chemical engineering petroleum refinery engineering MCQs – Page 9

Practise multiple-choice questions from chemical engineering petroleum refinery engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering petroleum refinery engineering Mcqs
161. ______________ converts n-paraffins to i-paraffins ?
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A. Isomerisation

B. Alkylation

C. None of these

D. Polymerisation

162. Gum formation in stored gasoline is mainly due to the ____________________?
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A. Alkylation of unsaturated

B. Higher aromatic content

C. Presence of sulphur

D. Oxidation & polymerisation of unsaturated

163. Highest quality bitumen is produced from the __________________ crude oil?
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A. Intermediate

B. Naphthenic

C. Mixed

D. Paraffinic

164. Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic____________________?
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A. Cracking

B. Isomerisation

C. Reforming

D. Polymerisation

165. In case of liquid petrofuels, momentary combustion is observed at its ________________________?
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A. Flame temperature

B. Fire point

C. Preheating temperature corresponding to viscosity of 25 centistokes

D. Flash point
166. The conductivity of crude oil-water mixture depends on the__________________?
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A. Water percentage

B. Temperature

C. All A., B. and C.

D. pH value

167. Asphalts are _________________?
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A. Desirable in catalytic cracking feedstock, because they produce coke

B. Readily oxidisable and form carbonaceous sludge

C. All A., B. & C.

D. Low molecular weight & low boiling point compounds present in petroleum

168. Good quality kerosene should have__________________?
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A. Low paraffins content

B. High aromatics content

C. Low smoke point

D. High smoke point
169. Octane number of n-heptane is assumed to be_________________?
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A. 100

B. ?

C. 70

D. 0
170. Cracking is___________________?
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A. An endothermic reaction

B. None of these

C. Favoured at very low temperature

D. An exothermic reaction

171. Hydrogen percentage (by weight) in crude petroleum may be about __________________?
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A. 35

B. 25

C. 15

D. 5

172. Carbon percentage (by weight) in crude petroleum may be about_________________?
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A. 65

B. 95

C. 85

D. 75

173. Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about _______________ C ?
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A. 70

B. 50

C. 140

D. 90
174. In catalytic alkylation, higher iso-butane to olefin ratio gives_________________?
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A. Low final boiling point product

B. Higher yield

C. Both A. and B.

D. Neither A. nor B.

175. Which of the following categories of gasoline has the highest lead susceptibility ?
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A. Straight run gasoline

B. Polymer gasoline

C. Platinum reformed gasoline

D. Catalytical cracked gasoline

176. H/C ratio (by weight) for the same number of carbon atoms is the highest in case of____________________?
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A. Naphthenes

B. Olefins

C. Aromatics

D. Paraffins

177. Flash point of atmospheric distillation residue is determined by ______________ apparatus?
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A. None of these

B. Cleveland (open cup type)

C. Pensky-Martens (closed cup type)

D. Abel

178. Viscosity index of a lubricating oil_________________?
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A. Is the measure of variation of viscosity with temperature

B. Is the measure of its flash point

C. Should be low

D. None of these

179. Casing head gasoline is the liquid __________________?
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A. Gasoline separated from wet natural gas by compression

B. Propane

C. Butane

D. Natural gas

180. Octane number of gasoline produced by two stage fluidised catalytic cracking process is___________________?
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A. 97

B. 92

C. 87

D. 80