MCQOPTIONS
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MCQOPTIONS
This section includes 246 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The coking process normally mostly used in Indian oil refineries is the ____________________ coking process ? |
| A. | Delayed |
| B. | Flexi |
| C. | Fluid |
| D. | Contact |
| Answer» B. Flexi | |
| 52. |
The characterisation factor of a crude oil is calculated as 12.5. It means that; it is________________? |
| A. | Paraffinic |
| B. | Naphthenic |
| C. | Intermediate |
| D. | None of these |
| Answer» B. Naphthenic | |
| 53. |
The characterisation factor of crude petroleum oil is around__________________? |
| A. | 3 |
| B. | 11 |
| C. | 22 |
| D. | 28 |
| Answer» C. 22 | |
| 54. |
The catalytic cracking of heavier petroleum fraction is done to produce mainly____________________? |
| A. | Gasoline |
| B. | Asphalt |
| C. | Diesel oil |
| D. | Tar |
| Answer» D. Tar | |
| 55. |
The best method of determining sulphur in crude oil is by the _______________ method? |
| A. | Kjeldahl |
| B. | Dumas |
| C. | Bomb calorimeter |
| D. | Junkers calorimeter |
| Answer» D. Junkers calorimeter | |
| 56. |
The average boiling point of aviation turbine fuel is closest to that of__________________? |
| A. | Lubricating oils |
| B. | LPG |
| C. | Diesel |
| D. | Kerosene |
| Answer» E. | |
| 57. |
The amount of tetraethyl lead added to improve the octane number of motor gasoline is around ______________ c.c per gallon of petrol? |
| A. | 3 |
| B. | 300 |
| C. | 3000 |
| D. | 1000 |
| Answer» B. 300 | |
| 58. |
Salt content (measured as sodium chloride) in electrically desalted crude oil comes down to a level of about __________________ ptb (pounds per thousand barrel) ? |
| A. | 0.03 |
| B. | 3 |
| C. | 35 |
| D. | 70 |
| Answer» C. 35 | |
| 59. |
Road grade bitumen is produced from vacuum residue by its ____________________? |
| A. | Aeration |
| B. | Pyrolysis |
| C. | Hydrogenation |
| D. | Steam reforming |
| Answer» E. | |
| 60. |
Research octane number refers to the___________________? |
| A. | Low octane number motor fuels |
| B. | High octane number motor fuels |
| C. | High octane number aviation fuels |
| D. | Unleaded motor fuels |
| Answer» E. | |
| 61. |
Removal of light fractions from crude oil is called its _____________________? |
| A. | Sweetening |
| B. | Dehydration |
| C. | Stabilisation |
| D. | Visbreaking |
| Answer» D. Visbreaking | |
| 62. |
Reid vapour pressure of gasoline is the measure of its_________________? |
| A. | Pour point |
| B. | Cloud point |
| C. | Vapour locking tendency |
| D. | Carbon residue |
| Answer» D. Carbon residue | |
| 63. |
Refractive index of a petrofuel which is the ratio of velocity of light in air to its velocity in the petrofuel gives an indication if its_________________? |
| A. | Molecular weight |
| B. | Aromatics content |
| C. | Both A. & B. |
| D. | Neither ‘a’ nor ‘b’ |
| Answer» D. Neither ‘a’ nor ‘b’ | |
| 64. |
Reforming__________________? |
| A. | Uses naphtha as feedstock |
| B. | Does not much affect the molecular weight of the feed |
| C. | Improves the quality & yield of gasoline |
| D. | All A., B. and C. |
| Answer» E. | |
| 65. |
Reforming converts_________________? |
| A. | Olefins into paraffins |
| B. | Naphthenes into aromatics |
| C. | Naphthenes into olefins |
| D. | Naphthenes into paraffin |
| Answer» C. Naphthenes into olefins | |
| 66. |
Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatization by liquid SO2 extraction (Edeleanu process), its smoke point may become _______________________ mm? |
| A. | 5 |
| B. | 10 |
| C. | 25 |
| D. | 100 |
| Answer» D. 100 | |
| 67. |
Quinoline is a/an ________________ compound ? |
| A. | Sulphur |
| B. | Nitrogen |
| C. | Oxygen |
| D. | None of these |
| Answer» C. Oxygen | |
| 68. |
Pyrolysis of kerosene or natural gasoline is done to produce mainly the___________________? |
| A. | Olefins and aromatics |
| B. | Lighter paraffins |
| C. | Stabilised gasoline |
| D. | Diesel |
| Answer» B. Lighter paraffins | |
| 69. |
Products drawn from the top to bottom of the crude oil distillation column has progressively increasing ___________________? |
| A. | Boiling points |
| B. | Molecular weight |
| C. | C/H ratio |
| D. | All A., B. and C. |
| Answer» E. | |
| 70. |
Pressure & temperature maintained in catalytic cracking is about__________________? |
| A. | 2 atm & 500°C |
| B. | 10 atm & 500°C |
| C. | 30 atm & 200°C |
| D. | 50 atm & 750°C |
| Answer» B. 10 atm & 500°C | |
| 71. |
Pressure maintained in the high pressure primary tower of a three stage crude oil distillation system is about ______________ kg/cm2? |
| A. | 1.5 |
| B. | 3 |
| C. | 6 |
| D. | 12 |
| Answer» C. 6 | |
| 72. |
Presence of sulphur in gasoline___________________? |
| A. | Leads to corrosion |
| B. | Increases lead susceptibility |
| C. | Decreases gum formation |
| D. | Helps during stabilisation |
| Answer» B. Increases lead susceptibility | |
| 73. |
Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has__________________? |
| A. | High pour point and low smoke point |
| B. | Low viscosity index |
| C. | High self-ignition temperature |
| D. | All A., B. and C. |
| Answer» C. High self-ignition temperature | |
| 74. |
Presence of aromatics in __________________? |
| A. | Diesel increases its cetane number |
| B. | Kerosene increases its smoke point |
| C. | Petrol increases its octane number |
| D. | All A., B. and C. |
| Answer» D. All A., B. and C. | |
| 75. |
Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about _______________ °C ? |
| A. | 50 |
| B. | 70 |
| C. | 90 |
| D. | 140 |
| Answer» D. 140 | |
| 76. |
Pour point of a petrofuel is________________? |
| A. | Multiple of 3°F |
| B. | Multiple of 5°F |
| C. | 5°C below the temperature at which oil ceases to flow |
| D. | None of these |
| Answer» D. None of these | |
| 77. |
Pour point and freezing point is equal for__________________? |
| A. | Petrol |
| B. | Diesel |
| C. | Water |
| D. | Crude petroleum |
| Answer» D. Crude petroleum | |
| 78. |
Polymerisation__________________? |
| A. | Produces i-octane from cracked gases containing i-butane and butene |
| B. | Causes olefins to combine with each other |
| C. | Causes aromatics to combine with each other |
| D. | Is aimed at producing lubricating oil |
| Answer» C. Causes aromatics to combine with each other | |
| 79. |
Platforming is a ____________ process? |
| A. | Moving bed |
| B. | Fluidised bed |
| C. | Non-regenerative & fixed bed |
| D. | Regenerative |
| Answer» D. Regenerative | |
| 80. |
Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene ? |
| A. | Smoking tendency of hydrocarbons increases in the order: paraffins → isoparaffins → naphthenes → aromatics |
| B. | Smoking tendency of paraffins increases with decrease in its molecular weight |
| C. | Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond |
| D. | Smoking tendency of aromatics decreases with increase in its molecular weight |
| Answer» C. Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond | |
| 81. |
Pick out the undesirable property for a solvent meant for dewaxing of lube oil ? |
| A. | Complete miscibility with oil |
| B. | High solubility of wax in the solvent |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 82. |
Pick out the correct statement pertaining to catalytic cracking ? |
| A. | With increase in the reactor pressure, octane number of gasoline decreases |
| B. | With increase in the reactor temperature, gasoline yield decreases for a given conversion |
| C. | Percentage conversion increases with increase in the catalyst to oil ratio |
| D. | All A., B. and C. |
| Answer» E. | |
| 83. |
Pick out the correct statement about catalytic polymerisation ? |
| A. | H2SO4 polymerisation process gives gasoline rich in unsaturates |
| B. | In H2SO4 polymerisation, H3PO4 is always used with 2% steam to prevent meta & ortho H3PO4 formation, which are inactive |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» C. Both A. and B. | |
| 84. |
Pick out the additive property of lube oil out of following ? |
| A. | °API gravity |
| B. | Specific gravity |
| C. | Viscosity |
| D. | Flashpoint |
| Answer» B. Specific gravity | |
| 85. |
Phenols are added in gasoline to____________________? |
| A. | Improve the octane number |
| B. | Act as an antioxidant |
| C. | Reduce its viscosity |
| D. | Increase its pour point |
| Answer» C. Reduce its viscosity | |
| 86. |
Petroleum ________________ ? |
| A. | Is optically active |
| B. | Constitutes mainly of olefins |
| C. | Does not contain asphalt |
| D. | Does not contain aromatics |
| Answer» B. Constitutes mainly of olefins | |
| 87. |
Petroleum coke is used mainly in the __________________ ? |
| A. | Discoloration of yellow glycerine |
| B. | Sugar refining |
| C. | Manufacture of carbon electrode |
| D. | Blast furnace for reduction of iron ore |
| Answer» D. Blast furnace for reduction of iron ore | |
| 88. |
Petroleum is believed to have originated from _______________ sources? |
| A. | Vegetable |
| B. | Animal |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 89. |
Petrolatum is__________________? |
| A. | Same as petroleum ether |
| B. | Petroleum coke |
| C. | A mixture of microcrystalline wax in viscous hydrocarbon liquids |
| D. | None of these |
| Answer» D. None of these | |
| 90. |
Performance number of a liquid fuel is related to its __________________? |
| A. | Wax content |
| B. | Spontaneous ignition temperature |
| C. | Knocking tendency |
| D. | Sulphur content |
| Answer» C. Knocking tendency | |
| 91. |
Percentage of straight run gasoline in a typical crude oil may be around________________? |
| A. | 6 |
| B. | 18 |
| C. | 38 |
| D. | 52 |
| Answer» E. | |
| 92. |
Penetration test determines the _____________ of the grease? |
| A. | Stiffness |
| B. | Lubricating properties (e.g. oilness) |
| C. | Service temperature |
| D. | Variation in viscosity with temperature |
| Answer» B. Lubricating properties (e.g. oilness) | |
| 93. |
Paraffins are desirable in lubricating oil, as it has got high_____________________? |
| A. | Viscosity |
| B. | Viscosity index |
| C. | Smoke point |
| D. | Pour point |
| Answer» D. Pour point | |
| 94. |
Paraffin base crude oil as compared to asphalt base crude gives___________________? |
| A. | Higher yield of straight run gasoline |
| B. | Higher octane number gasoline |
| C. | Lower viscosity index lube oil |
| D. | Poorer yield of lube oil |
| Answer» B. Higher octane number gasoline | |
| 95. |
Operating temperature and pressure in catalytic reforming is about_____________? |
| A. | 1-5 Kgf/cm2 & 200°C |
| B. | 15-45 Kgf/cm2 & 450-550°C |
| C. | 50 – 75 kgf/cm2 & 600 – 800°C |
| D. | 5-10 kgf/cm2 & 150 – 250°C |
| Answer» C. 50 – 75 kgf/cm2 & 600 – 800°C | |
| 96. |
Operating condition in the electrical dehydrators for crude oil is about____________________? |
| A. | 6.5 kgf/Cm2 & 95°C |
| B. | 1 atm. & 110 °C |
| C. | 20 kgf/cm2 & 110°C |
| D. | 50 atm. and 150°C |
| Answer» B. 1 atm. & 110 °C | |
| 97. |
Olefins are_________________? |
| A. | Saturated hydrocarbons |
| B. | Unsaturated cyclic compounds (hydrocarbons) |
| C. | Present in substantially good quantity in crude petroleum |
| D. | None of these |
| Answer» E. | |
| 98. |
Older crude petroleum __________________? |
| A. | Is light and better |
| B. | Gives more distillates |
| C. | Gives less tar |
| D. | All A., B. and C. |
| Answer» C. Gives less tar | |
| 99. |
Octane number (unleaded) of gasoline produced by isomerisation of butane may be about __________________? |
| A. | 45 |
| B. | 55 |
| C. | 70 |
| D. | 90 |
| Answer» D. 90 | |
| 100. |
Octane numbers of motor gasoline used in India and America are respectively________________? |
| A. | 87 & 94 |
| B. | 94 & 87 |
| C. | 94 & 100 |
| D. | 83 & 100 |
| Answer» B. 94 & 87 | |