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.
| 251. |
Crude topping column operates at __________ pressure.? |
| A. | Atmospheric |
| B. | 10 atm |
| C. | Vacuum |
| D. | 3 atm |
| Answer» B. 10 atm | |
| 252. |
An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating.? |
| A. | 5 |
| B. | 15 |
| C. | 40 |
| D. | 60 |
| Answer» D. 60 | |
| 253. |
Naphthenic acid is represented by? |
| A. | CnH2n+2O‚ÇÇ |
| B. | CnHsub>2n-2O‚ÇÇ |
| C. | CnHsub>2n+2O‚ÇÇ (n ‚â• 6) |
| D. | CnHsub>2n+6O₂ (n ≤ 6) |
| Answer» C. CnHsub>2n+2O‚Äö√á√á (n ‚Äö√¢‚Ä¢ 6) | |
| 254. |
The solvent used in Barisol dewaxing process is? |
| A. | Hexane |
| B. | Furfural |
| C. | Benzol and ethylene dichloride |
| D. | Methyl ethyl ketone (MEK) |
| Answer» D. Methyl ethyl ketone (MEK) | |
| 255. |
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 | |
| 256. |
Smoke point of a test sample of kerosene is found to be 15 mm. On removal of __________ from it, the smoke point rises to 25 mm.? |
| A. | N-paraffins |
| B. | Olefins |
| C. | Aromatics |
| D. | None of these |
| Answer» D. None of these | |
| 257. |
Viscosity index of a lubricating oil? |
| A. | Is the measure of its flash point |
| B. | Is the measure of variation of viscosity with temperature |
| C. | Should be low |
| D. | None of these |
| Answer» C. Should be low | |
| 258. |
Tetra-ethyl lead is added in gasoline to? |
| A. | Increase its smoke point |
| B. | Reduce gum formation |
| C. | Reduce the pour point |
| D. | Increase its octane number |
| Answer» E. | |
| 259. |
Aniline point is a property of the? |
| A. | Diesel |
| B. | LPG |
| C. | Naphtha |
| D. | Gasoline |
| Answer» D. Gasoline | |
| 260. |
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 | |
| 261. |
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 | |
| 262. |
With increase in the number of carbon and hydrogen atoms in hydrocarbon molecules, the density of petroleum products? |
| A. | Decreases |
| B. | Increases |
| C. | Remains same |
| D. | Unpredictable from the data |
| Answer» C. Remains same | |
| 263. |
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 | |
| 264. |
The reservoir rock containing petroleum has? |
| A. | Low porosity |
| B. | High permeability |
| C. | High porosity |
| D. | Both B and C |
| Answer» E. | |
| 265. |
Which of the following is an additive used for improving the cetane number of diesel?? |
| A. | Tetraethyl lead |
| B. | Tetramethyllead |
| C. | Ethyl nitrate or acetone |
| D. | None of these |
| Answer» B. Tetramethyllead | |
| 266. |
The main purpose of recycling the byproduct hydrogen gas in the reformer reactor is to? |
| A. | Obviate catalyst poisoning |
| B. | Maintain the reaction temperature |
| C. | Sustain the reactor pressure |
| D. | Hydrogenate the feed stock |
| Answer» D. Hydrogenate the feed stock | |
| 267. |
Octane number of n-heptane is assumed to be? |
| A. | 100 |
| B. | 0 |
| C. | 70 |
| D. | ‚à û |
| Answer» C. 70 | |
| 268. |
True vapour pressure of a petroleum fraction __________ Reid vapour pressure.? |
| A. | Is less than |
| B. | Is more than |
| C. | Is same as |
| D. | May be either more or less than |
| Answer» E. | |
| 269. |
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 | |
| 270. |
Which of the following is the most important property for a jet fuel? |
| A. | Cloud point |
| B. | Pour point |
| C. | Colour |
| D. | Freezing point |
| Answer» E. | |
| 271. |
Which of the following has the maximum °API gravity of all?$ |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» D. Furnace oil | |
| 272. |
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 | |
| 273. |
Which one of the following processes aims at producing higher yield of gaseous unsaturated hydrocarbons and aromatics like benzene & toluene? |
| A. | Reforming |
| B. | Pyrolysis |
| C. | Alkylation |
| D. | Hydrocracking |
| Answer» B. Pyrolysis | |
| 274. |
Which of the following reactions is undesirable in the production of catalytically reformed gasoline? |
| A. | Dehydrogenation of naphthene |
| B. | Dehydrogenation of lower paraffins |
| C. | Dehydrocyclisation of higher paraffins |
| D. | Isomerisation of paraffins |
| Answer» C. Dehydrocyclisation of higher paraffins | |
| 275. |
Which of the following is the most widely used cracking process in oil refineries? |
| A. | Dubbs process |
| B. | T.C.C. moving bed process |
| C. | Fluidised bed catalytic cracking process |
| D. | Houdry's fixed bed process |
| Answer» D. Houdry's fixed bed process | |
| 276. |
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 | |
| 277. |
Which of the following additives improves the cetane number of diesel? |
| A. | Amyl nitrate |
| B. | Ethyl mercaptan |
| C. | Napthenic acid |
| D. | Tetra ethyl lead |
| Answer» C. Napthenic acid | |
| 278. |
Which of the following categories of gasoline has the highest lead susceptibility? |
| A. | Straight run gasoline |
| B. | Platinum reformed gasoline |
| C. | Catalytical cracked gasoline |
| D. | Polymer gasoline |
| Answer» B. Platinum reformed gasoline | |
| 279. |
Breathing loss on storage of gasoline occurs due to the |
| A. | Presence of unsaturated air |
| B. | Fluctuation of ambient temperature during day and night |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» C. Both A & B | |
| 280. |
Which of the following is a naphthene? |
| A. | Butene |
| B. | Butadiene |
| C. | Cyclohexane |
| D. | Acetylene |
| Answer» D. Acetylene | |
| 281. |
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. | |