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.
| 251. |
Mercapsol and Unisol processes are meant for the |
| A. | dearomatisation of kerosene |
| B. | removal of mercaptans |
| C. | dewaxing |
| D. | decoloration |
| Answer» C. dewaxing | |
| 252. |
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 | |
| 253. |
Percentage of straight run gasoline in a typical crude oil may be around |
| A. | 6 |
| B. | 18 |
| C. | 38 |
| D. | 52 |
| Answer» E. | |
| 254. |
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. | |
| 255. |
Crude oil produced by Indian oil fields are predominantly __________ in nature. |
| A. | paraffinic |
| B. | naphthenic |
| C. | asphaltic |
| D. | mixed base |
| Answer» D. mixed base | |
| 256. |
Butadiene is a/an |
| A. | di-olefin |
| B. | naphthene |
| C. | aromatic |
| D. | olefin |
| Answer» B. naphthene | |
| 257. |
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 (a), (b) & (c). |
| Answer» E. | |
| 258. |
Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about __________ kms. |
| A. | 0.1 to 0.5 |
| B. | 1.5 to 4.5 |
| C. | 7.5 to 12.5 |
| D. | 15-20 |
| Answer» C. 7.5 to 12.5 | |
| 259. |
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» D. Naphthenic acid | |
| 260. |
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 | |
| 261. |
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. | |
| 262. |
Aniline point of high speed diesel may be about __________ °C.$ |
| A. | 35 |
| B. | 70 |
| C. | 105 |
| D. | 150 |
| Answer» C. 105 | |
| 263. |
Crude petroleum oil is a __________ fuel. |
| A. | primary |
| B. | fossil |
| C. | both (a) & (b) |
| D. | secondary |
| Answer» D. secondary | |
| 264. |
Which of the following factors does not govern the mechanism of petroleum formation from organic sources ? |
| A. | pH of the soil |
| B. | Bacterial action |
| C. | Heat |
| D. | Pressure |
| Answer» B. Bacterial action | |
| 265. |
Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with |
| A. | methyl alcohol |
| B. | ethyl alcohol |
| C. | methane |
| D. | ethane |
| Answer» B. ethyl alcohol | |
| 266. |
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 | |
| 267. |
Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute). |
| A. | 43743 |
| B. | 30-80 |
| C. | 150-250 |
| D. | 350-400 |
| Answer» C. 150-250 | |
| 268. |
Which of the following fractions of petroleum contains maximum sulphur ? |
| A. | Diesel |
| B. | Gasoline |
| C. | Naphtha |
| D. | Atmospheric residue |
| Answer» E. | |
| 269. |
The main reaction in reforming is the |
| A. | dehydrogenation of naphthenes. |
| B. | hydrogenation of naphthenes. |
| C. | hydrocracking of paraffins. |
| D. | saturation of olefins. |
| Answer» B. hydrogenation of naphthenes. | |
| 270. |
Aniline point is the |
| A. | characteristic property of diesel & lubricating oils. |
| B. | measure of aromatic content of oil. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 271. |
Which is an anticing compound ? |
| A. | Amyl nitrate |
| B. | Alcohals |
| C. | Mercaptans |
| D. | Pyridine |
| Answer» C. Mercaptans | |
| 272. |
LPG when brought to atmospheric pressure & temperature will be a |
| A. | liquid lighter than water. |
| B. | liquid heavier than water. |
| C. | gas lighter than air. |
| D. | gas heavier than air. |
| Answer» E. | |
| 273. |
Ethyl mercaptan is a/an __________ compound. |
| A. | sulphur |
| B. | nitrogen |
| C. | oxygen |
| D. | none of these |
| Answer» B. nitrogen | |
| 274. |
In catalytic alkylation, higher iso-butane to olefin ratio gives |
| A. | low final boiling point product |
| B. | higher yield |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» B. higher yield | |
| 275. |
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 | |
| 276. |
In hydrofining catalytic desulphurisation process for sweetening of petroleum products, use of hydrogen |
| A. | enhances the desulphurisation process. |
| B. | minimises coke formation. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 277. |
Antioxidants are added in petrol to |
| A. | impart colour to it, for easy identification. |
| B. | minimise the gum formation. |
| C. | prevent icing of the carburettor. |
| D. | prevent the lead build up in engines. |
| Answer» C. prevent icing of the carburettor. | |
| 278. |
The most commonly used feed stock for the reforming reactor is |
| A. | heavy fuel oil |
| B. | residuum |
| C. | straight run gasdine |
| D. | casing head gasoline |
| Answer» D. casing head gasoline | |
| 279. |
Octane number of gasoline is a measure of its |
| A. | resistance to knock. |
| B. | ignition delay. |
| C. | ignition temperature. |
| D. | smoke point. |
| Answer» B. ignition delay. | |
| 280. |
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» C. Saybolt chromometer | |
| 281. |
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). | |
| 282. |
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 | |
| 283. |
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. | |
| 284. |
Casing head gasoline is the liquid |
| A. | butane. |
| B. | propane. |
| C. | natural gas. |
| D. | gasoline separated from wet natural gas by compression. |
| Answer» B. propane. | |
| 285. |
Stabilisation of gasoline (petrol) means |
| A. | removal of dissolved gases from it. |
| B. | increasing its oxidation stability. |
| C. | improving its lead susceptibility. |
| D. | increasing its vapour pressure. |
| Answer» B. increasing its oxidation stability. | |
| 286. |
Which of the following gasolines (unleaded) has the least octane number ? |
| A. | Catalytically cracked gasoline |
| B. | Straight run gasoline |
| C. | Catalytically reformed gasoline |
| D. | Polymer gasoline |
| Answer» C. Catalytically reformed gasoline | |
| 287. |
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 | |
| 288. |
Flash point of atmospheric distillation residue is determined by __________ apparates. |
| A. | Pensky-Martens (closed cup type). |
| B. | Abel. |
| C. | Cleveland (open cup type) |
| D. | none of these. |
| Answer» D. none of these. | |
| 289. |
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 | |
| 290. |
Furfural solvent extraction is used for upgrading (by dissolving aromatics) |
| A. | naphtha |
| B. | lubricating oils |
| C. | wax |
| D. | cracking feedstock |
| Answer» C. wax | |
| 291. |
Testing of the knocking characteristics of petrofuels is done in a __________ engine. |
| A. | Carnot |
| B. | CFR (Co-operative fuel research) |
| C. | Stirling |
| D. | diesel |
| Answer» C. Stirling | |
| 292. |
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. | |
| 293. |
Which of the following processes in oil refinery does not employ 'cracking' ? |
| A. | Coking |
| B. | Visbreaking |
| C. | Pyrolysis |
| D. | None of these |
| Answer» E. | |
| 294. |
Naphthenic acid is a/an __________ compound. |
| A. | sulphur |
| B. | nitrogen |
| C. | oxygen |
| D. | none of these |
| Answer» D. none of these | |
| 295. |
__________ is not an important refinery process for upgrading the quality of lubricating oil. |
| A. | Deoiling |
| B. | Solvent refinning |
| C. | Clay treatment |
| D. | Hydrotreatment |
| Answer» B. Solvent refinning | |
| 296. |
Octane number (unleaded) of reformed gasoline may be upto |
| A. | 60 |
| B. | 70 |
| C. | 80 |
| D. | 90 |
| Answer» E. | |
| 297. |
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 | |
| 298. |
Sulphur content in lighter and heavier petroleum products is generally determined respectively by |
| A. | lamp method and bomb method. |
| B. | bomb method and lamp method. |
| C. | bomb method and quartz tube method. |
| D. | quartz tube method and lamp method. |
| Answer» C. bomb method and quartz tube method. | |
| 299. |
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 | |
| 300. |
Catalyst used in the catalytic cracking is |
| A. | silica-alumina |
| B. | silica gel |
| C. | vanadium pentoxide |
| D. | nickel |
| Answer» B. silica gel | |