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MCQs

Total Questions : 1622 | Page 21 of 163 pages
Question 201. Smoke point of a test sample of kerosene is found to be 15 mm. On removal of __________ from it, the smoke point rises to 25 mm.
  1.    N-paraffins
  2.    Olefins
  3.    Aromatics
  4.    None of these
 Discuss Question
Answer: Option C. -> Aromatics
Question 202. __________ test is done to find out the softening point of bitumen.
  1.    Impact
  2.    Ball and ring
  3.    Flame
  4.    Viscosity
 Discuss Question
Answer: Option B. -> Ball and ring
Question 203. Pick out the wrong statement.
  1.    Lower boiling paraffins have higher octane number than higher paraffins
  2.    Dehydrogenation of naphthenes to aromatics is a desirable reaction in reforming process
  3.    The most ideal feedstock for thermal reforming is dearomatised kerosene
  4.    Catalyst used in catalytic reforming is platinum on silica-alumina base
 Discuss Question
Answer: Option C. -> The most ideal feedstock for thermal reforming is dearomatised kerosene
Question 204. Which is an anticing compound?
  1.    Amyl nitrate
  2.    Alcohals
  3.    Mercaptans
  4.    Pyridine
 Discuss Question
Answer: Option B. -> Alcohals
Question 205. In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones.
  1.    Sulphur increases
  2.    Sulphur decreases
  3.    Nitrogen decreases
  4.    None of these
 Discuss Question
Answer: Option A. -> Sulphur increases
Question 206. Hydrocracking employs
  1.    High pressure & temperature
  2.    Low pressure & temperature
  3.    High pressure and low temperature
  4.    High temperature and low pressure
 Discuss Question
Answer: Option A. -> High pressure & temperature
Question 207. Naphthenic acid is represented by
  1.    CnH2n+2O₂
  2.    CnHsub>2n-2O₂
  3.    CnHsub>2n+2O₂ (n ≥ 6)
  4.    CnHsub>2n+6O₂ (n ≤ 6)
 Discuss Question
Answer: Option B. -> CnHsub>2n-2O₂
Question 208. Solvent used in duo-sol extraction for lube oil upgradation is a mixture of
  1.    Propane & phenol-cresol mixture
  2.    Methyl ethyl ketone & glycol
  3.    Phenol & furfural
  4.    Propane & liquid sulphur dioxide
 Discuss Question
Answer: Option A. -> Propane & phenol-cresol mixture
Question 209. Pick out the correct statement.
  1.    Paraffins have higher octane number than corresponding iso-paraffin
  2.    Paraffins have lower smoke point than aromatics
  3.    Suitability of kerosene as a fuel & as an illuminant may be determined by char value test
  4.    Aviation fuel should have very high cloud point
 Discuss Question
Answer: Option B. -> Paraffins have lower smoke point than aromatics
Question 210. Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API) ?
  1.    Diesel
  2.    Gasoline
  3.    Atmospheric gas oil
  4.    Vacuum gas oil
 Discuss Question
Answer: Option C. -> Atmospheric gas oil

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