chemical engineering petroleum refinery engineering MCQs – Page 13

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 Review each marked answer and report any item that may be outdated or unclear.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

241. Higher viscosity of lubricating oil usually signifies_______________________?
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A. Higher flash point and fire point

B. Lower flash point and fire point

C. Lower Reid vapour pressure

D. Higher acid number

242. Smoke volatility index is equal to smoke point plus______________________?
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A. 10 mm approximately

B. 0.42 (% distilled at 204C)

C. 5 mm

D. 0.84 (% distilled at 204C)

243. Which of the following has the highest gum forming tendency in gosoline ?
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A. Aromatics

B. Diolefins

C. Paraffins

D. Naphthenes

244. Pick out the correct statement pertaining to catalytic cracking ?
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A. With increase in the reactor pressure, octane number of gasoline decreases

B. All A., B. and C.

C. Percentage conversion increases with increase in the catalyst to oil ratio

D. With increase in the reactor temperature, gasoline yield decreases for a given conversion

245. Choose the correct statement?
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A. Coking tendency increases with increasing molecular weight

B. Coking tendency decreases with increasing molecular weight

C. Coking is an exothermic reaction

D. Higher pressure enhances coke formation

246. Which of the following is a type of sedimentary rock?
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A. All of the above

B. Organic rock

C. Clastic rock

D. Chemical rock

247. Which of the following is used as a solvent in deasphalting of petroleum products ?
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A. Methyl ethyl ketone

B. Furfural

C. Propane

D. Liquid sulphur dioxide

248. Crude oil is pumped by a _______________ pump?
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A. Gear

B. Centrifugal

C. Reciprocating

D. Screw

249. ______________ test is done to find out the softening point of bitumen?
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A. Flame

B. Viscosity

C. Impact

D. Ball and ring

250. Pick out the correct statement?
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A. Paraffins have lower smoke point than aromatics

B. Suitability of kerosene as a fuel & as an illuminant may be determined by char value test

C. Paraffins have higher octane number than corresponding iso-paraffin

D. Aviation fuel should have very high cloud point

251. The catalytic cracking of heavier petroleum fraction is done to produce mainly____________________?
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A. Tar

B. Asphalt

C. Diesel oil

D. Gasoline

252. Waxy crudes are treated with chemical additives mainly to_________________________?
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A. Remove wax

B. Dissolve wax

C. Depress its pour point

D. Precipitate wax

253. Name the endothermic reaction out of the following ?
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A. Catalytic polymerisation

B. Hydrocracking

C. Catalytic cracking

D. Dehydrogeneration of Naphthene to produce aromatic

254. Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency ?
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A. Iso-paraffins

B. Aromatics

C. Naphthenes

D. Paraffins

255. Pick out the wrong statement ?
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A. Hydrocarbons of low specific gravity (e.g., paraffins) possess the maximum thermal energy per unit volume

B. Aromatics have lower specific gravity than corresponding paraffins

C. Higher specific gravity of petroleum products means higher C/H ratio

D. Hydrocarbons of high specific gravity (e.g., aromatics) possess the maximum thermal energy per unit weight

256. The characterisation factor of a crude oil is calculated as 12.5. It means that; it is________________?
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A. Intermediate

B. Naphthenic

C. Paraffinic

D. None of these

257. Pick out the wrong statement ?
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A. Iso-paraffin crack faster than n-paraffin.

B. Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic

C. None of these

D. Rate of decomposition of olefins in catalytic cracking is slightly slower than the thermal cracking

258. Diesel index is defined as_________________?
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A. (API) (Aniline Point, F)/100

B. (API) (100)/Aniline Point, C

C. (API) (Aniline Point, C)/100

D. (API) (100)/Aniline Point, F

259. Pick out the wrong statement ?
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A. Fluorescence of oils helps to detect its adulteration

B. Color of petroleum products indicates the degree of refinement

C. Lighter petroleum distillates are lighter in color than the heavier residual oils

D. A pale color of petroleum product indicates lower viscosity

260. Removal of light fractions from crude oil is called its _____________________?
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A. Visbreaking

B. Sweetening

C. Stabilisation

D. Dehydration

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