chemical engineering MCQs – Page 168

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 Review each marked answer and report any item that may be outdated or unclear.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
3341. The general formula of naphthenes is___________________?
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A. CnH2n-6 (where, n ? 6)

B. CnHn-4

C. Same as that for olefins i.e. CnH2n

D. CnH2n + 2

3342. Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil__________________?
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A. Gives higher yield of petrol

B. Lower octane number of petrol

C. Higher sulphur content in the product

D. Higher gum forming material in petrol

3343. Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely miscible. It means that the aniline point of the diesel is _______________ the room temperature?
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A. Less than

B. Same as

C. More than

D. Either more or less; depends on the room temperature

3344. Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with __________________?
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A. Methyl alcohol

B. Methane

C. Ethyl alcohol

D. Ethane

3345. The pressure (kg/cm2) and temperature (C) maintained in electrical desalters for crude oil are respectively__________________?
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A. 10 and 300

B. 50 and 250

C. 1 and 200

D. 10 and 120

3346. Crude petroleum oil is a _______________ fuel?
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A. Primary

B. Fossil

C. Both A. & B.

D. Secondary

3347. Maximum use of petroleum coke is in__________________?
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A. Adsorption refining operation

B. Carbon electrode manufacture

C. Iron ore reduction

D. Fuel gas manufacture

3348. The order of preference for feedstock to a catalytic reformer is _________________ ?
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A. Virgin naphtha coking naphtha catalytic naphtha

B. Virgin naphtha catalytic naphtha coking naphtha

C. Coking naphtha virgin naphtha catalytic naphtha

D. Catalytic naphtha coking naphtha virgin naphtha

3349. Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is _______________ centistokes (or 100 Redwood I seconds) ?
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A. 100

B. 5

C. 25

D. 50

3350. Octane number of gasoline is a measure of its__________________?
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A. Ignition delay

B. Smoke point

C. Ignition temperature

D. Resistance to knock
3351. Liquefied petroleum Gas (LPG) used for the household cooking comprises mainly of _______________?
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A. Butane & ethane

B. Methane & carbon monoxide

C. Methane & ethane

D. Propane & butane
3352. Which of the following constituents present in petroleum is responsible for ash formation ?
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A. Oxygen compounds

B. Nitrogen compounds

C. Organometallic compounds

D. Sulphur compounds
3353. Flash point of atmospheric distillation residue is determined by ______________ apparatus?
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A. None of these

B. Pensky-Martens (closed cup type)

C. Abel

D. Cleveland (open cup type)
3354. Which of the following has the maximum API gravity of all ?
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A. Kerosene

B. Diesel

C. Furnace oil

D. Petrol
3355. The reservoir rock containing petroleum has_________________?
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A. Low porosity

B. High permeability

C. High porosity

D. Both B. and C.
3356. Octane number of gasoline produced by two stage fluidised catalytic cracking process is___________________?
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A. 92

B. 80

C. 97

D. 87

3357. Main constituent of natural gas is___________________?
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A. C2H2

B. C2H4

C. CH4

D. C2H6

3358. Which of the following has the highest gum forming tendency in gosoline ?
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A. Naphthenes

B. Aromatics

C. Diolefins

D. Paraffins

3359. Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than ______________ of the head?
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A. 6% of I.D.

B. Either A. or B., whichever is smaller

C. 3 times the thickness

D. Either A. or B., whichever is larger
3360. Operating condition in the electrical dehydrators for crude oil is about____________________?
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A. 6.5 kgf/Cm2 & 95C

B. 1 atm. & 110 C

C. 50 atm. and 150C

D. 20 kgf/cm2 & 110C