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.
| 151. |
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 | |
| 152. |
Higher vapour pressure of gasoline indicates _________________? |
| A. | Low flash point |
| B. | High breathing loss |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» E. | |
| 153. |
Higher pressure in the reforming reactor________________? |
| A. | Increases coke formation |
| B. | Increases the rate of reaction |
| C. | Produces high octane number gasoline |
| D. | None of these |
| Answer» E. | |
| 154. |
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 ____________________? |
| A. | Thermal cracking |
| B. | Gum formation |
| C. | Coking |
| D. | Discoloration |
| Answer» D. Discoloration | |
| 155. |
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 | |
| 156. |
High aniline point of a petrofuel (say diesel) indicates that ________________? |
| A. | It is highly aromatic in nature |
| B. | It is highly paraffinic in nature |
| C. | It has a very low diesel index |
| D. | Its ignition quality is very poor |
| Answer» C. It has a very low diesel index | |
| 157. |
hich of the following is the most suitable feed for platforming process (reforming) ? |
| A. | Olefinic hydrocarbon |
| B. | Naphtha |
| C. | Fuel oil |
| D. | Atmospheric residue |
| Answer» B. Naphtha | |
| 158. |
H/C ratio (by weight) for the same number of carbon atoms is the highest in case of____________________? |
| A. | Aromatics |
| B. | Paraffins |
| C. | Olefins |
| D. | Naphthenes |
| Answer» E. | |
| 159. |
Gum formation in stored gasoline is mainly due to the ____________________? |
| A. | Alkylation of unsaturated |
| B. | Presence of sulphur |
| C. | Oxidation & polymerisation of unsaturated |
| D. | Higher aromatic content |
| Answer» C. Oxidation & polymerisation of unsaturated | |
| 160. |
Good quality kerosene should have__________________? |
| A. | Low smoke point |
| B. | High smoke point |
| C. | High aromatics content |
| D. | Low paraffins content |
| Answer» C. High aromatics content | |
| 161. |
Glycol added to petrol acts as a/an ________________ agent ? |
| A. | Anti-knocking |
| B. | Anti-icing |
| C. | Anti-gum forming |
| D. | Dewaxing |
| Answer» C. Anti-gum forming | |
| 162. |
Gasoline yield in catalytic reforming of naphtha may be about _________________ percent by weight? |
| A. | 85 |
| B. | 65 |
| C. | 50 |
| D. | 98 |
| Answer» B. 65 | |
| 163. |
Gasoline extracted from natural gas (by compression and cooling) is called the ___________ gasoline? |
| A. | Polymer |
| B. | Unleaded |
| C. | Casing head |
| D. | Straight run |
| Answer» C. Casing head | |
| 164. |
Furfural solvent extraction is used for upgrading (by dissolving aromatics) ? |
| A. | Naphtha |
| B. | Lubricating oils |
| C. | Wax |
| D. | Cracking feedstock |
| Answer» C. Wax | |
| 165. |
Fuel oil is subjected to visbreaking to reduce its_______________? |
| A. | Pour point |
| B. | Viscosity |
| C. | Pressure drop on pumping |
| D. | All A., B. and C. |
| Answer» E. | |
| 166. |
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. | |
| 167. |
Flash point of motor gasoline may be around ______________ °C? |
| A. | 10 |
| B. | 45 |
| C. | 100 |
| D. | 150 |
| Answer» C. 100 | |
| 168. |
Flash point of atmospheric distillation residue is determined by ______________ apparatus? |
| A. | Pensky-Martens (closed cup type) |
| B. | Abel |
| C. | Cleveland (open cup type) |
| D. | None of these |
| Answer» D. None of these | |
| 169. |
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 | |
| 170. |
Flash point of an oil is determined by the _____________________? |
| A. | Pensky Martens apparatus |
| B. | Ramsbottom apparatus |
| C. | Saybolt viscometer |
| D. | Conradson apparatus |
| Answer» B. Ramsbottom apparatus | |
| 171. |
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 A., B. and C. |
| Answer» B. Amount of low boiling fraction present | |
| 172. |
Feedstock for polymerisation is__________________? |
| A. | Naphtha |
| B. | Cracked gases rich in C2 & C4 olefins |
| C. | Low boiling aromatics |
| D. | None of these |
| Answer» C. Low boiling aromatics | |
| 173. |
Feed for reforming is generally___________________? |
| A. | Naphtha or straight run gasoline |
| B. | Reduced crude |
| C. | Vacuum gas oil |
| D. | Atmospheric gas oil |
| Answer» B. Reduced crude | |
| 174. |
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 | |
| 175. |
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 | |
| 176. |
Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about ________________ ppm? |
| A. | 1 |
| B. | 50 |
| C. | 5000 |
| D. | 10000 |
| Answer» C. 5000 | |
| 177. |
Ethyl mercaptan is a/an ___________________ compound? |
| A. | Sulphur |
| B. | Nitrogen |
| C. | Oxygen |
| D. | None of these |
| Answer» B. Nitrogen | |
| 178. |
Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely miscible. It means that the aniline point of the diesel is _______________ the room temperature? |
| A. | More than |
| B. | Less than |
| C. | Same as |
| D. | Either more or less; depends on the room temperature |
| Answer» D. Either more or less; depends on the room temperature | |
| 179. |
Electrical desalting of crude oil removes the _______________ impurities? |
| A. | Oleophilic |
| B. | Oleophobic |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» C. Both A. and B. | |
| 180. |
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 | |
| 181. |
Diesel used in naval applications has a minimum cetane number of ___________________? |
| A. | 25 |
| B. | 35 |
| C. | 45 |
| D. | 65 |
| Answer» D. 65 | |
| 182. |
Diesel index is defined as_________________? |
| A. | (°API) × (Aniline Point, °F)/100 |
| B. | (°API) × (Aniline Point, °C)/100 |
| C. | (°API) × (100)/Aniline Point, °F |
| D. | (°API) × (100)/Aniline Point, °C |
| Answer» B. (°API) × (Aniline Point, °C)/100 | |
| 183. |
Diesel index (an alternative index for expressing the quality of diesel) is_______________? |
| A. | Determined by using a test engine |
| B. | Not related to aniline point |
| C. | Equal to cetane number plus 3 |
| D. | All A., B. & C. |
| Answer» D. All A., B. & C. | |
| 184. |
_____________ determination is not a very significant and important test for gasoline? |
| A. | Gum & sulphur content |
| B. | Viscosity |
| C. | Octane number |
| D. | Reid vapor pressure |
| Answer» C. Octane number | |
| 185. |
Deoiling of wax is done by its _________________? |
| A. | Heating |
| B. | Cooling |
| C. | Solvent extraction |
| D. | Both B. & C. |
| Answer» E. | |
| 186. |
Deoiling is the process of removal of oil from wax. It is done by the _______________ process? |
| A. | Solvent extraction |
| B. | Sweating |
| C. | Resettling |
| D. | All A., B. & C. |
| Answer» E. | |
| 187. |
Dearomatization of kerosene (by liquid sulphur dioxide extraction) is done to________________? |
| A. | Increase its smoke point |
| B. | Improve its oxidation stability |
| C. | Decrease the breathing loss |
| D. | None of these |
| Answer» C. Decrease the breathing loss | |
| 188. |
Crude petroleum oil is a _______________ fuel? |
| A. | Primary |
| B. | Fossil |
| C. | Both A. & B. |
| D. | Secondary |
| Answer» D. Secondary | |
| 189. |
Crude topping column operates at ________________ pressure? |
| A. | Atmospheric |
| B. | 10 atm |
| C. | Vacuum |
| D. | 3 atm |
| Answer» B. 10 atm | |
| 190. |
Crude oil produced by Indian oil fields are predominantly _______________ in nature? |
| A. | Paraffinic |
| B. | Naphthenic |
| C. | Asphaltic |
| D. | Mixed base |
| Answer» D. Mixed base | |
| 191. |
Crude oils containing more than ____________ kg of total salts (expressed in terms of NaCl) per thousand barrel is called a ‘salty crude’ ? |
| A. | 1 |
| B. | 5 |
| C. | 15 |
| D. | 25 |
| Answer» C. 15 | |
| 192. |
Crude oil is transported inland from oil field to refineries, mainly by the _____________________? |
| A. | Road tankers |
| B. | Rail tankers |
| C. | Underground pipelines |
| D. | None of these |
| Answer» D. None of these | |
| 193. |
Crude oil is subjected to vacuum distillation in the last stage, because_________________? |
| A. | High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose |
| B. | Lighter/low boiling products are prone to thermal decomposition |
| C. | High purity products can be obtained thereby |
| D. | None of these |
| Answer» B. Lighter/low boiling products are prone to thermal decomposition | |
| 194. |
Crude oil is pumped by a _______________ pump? |
| A. | Gear |
| B. | Centrifugal |
| C. | Screw |
| D. | Reciprocating |
| Answer» C. Screw | |
| 195. |
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 | |
| 196. |
______________ converts n-paraffins to i-paraffins ? |
| A. | Alkylation |
| B. | Polymerisation |
| C. | Isomerisation |
| D. | None of these |
| Answer» D. None of these | |
| 197. |
Concentration of H2SO4 catalyst in alkylation is kept between 90-98%, because H2SO4 having concentration? |
| A. | Less than 90% promotes polymerisation |
| B. | More than 98% promotes cracking |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 198. |
Complete removal of _____________ from gasoline is done by Unisol process using caustic soda and methyl alcohol? |
| A. | Waxes |
| B. | Mercaptans |
| C. | Asphalt |
| D. | Diolefins |
| Answer» C. Asphalt | |
| 199. |
CnH2n is the general formula for_______________? |
| A. | Olefins |
| B. | Naphthenes |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 200. |
Clay treatment of petroleum products __________________? |
| A. | Decolorizes & stabilises cracked gasoline |
| B. | Desulphurise straight run gasoline & kerosene |
| C. | Adsorb arsenic from feedstock to catalytic reforming |
| D. | All A., B. & C. |
| Answer» E. | |