chemical engineering petroleum refinery engineering MCQs – Page 5

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 Review each marked answer and report any item that may be outdated or unclear.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
81. Deoiling of wax is done by its _________________?
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A. Heating

B. Cooling

C. Solvent extraction

D. Both B. & C.
82. Flash point of an oil gives an idea of the___________________?
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A. Nature of boiling point diagram of the system

B. Amount of low boiling fraction present

C. Explosion hazards

D. All A., B. and C.

83. Gasoline yield in catalytic reforming of naphtha may be about _________________ percent by weight?
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A. 98

B. 65

C. 85

D. 50

84. Which one of the following processes aims at producing higher yield of gaseous unsaturated hydrocarbons and aromatics like benzene & toluene ?
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A. Reforming

B. Hydrocracking

C. Pyrolysis

D. Alkylation

85. With increase in density, the viscosity of petroleum products _____________________?
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A. Decreases

B. Either A. or B.

C. Remain same

D. Increases
86. Pour point of a petrofuel is________________?
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A. None of these

B. Multiple of 5F

C. Multiple of 3F

D. 5C below the temperature at which oil ceases to flow
87. Complete removal of _____________ from gasoline is done by Unisol process using caustic soda and methyl alcohol?
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A. Waxes

B. Diolefins

C. Mercaptans

D. Asphalt

88. Furfural solvent extraction is used for upgrading (by dissolving aromatics) ?
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A. Cracking feedstock

B. Lubricating oils

C. Wax

D. Naphtha

89. Road grade bitumen is produced from vacuum residue by its ____________________?
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A. Pyrolysis

B. Aeration

C. Steam reforming

D. Hydrogenation

90. A typical yield of diesel in straight run distillation of crude oil may be about ________________ percent?
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A. 18

B. 8

C. 35

D. 28

91. True vapour pressure of a petroleum fraction ________________ Reid vapour pressure?
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A. Is more than

B. Is same as

C. May be either more or less than

D. Is less than

92. The main aim of cracking is to produce ____________________?
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A. Lube oil

B. Petrolatum

C. Coke

D. Gasoline
93. Which of the following is not a sulphur compound present in petroleum ?
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A. Thiophenes

B. Sulphones

C. Mercaptans

D. Pyrroles
94. Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about _______________ mm Hg (absolute)?
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A. 10-May

B. 30-80

C. 150-250

D. 350-400

95. Pyrolysis of kerosene or natural gasoline is done to produce mainly the___________________?
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A. Olefins and aromatics

B. Stabilised gasoline

C. Diesel

D. Lighter paraffins

96. Glycol added to petrol acts as a/an ________________ agent ?
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A. Anti-gum forming

B. Anti-knocking

C. Dewaxing

D. Anti-icing
97. Which is an anticing compound ?
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A. Mercaptans

B. Pyridine

C. Amyl nitrate

D. Alcohols
98. Aniline point is the temperature at which___________________?
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A. Equal weight of aniline & the test sample are completely miscible

B. Equal weight of diesel & the aniline are completely miscible

C. Aniline vaporises

D. Equal volume of aniline & the test sample are completely miscible
99. Which of the following is desirable in petrol (gasoline) but undesirable in kerosene ?
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A. Naphthenic acid

B. Paraffins

C. Aromatics

D. Mercaptans
100. Polymerisation__________________?
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A. Causes aromatics to combine with each other

B. Is aimed at producing lubricating oil

C. Produces i-octane from cracked gases containing i-butane and butene

D. Causes olefins to combine with each other