chemical engineering petroleum refinery engineering Mcqs
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

61. Which of the following is the most important property for a jet fuel ?
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A. Freezing point

B. Colour

C. Cloud point

D. Pour point

62. Which of the following has the lowest flash point of all ?
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A. Kerosene

B. Diesel

C. Furnace oil

D. Petrol
63. 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

64. Quinoline is a/an ________________ compound ?
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A. None of these

B. Nitrogen

C. Sulphur

D. Oxygen

65. Extractor temperature is maintained at -20C in Edeleanu process to reduce the _________________ of kerosene?
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A. Paraffins

B. Smoke point

C. Aromatics

D. Naphthenes

66. High aniline point of diesel indicates that, it _____________________?
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A. Has a large ignition delay

B. Is highly paraffinic

C. Has a low diesel index

D. Is highly aromatic

67. Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of ____________________?
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A. Discoloration

B. Coking

C. Thermal cracking

D. Gum formation

68. Crude oils containing more than ____________ kg of total salts (expressed in terms of NaCl) per thousand barrel is called a salty crude ?
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A. 1

B. 25

C. 15

D. 5
69. Char value of Kerosene is the amount of charred oil deposition on the wick obtained after burning it in a standard wick lamp at a standard rate for 24 hours. Char value of a good quality kerosene should be less than ________________ mg/kg of kerosene?
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A. 100

B. 1

C. 500

D. 20
70. Thermofor catalytic cracking process is a ______________ process?
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A. Non-catalytic

B. Fluidised bed

C. Fixed bed

D. Moving bed

71. Which of the following is an additive used for improving the cetane number of diesel ?
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A. None of these

B. Tetraethyl lead

C. Tetramethyllead

D. Ethyl nitrate or acetone

72. Breathing loss on storage of gasoline occurs due to the _____________________?
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A. Presence of unsaturated air

B. Fluctuation of ambient temperature during day and night

C. Both A. and B.

D. Neither A. nor B.

73. Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about ________________ mm Hg absolute?
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A. 1 to 5

B. 450 to 500

C. 30 to 80

D. 250 to 350

74. ____________ is not an important refinery process for upgrading the quality of lubricating oil ?
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A. Deoiling

B. Clay treatment

C. Hydro-treatment

D. Solvent refining

75. Aniline point is the _________________?
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A. Characteristic property of diesel & lubricating oils

B. Measure of aromatic content of oil

C. Both A. and B.

D. Neither A. nor B.

76. Sulphur content in lighter and heavier petroleum products is generally determined respectively by _______________?
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A. Quartz tube method and lamp method

B. Bomb method and quartz tube method

C. Bomb method and lamp method

D. Lamp method and bomb method

77. 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. 50

B. 5

C. 100

D. 25
78. The amount of tetraethyl lead added to improve the octane number of motor gasoline is around ______________ c.c per gallon of petrol?
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A. 3

B. 300

C. 1000

D. 3000

79. Both asphalt and wax are produced by ______________ base crude oils?
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A. Mixed

B. Asphalt

C. Naphthenic

D. Paraffin

80. Testing of the knocking characteristics of petrofuels is done in a _________________ engine ?
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A. Stirling

B. Diesel

C. Carnot

D. CFR (Co-operative fuel research)
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