical conductivity of a mixture of crude oil and water (which ranges between 3 to 8% water) __________ with increase in the amount of water.
  1.    Decreases
  2.    Increases
  3.    Remains unchanged
  4.    Decreases linearly
 Discuss Question
Answer: Option B. -> Increases
Question 127. Aromatics are desired constituents of
  1.    Lubricating oil
  2.    Diesel
  3.    Kerosene
  4.    Petrol
 Discuss Question
Answer: Option D. -> Petrol
Question 128. Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil
  1.    Gives higher yield of petrol
  2.    Lower octane number of petrol
  3.    Higher sulphur content in the product
  4.    Higher gum forming material in petrol
 Discuss Question
Answer: Option A. -> Gives higher yield of petrol
Question 129. __________ determination is not a very significant and important test for gasoline.
  1.    Gum & sulphur content
  2.    Viscosity
  3.    Octane number
  4.    Reid vapor pressure
 Discuss Question
Answer: Option B. -> Viscosity
Question 130. The main use of heavy gas oil produced by the vacuum distillation unit is as a
  1.    Blending component for kerosene
  2.    Blending component for petrol
  3.    Feedstock for fluid catalytic cracking unit
  4.    None of these
 Discuss Question
Answer: Option C. -> Feedstock for fluid catalytic cracking unit

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