MCQOPTIONS
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MCQOPTIONS
This section includes 281 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
_ Which is the most undesirable component in kerosene?$? |
| A. | Aromatics |
| B. | I-paraffins |
| C. | N-paraffins |
| D. | Naphthenes |
| Answer» B. I-paraffins | |
| 102. |
_ Main constituent of natural gas is$? |
| A. | CH‚ÇÑ |
| B. | C‚ÇÇH‚ÇÇ |
| C. | C‚ÇÇH‚ÇÑ |
| D. | C‚ÇÇH‚ÇÜ |
| Answer» B. C‚Äö√á√áH‚Äö√á√á | |
| 103. |
_ Gum formation in stored gasoline is mainly due to the$? |
| A. | Alkylation of unsaturates |
| B. | Presence of sulphur |
| C. | Oxidation & polymerisation of unsaturates |
| D. | Higher aromatic content |
| Answer» C. Oxidation & polymerisation of unsaturates | |
| 104. |
_ Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has$? |
| A. | High pour point and low smoke point |
| B. | Low viscosity index |
| C. | High self-ingnition temperature |
| D. | All of the above |
| Answer» C. High self-ingnition temperature | |
| 105. |
_ Penetration test determines the __________ of the grease.$? |
| A. | Stiffness |
| B. | Lubricating properties (e.g. oilness) |
| C. | Service temperature |
| D. | Variation in viscosity with temperature |
| Answer» B. Lubricating properties (e.g. oilness) | |
| 106. |
_ Molecular weight of petrol may be about$? |
| A. | 40-60 |
| B. | 100-130 |
| C. | 250-300 |
| D. | 350-400 |
| Answer» C. 250-300 | |
| 107. |
_ Which of the following is desirable in diesel and kerosene but is undersirable in gasoline?$? |
| A. | Aromatics |
| B. | Mercaptans |
| C. | Paraffins |
| D. | Naphthenic acid |
| Answer» B. Mercaptans | |
| 108. |
_ Waxes present in petroleum products$? |
| A. | Can be separated out by distillation |
| B. | Are not soluble in them |
| C. | Crystallise out at low temperature |
| D. | Decrease their viscosity |
| Answer» D. Decrease their viscosity | |
| 109. |
_ Octane numbers of motor gasoline used in India and America are respectively$? |
| A. | 87 & 94 |
| B. | 94 & 87 |
| C. | 94 & 100 |
| D. | 83 & 100 |
| Answer» B. 94 & 87 | |
| 110. |
_ High aniline point of diesel indicates that, it$? |
| 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 | |
| 111. |
_ For gasoline, the flash point (<50°C) is determined by the$? |
| A. | Abel apparatus |
| B. | Pensky-Marten's apparatus |
| C. | Saybolt chromometer |
| D. | None of these |
| Answer» E. | |
| 112. |
_ Solvent used for dewaxing of petroleum products are$? |
| A. | Furfural |
| B. | Methyl ethyl ketone (MEK) |
| C. | Propane |
| D. | Both B & C |
| Answer» D. Both B & C | |
| 113. |
_ Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the$? |
| A. | Elimination of solvent drying facility |
| B. | Higher nitration temperature |
| C. | Lower solvent dilution ratio |
| D. | All of the above |
| Answer» E. | |
| 114. |
_ Aniline point of the diesel is a measure of its __________ content.$? |
| A. | Aromatic |
| B. | Paraffin |
| C. | Olefin |
| D. | Naphthene |
| Answer» C. Olefin | |
| 115. |
_ Which of the following petroleum products contain minimum sulphur?$? |
| A. | Naphtha |
| B. | Kerosene |
| C. | LSHS |
| D. | Furnace oil |
| Answer» B. Kerosene | |
| 116. |
_ Liquefied Petroleum Gas (LPG) in domestic use cylinders is in the liquid form. The density of LPG in liquid form is about __________ of that of water (i.e. 1 gm/c.c).$? |
| A. | One fourth |
| B. | One third |
| C. | Half |
| D. | One eighth |
| Answer» D. One eighth | |
| 117. |
_ The catalytic cracking of heavier petroleum fraction is done to produce mainly$? |
| A. | Gasoline |
| B. | Asphalt |
| C. | Diesel oil |
| D. | Tar |
| Answer» D. Tar | |
| 118. |
_ Aniline point of high speed diesel may be about __________ °C.$? |
| A. | 35 |
| B. | 70 |
| C. | 105 |
| D. | 150 |
| Answer» C. 105 | |
| 119. |
_ Furfural solvent extraction is used for upgrading (by dissolving aromatics)$? |
| A. | Naphtha |
| B. | Lubricating oils |
| C. | Wax |
| D. | Cracking feedstock |
| Answer» C. Wax | |
| 120. |
_ Fuel oil is subjected to visbreaking to reduce its$? |
| A. | Pour point |
| B. | Viscosity |
| C. | Pressure drop on pumping |
| D. | All of the above |
| Answer» E. | |
| 121. |
_ Catalyst used in the catalytic cracking is$? |
| A. | Silica-alumina |
| B. | Silica gel |
| C. | Vanadium pentoxide |
| D. | Nickel |
| Answer» B. Silica gel | |
| 122. |
_ Straight run petrol as compared to methyl/ethyl alcohol has$? |
| A. | Lower calorific value |
| B. | Lower octane number |
| C. | Higher specific gravity |
| D. | Higher ignition temperature |
| Answer» C. Higher specific gravity | |
| 123. |
_ Catalytic desulphurisation process used for sweetening of straight run gasoline and kerosene uses __________ as catalyst.$? |
| A. | Bauxite |
| B. | Fuller's earth |
| C. | Activated clay |
| D. | All of the above |
| Answer» E. | |
| 124. |
_ Smoke point of a good burning kerosene may be around __________ mm.$? |
| A. | 0-5 |
| B. | 20-25 |
| C. | 60-75 |
| D. | 100-120 |
| Answer» C. 60-75 | |
| 125. |
_ Which of the following has the highest flash point of all?$? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» E. | |
| 126. |
_ Which of the following processes in oil refinery does not employ 'cracking'?$? |
| A. | Coking |
| B. | Visbreaking |
| C. | Pyrolysis |
| D. | None of these |
| Answer» E. | |
| 127. |
_ Most commonly used crude heater before the fractionation tower in a refinery is the __________ heater.$? |
| A. | Electric immersion |
| B. | Pipestill |
| C. | Steam coil |
| D. | None of these |
| Answer» C. Steam coil | |
| 128. |
_ The colour of gasoline is an indication of its$? |
| A. | Octane number |
| B. | Lead susceptibility |
| C. | Gum forming tendency & thoroughness of refining |
| D. | None of these |
| Answer» D. None of these | |
| 129. |
_ 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.$? |
| A. | Decreases |
| B. | Increases |
| C. | Remains unchanged |
| D. | Decreases linearly |
| Answer» C. Remains unchanged | |
| 130. |
_ Waxy crudes are treated with chemical additives mainly to$? |
| A. | Depress its pour point |
| B. | Dissolve wax |
| C. | Precipitate wax |
| D. | Remove wax |
| Answer» B. Dissolve wax | |
| 131. |
__Clay treatment is used to remove__ |
| A. | Salt from the crude oil |
| B. | Colour & dissolved gases from cracked gasoline |
| C. | Wax from lube oil |
| D. | None of these |
| Answer» D. None of these | |
| 132. |
__Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke?__ |
| A. | Naphtha |
| B. | Vacuum residue |
| C. | Light gas oil |
| D. | Diesel |
| Answer» C. Light gas oil | |
| 133. |
__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 | |
| 134. |
__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. | |
| 135. |
__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 | |
| 136. |
__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 of the above |
| Answer» E. | |
| 137. |
__Aniline point is the temperature at which__ |
| A. | Equal weight of diesel & the aniline are completely miscible |
| B. | Equal weight of aniline & the test sample are completely miscible |
| C. | Equal volume of aniline & the test sample are completely miscible |
| D. | Aniline vaporises |
| Answer» D. Aniline vaporises | |
| 138. |
__Aromatics have the highes __________ of all the hydrocarbons of same carbon atoms.__ |
| A. | Smoke point |
| B. | Octane number |
| C. | Cetane number |
| D. | Viscosity |
| Answer» C. Cetane number | |
| 139. |
__Flash point of an oil gives an idea of the__ |
| A. | Nature of boiling point diagram of the system |
| B. | Amount of low boiling fraction present |
| C. | Explosion hazards |
| D. | All of the above |
| Answer» B. Amount of low boiling fraction present | |
| 140. |
__Smoke point of kerosene expresses its__ |
| A. | Burning characteristics |
| B. | Luminosity characteristics |
| C. | Aromatic content directly |
| D. | Lamp wick wetting characteristics |
| Answer» B. Luminosity characteristics | |
| 141. |
__The doctor's solution comprises of sodium plumbite in__ |
| A. | Alcohal |
| B. | Water |
| C. | Aqueous caustic soda |
| D. | Soda ash |
| Answer» D. Soda ash | |
| 142. |
__The yield of straight run LPG from crude oil is about __________ weight percent.__ |
| A. | 20-25 |
| B. | 1-1.5 |
| C. | 10-15 |
| D. | 0.1-0.2 |
| Answer» C. 10-15 | |
| 143. |
__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 | |
| 144. |
__Presence of aromatics in__ |
| A. | Diesel increases its cetane number |
| B. | Kerosene increases its smoke point |
| C. | Petrol increases its octane number |
| D. | All of the above |
| Answer» D. All of the above | |
| 145. |
_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.$? |
| A. | 1 |
| B. | 20 |
| C. | 100 |
| D. | 500 |
| Answer» C. 100 | |
| 146. |
_Solution used in Doctor's treatment for the removal of mercaptans is$? |
| A. | Sodium hydroxide |
| B. | Sodium plumbite |
| C. | Cupric chloride |
| D. | Potassium isobutyrate |
| Answer» C. Cupric chloride | |
| 147. |
_Higher viscosity of lubricating oil usually signifies$? |
| A. | Lower Reid vapour pressure |
| B. | Higher acid number |
| C. | Higher flash point and fire point |
| D. | Lower flash point and fire point |
| Answer» D. Lower flash point and fire point | |
| 148. |
_Reforming$? |
| 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 of the above |
| Answer» E. | |
| 149. |
_Removal of light fractions from crude oil is called its$? |
| A. | Sweetening |
| B. | Dehydration |
| C. | Stabilisation |
| D. | Visbreaking |
| Answer» D. Visbreaking | |
| 150. |
_Liquefied Petroleum Gas (LPG) is mainly a mixture of$? |
| A. | Propane & butane |
| B. | Methane & ethane |
| C. | High boiling olefins |
| D. | High boiling naphthenes |
| Answer» B. Methane & ethane | |