chemical engineering petroleum refinery engineering MCQs – Page 3

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 Review each marked answer and report any item that may be outdated or unclear.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
41. Presence of aromatics in __________________?
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A. Diesel increases its cetane number

B. Kerosene increases its smoke point

C. All A., B. and C.

D. Petrol increases its octane number
42. In Hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen_________________?
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A. Enhances the desulphurisation process

B. Minimises coke formation

C. Both A. and B.

D. Neither A. nor B.

43. During electrical desalting of crude oil, the electrical conductivity of a mixture of crude oil and water (which ranges between 3 to 8% water) ________________ with increase in the amount of water?
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A. Decreases linearly

B. Increases

C. Remains unchanged

D. Decreases

44. _____________ chloride present in crude petroleum as impurity is the most prolific producer of HCl during distillation?
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A. Magnesium

B. Potassium

C. Calcium

D. Sodium

45. Octane number of gasoline is a measure of its__________________?
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A. Smoke point

B. Ignition delay

C. Ignition temperature

D. Resistance to knock
46. Petrolatum is__________________?
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A. Same as petroleum ether

B. Petroleum coke

C. None of these

D. A mixture of microcrystalline wax in viscous hydrocarbon liquids
47. Which of the following fractions of petroleum contains maximum sulphur ?
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A. Atmospheric residue

B. Gasoline

C. Naphtha

D. Diesel

48. Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 is maintained during cracking mainly to__________________?
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A. Suppress coke formation

B. Reduce gum content in gasoline

C. Enhance the octane number of gasoline

D. Increase the yield of light distillates

49. Which of the following is a Naphthene ?
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A. Butene

B. Cyclohexane

C. Acetylene

D. Butadiene

50. The octane number of aviation gasoline may be __________________?
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A. 97

B. > 100

C. 87

D. 79

51. Which of the following constituents present in petroleum is responsible for ash formation ?
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A. Nitrogen compounds

B. Organometallic compounds

C. Oxygen compounds

D. Sulphur compounds
52. A multigrade lubricating oil means an oil having high __________________?
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A. Viscosity index

B. Viscosity

C. Aniline point

D. Flash point

53. The main reaction in reforming is the _____________________?
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A. Hydrogenation of naphthenes

B. Dehydrogenation of naphthenes

C. Hydrocracking of paraffins

D. Saturation of olefins

54. Which of the following processes is used for the production of petroleum coke ?
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A. Reforming

B. Visbreaking

C. Stabilisation

D. Cracking
55. Butadiene is a/an_________________?
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A. Olefin

B. Aromatic

C. Naphthene

D. Di-olefin
56. Catalyst used in the catalytic polymerisation is__________________?
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A. Aluminium chloride

B. Vanadium pentoxide

C. Nickel

D. Phosphoric acid on kieselguhr
57. Which of the following factors does not govern the mechanism of petroleum formation from organic sources ?
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A. pH of the soil

B. Heat

C. Pressure

D. Bacterial action

58. Natural gas recovered along with crude oil from oil wells is called wet natural gas which has a higher ______________ compared to the dry natural gas?
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A. Unsaturated hydrocarbon content

B. Quantity of propane

C. Quantity of butane

D. Calorific value
59. Which of the following theories of origin of petroleum does not explain the presence of nitrogen & sulphur compounds in crude oil ?
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A. Carbide theory

B. All A., B. and C.

C. Modern theory

D. Engler theory

60. Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octane is chemically known as ___________________?
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A. 1, 3 butadiene

B. 2-2-4 tri methyl pentane

C. Tetra methyl ethylene

D. ?-methyl naphthalene