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.
| 351. |
Lane and Garton classification of petroleum is based on its |
| A. | composition |
| B. | specific gravity |
| C. | optical properties |
| D. | viscosity |
| Answer» C. optical properties | |
| 352. |
Catalyst used in catalytic reforming is |
| A. | platinum on alumina |
| B. | nickel |
| C. | iron |
| D. | aluminium chloride |
| Answer» B. nickel | |
| 353. |
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). | |
| 354. |
Presence of sulphur in gasoline |
| A. | leads to corrosion. |
| B. | increases lead susceptibility. |
| C. | decreases gum formation. |
| D. | helps during stabilisation. |
| Answer» B. increases lead susceptibility. | |
| 355. |
The most widely used crude topping column in refineries is the __________ column. |
| A. | bubble-cap |
| B. | packed bed |
| C. | fluidised bed |
| D. | perforated plate |
| Answer» B. packed bed | |
| 356. |
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. | |
| 357. |
Alkylation |
| A. | causes olefins to combine with each other. |
| B. | causes olefins to combine with iso-paraffins. |
| C. | converts iso-paraffin into olefin. |
| D. | converts olefin into paraffin. |
| Answer» C. converts iso-paraffin into olefin. | |
| 358. |
Which of the following is not a sulphur compound present in petroleum ? |
| A. | Thiophenes |
| B. | Mercaptans |
| C. | Sulphones |
| D. | Pyroles |
| Answer» E. | |
| 359. |
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 (a), (b) and (c) |
| Answer» E. | |
| 360. |
Pour point and freezing point is equal for |
| A. | petrol |
| B. | diesel |
| C. | water |
| D. | crude petroleum |
| Answer» D. crude petroleum | |
| 361. |
The main use of heavy gas oil produced by the vacuum distillation unit is as a |
| A. | blending component for kerosene. |
| B. | blending component for petrol. |
| C. | feedstock for fluid catalytic cracking unit. |
| D. | none of these. |
| Answer» D. none of these. | |
| 362. |
Absolute vapor pressure of petrofuels is found by Reid bomb which is heated in water bath to 100°F. In Reid apparatus, the ratio of the volume of air chamber to that of the liquid fuel chamber is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 363. |
The most suitable solvent for deasphalting vacuum residue is |
| A. | propane |
| B. | methyl ethyl ketone |
| C. | doctor's solution |
| D. | methanol amine |
| Answer» C. doctor's solution | |
| 364. |
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 | |
| 365. |
Visbreaking process is used mainly for making |
| A. | high cetane diesel |
| B. | high octane gasoline |
| C. | fuel oil |
| D. | smoke free kerosene |
| Answer» D. smoke free kerosene | |
| 366. |
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. | |
| 367. |
LSHS is a type of furnace oil, which |
| A. | is more viscous than high viscosity furnace oil (HVFO). |
| B. | stands for low sulphur heavy stock. |
| C. | is an ideal fuel for metallurgical furnaces due to its lower sulphur content (< 1%). |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 368. |
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. | |
| 369. |
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. | |
| 370. |
Catalyst used in alkylation process is |
| A. | sulphuric acid |
| B. | nickel |
| C. | silica gel |
| D. | alumina |
| Answer» B. nickel | |
| 371. |
Choose the correct statement regarding thermal cracking. |
| A. | Moderate changes in operating temperature does not change the depth of cracking. |
| B. | Increased residence time results in the decreased severity of cracking. |
| C. | At low pressure, the yield of lighter hydrocarbons are more. |
| D. | Greater depth of cracking gives lower octane number gasoline. |
| Answer» E. | |
| 372. |
In catalytic cracking, the |
| A. | gasoline obtained has a very low octane number. |
| B. | pressure & temperature is very high. |
| C. | gasoline obtained has very high aromatic content. |
| D. | gasoline obtained has very high amount of gum forming compounds. |
| Answer» D. gasoline obtained has very high amount of gum forming compounds. | |
| 373. |
True boiling point apparatus is used for the |
| A. | determination of characterisation factor. |
| B. | evaluation of oil stocks. |
| C. | determination of true vapour pressure. |
| D. | none of these. |
| Answer» E. | |
| 374. |
Bottom product of atmospheric pressure crude oil distillation column is termed as |
| A. | reduced crude |
| B. | heavy ends |
| C. | asphalt |
| D. | residuum |
| Answer» B. heavy ends | |
| 375. |
Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about |
| A. | 0.1 |
| B. | 1 |
| C. | 2.5 |
| D. | 3.5 |
| Answer» C. 2.5 | |
| 376. |
__________ test is done to find out the softening point of bitumen. |
| A. | Impact |
| B. | Ball and ring |
| C. | Flame |
| D. | Viscosity |
| Answer» C. Flame | |
| 377. |
Which of the following has the minimum °API gravity of all? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» E. | |
| 378. |
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 | |
| 379. |
Phenols are added in gasoline to |
| A. | improve the octane number. |
| B. | act as an antioxidant. |
| C. | reduce its viscosity. |
| D. | increase its pour point. |
| Answer» C. reduce its viscosity. | |
| 380. |
Cetane number of a diesel fuel is the measure of its |
| A. | ignition delay |
| B. | smoke point |
| C. | viscosity |
| D. | oxidation stability |
| Answer» B. smoke point | |
| 381. |
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 (a), (b) & (c) |
| Answer» E. | |
| 382. |
The best method of determining sulphur in crude oil is by the __________ method. |
| A. | Kjeldah |
| B. | Duma |
| C. | Bomb calorimeter |
| D. | Junkar's calorimeter |
| Answer» D. Junkar's calorimeter | |
| 383. |
Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene. |
| A. | Smoking tendency of hydrocarbons increases in the order : paraffins ‚Üí isoparaffins ‚Üí naphthenes ‚Üí aromatics. |
| B. | Smoking tendency of paraffins increases with decrease in its molecular weight. |
| C. | Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond. |
| D. | Smoking tendency of aromatics decreases with increase in its molecular weight. |
| Answer» C. Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond. | |
| 384. |
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 | |
| 385. |
Mercaptans are |
| A. | low boiling sulphur compounds. |
| B. | added in LPG cylinders to detect gas leakage by its smell. |
| C. | undesirable in petrol, as they reduce its octane number. |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 386. |
Aniline point of the diesel is a measure of its __________ content. |
| A. | aromatic |
| B. | paraffin |
| C. | olefin |
| D. | naphthene |
| Answer» B. paraffin | |
| 387. |
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» E. | |
| 388. |
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 | |
| 389. |
Tanks used for the storage of petroleum products (which are inflammable) should be painted with a __________ paint. |
| A. | black |
| B. | white |
| C. | red |
| D. | yellow |
| Answer» C. red | |
| 390. |
Which of the following has the highest gum forming tendency in gosoline ? |
| A. | Paraffins |
| B. | Diolefins |
| C. | Aromatics |
| D. | Naphthenes |
| Answer» C. Aromatics | |
| 391. |
Which of the following tests is not done for transformer oil ? |
| A. | Flash point and acid value. |
| B. | Aniline point. |
| C. | Dielectric strength. |
| D. | Copper strip corrosion test. |
| Answer» C. Dielectric strength. | |
| 392. |
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 | |
| 393. |
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 | |
| 394. |
In petroleum refining, the process used for conversion of hydrocarbons to aromatics is |
| A. | catalytic cracking |
| B. | catalytic reforming |
| C. | hydrotreating |
| D. | alkylation |
| Answer» C. hydrotreating | |
| 395. |
Hydrogen percentage (by weight) in crude petroleum may be about |
| A. | 5 |
| B. | 15 |
| C. | 25 |
| D. | 35 |
| Answer» C. 25 | |
| 396. |
Solvent used in the deasphalting process is |
| A. | furfurol |
| B. | phenol |
| C. | propane |
| D. | hexane |
| Answer» D. hexane | |
| 397. |
Presence of aromatics in |
| A. | diesel increases its cetane number. |
| B. | kerosene increases its smoke point. |
| C. | petrol increases its octane number. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 398. |
Which is the most undesirable component in kerosene ? |
| A. | Aromatics |
| B. | i-paraffins |
| C. | n-paraffins |
| D. | Naphthenes |
| Answer» B. i-paraffins | |
| 399. |
Solvent used in duo-sol extraction for lube oil upgradation is a mixture of |
| A. | propane & phenol-cresol mixture. |
| B. | methyl ethyl ketone & glycol. |
| C. | phenol & furfural. |
| D. | propane & liquid sulphur dioxide. |
| Answer» B. methyl ethyl ketone & glycol. | |
| 400. |
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 | |