chemical engineering MCQs – Page 169

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
3361. _____________ base crude oil is also called asphaltic crude?
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A. Mixed

B. Naphthenic

C. Paraffinic

D. Aromatic

3362. Waxes present in petroleum products_________________?
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A. Crystallise out at low temperature

B. Decrease their viscosity

C. Are not soluble in them

D. Can be separated out by distillation

3363. Deoiling is the process of removal of oil from wax. It is done by the _______________ process?
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A. All A., B. & C.

B. Resettling

C. Solvent extraction

D. Sweating

3364. Straight run petrol as compared to methyl/ethyl alcohol has_________________?
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A. Lower calorific value

B. Higher ignition temperature

C. Higher specific gravity

D. Lower octane number
3365. The coking process normally mostly used in Indian oil refineries is the ____________________ coking process ?
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A. Fluid

B. Delayed

C. Flexi

D. Contact

3366. Older crude petroleum __________________?
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A. Gives more distillates

B. Gives less tar

C. Is light and better

D. All A., B. and C.

3367. Cetane number of high speed diesel must be ?_________________?
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A. 75

B. 45

C. 30

D. 95

3368. Catalyst used in catalytic reforming is__________________?
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A. Platinum on alumina

B. Nickel

C. Iron

D. Aluminium chloride

3369. Pyrolysis of kerosene or natural gasoline is done to produce mainly the___________________?
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A. Stabilised gasoline

B. Olefins and aromatics

C. Lighter paraffins

D. Diesel

3370. Gasoline yield in catalytic reforming of naphtha may be about _________________ percent by weight?
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A. 65

B. 50

C. 98

D. 85
3371. True boiling point apparatus is used for the__________________?
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A. Evaluation of oil stocks

B. None of these

C. Determination of true vapour pressure

D. Determination of characterisation factor

3372. Petroleum is believed to have originated from _______________ sources?
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A. Vegetable

B. Animal

C. Both A. and B.

D. Neither A. nor B.

3373. Thermofor catalytic cracking process is a ______________ process?
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A. Fixed bed

B. Moving bed

C. Fluidised bed

D. Non-catalytic
3374. 95% (by volume) of LPG at 760 mm Hg pressure will evaporate at __________ C?
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A. 2

B. 55

C. 30

D. -40

3375. Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has__________________?
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A. High self-ignition temperature

B. High pour point and low smoke point

C. Low viscosity index

D. All A., B. and C.

3376. Aniline point test of an oil qualitatively indicates the ______________ content of an oil?
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A. Paraffin

B. Olefin

C. Naphthene

D. Aromatic
3377. Reforming__________________?
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A. Uses naphtha as feedstock

B. All A., B. and C.

C. Does not much affect the molecular weight of the feed

D. Improves the quality & yield of gasoline

3378. Petrolatum is__________________?
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A. None of these

B. Petroleum coke

C. A mixture of microcrystalline wax in viscous hydrocarbon liquids

D. Same as petroleum ether

3379. The main aim of cracking is to produce ____________________?
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A. Gasoline

B. Coke

C. Lube oil

D. Petrolatum

3380. Stage efficiency for packed tower varies with the____________________?
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A. Operating pressure and column diameter

B. All A., B. and C.

C. Fluid rates and fluid properties

D. Type & size of packing