MCQOPTIONS
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MCQOPTIONS
This section includes 401 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. |
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 | |
| 52. |
95% (by volume) of LPG at 760 mm Hg pressure will evaporate at __________ °C. |
| A. | 2 |
| B. | -40 |
| C. | 30 |
| D. | 55 |
| Answer» B. -40 | |
| 53. |
Which is the most undesirable component in kerosene? |
| A. | Aromatics |
| B. | I-paraffins |
| C. | N-paraffins |
| D. | Naphthenes |
| Answer» B. I-paraffins | |
| 54. |
Which of the following contains maximum sulphur? |
| A. | Diesel |
| B. | Petrol |
| C. | Kerosene |
| D. | Fuel oil |
| Answer» E. | |
| 55. |
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 |
| A. | Increase the yield of light distillates |
| B. | Suppress coke formation |
| C. | Enhance the octane number of gasoline |
| D. | Reduce gum content in gasoline |
| Answer» C. Enhance the octane number of gasoline | |
| 56. |
Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API) ? |
| A. | Diesel |
| B. | Gasoline |
| C. | Atmospheric gas oil |
| D. | Vacuum gas oil |
| Answer» D. Vacuum gas oil | |
| 57. |
Which is an anticing compound? |
| A. | Amyl nitrate |
| B. | Alcohals |
| C. | Mercaptans |
| D. | Pyridine |
| Answer» C. Mercaptans | |
| 58. |
Which parameter is used for the grading of paraffin waxes? |
| A. | Specific gravity |
| B. | Melting point |
| C. | Viscosity |
| D. | Penetration number |
| Answer» D. Penetration number | |
| 59. |
Which of the following has the lowest cetane number? |
| A. | Aromatics |
| B. | I-paraffins |
| C. | Naphthene |
| D. | Olefins |
| Answer» B. I-paraffins | |
| 60. |
Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency? |
| A. | Paraffins |
| B. | Naphthenes |
| C. | Aromatics |
| D. | Iso-paraffins |
| Answer» B. Naphthenes | |
| 61. |
Which of the following is a non-regenerative fixed bed catalytic reforming process? |
| A. | Hydroforming |
| B. | Thermofer catalytic reforming |
| C. | Platforming |
| D. | Hyperforming |
| Answer» D. Hyperforming | |
| 62. |
Which of the following has maximum hydrogen/carbon ratio (by weight)? |
| A. | Naphtha |
| B. | Gasoline |
| C. | Diesel |
| D. | Fuel oil |
| Answer» C. Diesel | |
| 63. |
Which of the following has the highest gum forming tendency in gosoline? |
| A. | Paraffins |
| B. | Diolefins |
| C. | Aromatics |
| D. | Naphthenes |
| Answer» C. Aromatics | |
| 64. |
The pressure (kg/cm² ) and temperature (°C) maintained in electrical desalters for crude oil are respectively |
| A. | 10 and 120 |
| B. | 1 and 200 |
| C. | 50 and 250 |
| D. | 10 and 300 |
| Answer» C. 50 and 250 | |
| 65. |
Which of the following fractions of petroleum contains maximum sulphur? |
| A. | Diesel |
| B. | Gasoline |
| C. | Naphtha |
| D. | Atmospheric residue |
| Answer» E. | |
| 66. |
Which of the following is not an important property of fuel oil/furnace oil? |
| A. | Sulphur content |
| B. | Viscosity |
| C. | Aniline point |
| D. | Flash point |
| Answer» D. Flash point | |
| 67. |
Aniline point of high speed diesel may be about __________ °C. |
| A. | 35 |
| B. | 70 |
| C. | 105 |
| D. | 150 |
| Answer» C. 105 | |
| 68. |
Which of the following has the minimum °API gravity of all? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» E. | |
| 69. |
Flash point of motor gasoline may be around __________ °C. |
| A. | 10 |
| B. | 45 |
| C. | 100 |
| D. | 150 |
| Answer» C. 100 | |
| 70. |
Which of the following has the maximum °API gravity of all? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» D. Furnace oil | |
| 71. |
Which of the following is desirable in petrol (gasoline) but undesirable in kerosene? |
| A. | Paraffins |
| B. | Aromatics |
| C. | Mercaptans |
| D. | Naphthenic acid |
| Answer» C. Mercaptans | |
| 72. |
Which of the following has the highest flash point of all? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» E. | |
| 73. |
Flash point of diesel/kerosene (>50°C) is determined by the |
| A. | Abel apparatus |
| B. | Pensky-Martens apparatus |
| C. | Saybolt chromometer |
| D. | None of these |
| Answer» B. Pensky-Martens apparatus | |
| 74. |
Which of the following is used as a catalyst in fluidised bed catalytic cracking? |
| A. | Silica-magnesia |
| B. | Silica-alumina |
| C. | Bentonite clays |
| D. | All of the above |
| Answer» E. | |
| 75. |
Which one is used to determine the colour of petroleum products? |
| A. | Colour comparator |
| B. | Saybolt chromometer |
| C. | Cleveland apparatus |
| D. | None of these |
| Answer» B. Saybolt chromometer | |
| 76. |
Extractor temperature is maintained at -20°C in Edeleanu process to reduce the __________ of kerosene. |
| A. | Smoke point |
| B. | Paraffins |
| C. | Aromatics |
| D. | Naphthenes |
| Answer» C. Aromatics | |
| 77. |
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 | |
| 78. |
Which of the following has the highest octane number? |
| A. | Aromatics |
| B. | I-paraffins |
| C. | Naphthenes |
| D. | Olefins |
| Answer» B. I-paraffins | |
| 79. |
Which of the following is used as a solvent in deasphalting of petroleum products? |
| A. | Furfural |
| B. | Propane |
| C. | Methyl ethyl ketone |
| D. | Liquid sulphur dioxide |
| Answer» C. Methyl ethyl ketone | |
| 80. |
Which of the following has the highest viscosity of all (at a given temperature)? |
| A. | Naphtha |
| B. | Fuel oil |
| C. | Light diesel oil |
| D. | Petrol |
| Answer» C. Light diesel oil | |
| 81. |
Both asphalt and wax are produced by __________ base crude oils. |
| A. | naphthenic |
| B. | asphalt |
| C. | paraffin |
| D. | mixed |
| Answer» E. | |
| 82. |
Cracking is |
| A. | an exothermic reaction. |
| B. | an endothermic reaction. |
| C. | favoured at very low temperature. |
| D. | none of these. |
| Answer» C. favoured at very low temperature. | |
| 83. |
1 centistoke is equal to __________ Redwood I seconds. |
| A. | 1 |
| B. | 4.08 |
| C. | 0.408 |
| D. | 40.8 |
| Answer» C. 0.408 | |
| 84. |
Which of the following petroleum products contain minimum sulphur ? |
| A. | Naphtha |
| B. | Kerosene |
| C. | LSHS |
| D. | Furnace oil |
| Answer» B. Kerosene | |
| 85. |
Gasoline yield in catalytic reforming of naphtha may be about __________ percent by weight. |
| A. | 85 |
| B. | 65 |
| C. | 50 |
| D. | 98 |
| Answer» B. 65 | |
| 86. |
A petroleum well is called 'dry', if it contains |
| A. | very little oil. |
| B. | no natural gas. |
| C. | only natural gas. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 87. |
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. | |
| 88. |
Hydrogen content in petroleum products varies from 12 to 15% (by weight). As a result the difference between gross and net heating value of petroleum fuels varies in the range of __________ kcal/kg. |
| A. | 600-750 |
| B. | 250-350 |
| C. | 1000-1500 |
| D. | 2000-2500 |
| Answer» B. 250-350 | |
| 89. |
Which of the following processes is used for the production of petroleum coke ? |
| A. | Stabilisation |
| B. | Visbreaking |
| C. | Cracking |
| D. | Reforming |
| Answer» D. Reforming | |
| 90. |
Molecular weight of petrol may be about |
| A. | 40-60 |
| B. | 100-130 |
| C. | 250-300 |
| D. | 350-400 |
| Answer» C. 250-300 | |
| 91. |
High aniline point of diesel indicates that, it |
| A. | is highly aromatic. |
| B. | has a large ignition delay. |
| C. | is highly paraffinic. |
| D. | has a low diesel index. |
| Answer» D. has a low diesel index. | |
| 92. |
Which of the following has the highest octane number ? |
| A. | Aromatics |
| B. | i-paraffins |
| C. | Naphthenes |
| D. | Olefins |
| Answer» B. i-paraffins | |
| 93. |
Deoiling of wax is done by its |
| A. | heating |
| B. | cooling |
| C. | solvent extraction |
| D. | both(b)&(c) |
| Answer» E. | |
| 94. |
Which of the following has the highest flash point of all ? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» E. | |
| 95. |
LPG stands for |
| A. | liquid petroleum gas |
| B. | liquified petrol gas |
| C. | liquid petrol gas |
| D. | liquefied petroleum gas |
| Answer» E. | |
| 96. |
Catalyst used in catalytic polymerisation which produces polymer gasoline is |
| A. | H2SO4 |
| B. | H3PO4 |
| C. | both (a) and (b) |
| D. | AlCl3 |
| Answer» D. AlCl3 | |
| 97. |
Which of the following processes consumes hydrogen ? |
| A. | Fluid catalytic cracking |
| B. | Visbreaking |
| C. | Propane deasphalting |
| D. | None of these |
| Answer» B. Visbreaking | |
| 98. |
Name the endothermic reaction out of the following: |
| A. | Catalytic cracking. |
| B. | Hydrocracking. |
| C. | Dehydrogeneration of naphthene to produce aromatic. |
| D. | Catalytic polymerisation. |
| Answer» D. Catalytic polymerisation. | |
| 99. |
Molecular weight of crude petroleum may be around |
| A. | 50 |
| B. | 250 |
| C. | 1500 |
| D. | 5000 |
| Answer» D. 5000 | |
| 100. |
The first crude oil refinery of India is located at |
| A. | Naharkatiya |
| B. | Digboi |
| C. | Kochin |
| D. | Madras |
| Answer» C. Kochin | |