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MCQs

Total Questions : 1622 | Page 18 of 163 pages
Question 171. Crude topping column operates at __________ pressure.
  1.    Atmospheric
  2.    10 atm
  3.    Vacuum
  4.    3 atm
 Discuss Question
Answer: Option A. -> Atmospheric
Question 172. Mercaptans is represented as (where R and R' are alkyl groups)
  1.    R-COOH
  2.    R-S-H
  3.    R-S-R
  4.    R-S-R'
 Discuss Question
Answer: Option B. -> R-S-H
Question 173. Which of the following is not an important property of fuel oil/furnace oil?
  1.    Sulphur content
  2.    Viscosity
  3.    Aniline point
  4.    Flash point
 Discuss Question
Answer: Option C. -> Aniline point
Question 174. Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is __________ centistokes (or 100 Redwood I seconds).
  1.    5
  2.    25
  3.    50
  4.    100
 Discuss Question
Answer: Option B. -> 25
Question 175. LPG when brought to atmospheric pressure & temperature will be a
  1.    Liquid lighter than water
  2.    Liquid heavier than water
  3.    Gas lighter than air
  4.    Gas heavier than air
 Discuss Question
Answer: Option D. -> Gas heavier than air
Question 176. Water separometer index (modified) (WSIM) of a petrofuel is the measure of its
  1.    Emulsification tendency
  2.    Water separation characteristics
  3.    Water content
  4.    Water absorbing capacity from atmosphere
 Discuss Question
Answer: Option B. -> Water separation characteristics
Question 177. Which of the following fractions of petroleum contains maximum sulphur?
  1.    Diesel
  2.    Gasoline
  3.    Naphtha
  4.    Atmospheric residue
 Discuss Question
Answer: Option D. -> Atmospheric residue
Question 178. Pick out the additive property of a lube oil out of following.
  1.    °API gravity
  2.    Specific gravity
  3.    Viscosity
  4.    Flashpoint
 Discuss Question
Answer: Option A. -> °API gravity
Question 179. Pick out the wrong statement.
  1.    Aromatics have higher specific gravity than paraffins
  2.    Gross calorific value (GCV) of petrofuels is equal to (12400 - 2100 ρ2) where, ρ is the specific gravity of the fuel at 15.5°C
  3.    Heavier petrofuels have higher GCV on weight basis (i.e., Kcal/kg) but lower GCV on volume basis (i.e., Kcal/litre)
  4.    Higher specific gravity of petrofuels means higher C/H ratio
 Discuss Question
Answer: Option C. -> Heavier petrofuels have higher GCV on weight basis (i.e., Kcal/kg) but lower GCV on volume basis (i.e., Kcal/litre)
Question 180. Molecular weight of crude oil is in the range of
  1.    100-120
  2.    230-250
  3.    450-550
  4.    600-850
 Discuss Question
Answer: Option B. -> 230-250

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