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.
| 301. |
Pick out the additive property of a lube oil out of following. |
| A. | °API gravity |
| B. | Specific gravity |
| C. | Viscosity |
| D. | Flashpoint |
| Answer» B. Specific gravity | |
| 302. |
Platforming is a __________ process. |
| A. | moving bed |
| B. | fluidised bed |
| C. | non-regenerative & fixed bed |
| D. | regenerative |
| Answer» D. regenerative | |
| 303. |
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 | |
| 304. |
Solvent used in Edeleanu process is |
| A. | furfural |
| B. | propane |
| C. | liquid SO2 |
| D. | phenol |
| Answer» D. phenol | |
| 305. |
__________ base crude oil is also called asphaltic crude. |
| A. | Paraffinic |
| B. | Naphthenic |
| C. | Mixed |
| D. | Aromatic |
| Answer» C. Mixed | |
| 306. |
Paraffin base crude oil as compared to asphalt base crude gives |
| A. | higher yield of straight run gasoline. |
| B. | higher octane number gasoline. |
| C. | lower viscosity index lube oil. |
| D. | poorer yield of lube oil. |
| Answer» B. higher octane number gasoline. | |
| 307. |
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 | |
| 308. |
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 | |
| 309. |
Illuminating characteristics of kerosene is expressed by its |
| A. | smoke point |
| B. | aniline point |
| C. | luminosity number |
| D. | aromatic content |
| Answer» D. aromatic content | |
| 310. |
Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic |
| A. | cracking |
| B. | polymerisation |
| C. | reforming |
| D. | isomerisation |
| Answer» D. isomerisation | |
| 311. |
Aniline point test of an oil qualitatively indicates the __________ content of an oil. |
| A. | paraffin |
| B. | olefin |
| C. | aromatic |
| D. | naphthene |
| Answer» D. naphthene | |
| 312. |
The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol. |
| A. | 3 |
| B. | 300 |
| C. | 3000 |
| D. | 1000 |
| Answer» B. 300 | |
| 313. |
A good lubricant should have high |
| A. | viscosity index |
| B. | volatility |
| C. | pour point |
| D. | none of these |
| Answer» B. volatility | |
| 314. |
Operating condition in the electrical dehydrators for crude oil is about |
| A. | 6.5 kgf/Cm2 & 95°C. |
| B. | 1 atm. & 110 °C. |
| C. | 20 kgf/cm2 & 110°C. |
| D. | 50 atm. and 150°C. |
| Answer» B. 1 atm. & 110 ¬∞C. | |
| 315. |
Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is __________ centistokes (or 100 Redwood I seconds). |
| A. | 5 |
| B. | 25 |
| C. | 50 |
| D. | 100 |
| Answer» C. 50 | |
| 316. |
Which of the following constituents present in petroleum is responsible for ash formation? |
| A. | Nitrogen compounds |
| B. | Organometallic compounds |
| C. | Sulphur compounds |
| D. | Oxygen compounds |
| Answer» D. Oxygen compounds | |
| 317. |
__________ treatment is done for appreciable improvement in viscosity index of lubricating oil. |
| A. | Acid |
| B. | Solvent extraction |
| C. | Alkali |
| D. | Clay |
| Answer» C. Alkali | |
| 318. |
Which of the following has the lowest viscosity (at a given temperature) of all? |
| A. | Naphtha |
| B. | Kerosene |
| C. | Diesel |
| D. | Lube oil |
| Answer» B. Kerosene | |
| 319. |
The proper arrangement of the petroleum fractions in order of their boiling points is |
| A. | lubricating oil > diesel > petrol > LPG |
| B. | lubricating oil > petrol > diesel > LPG |
| C. | petrol > lubricating oil > diesel > LPG |
| D. | petrol > diesel > LPG > lubricating oil |
| Answer» B. lubricating oil > petrol > diesel > LPG | |
| 320. |
__________ 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 | |
| 321. |
A typical yield of diesel in straight run distillation of crude oil may be about __________ percent. |
| A. | 8 |
| B. | 18 |
| C. | 28 |
| D. | 35 |
| Answer» B. 18 | |
| 322. |
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 | |
| 323. |
Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is |
| A. | more than 100 |
| B. | round about 100 |
| C. | between 50 and 100 |
| D. | less than 25 |
| Answer» B. round about 100 | |
| 324. |
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 | |
| 325. |
Crude topping column operates at __________ pressure. |
| A. | atmospheric |
| B. | 10 atm |
| C. | vacuum |
| D. | 3 atm. |
| Answer» B. 10 atm | |
| 326. |
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 | |
| 327. |
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. | |
| 328. |
The octane number of aviation gasoline may be |
| A. | 79 |
| B. | 87 |
| C. | 97 |
| D. | >100 |
| Answer» E. | |
| 329. |
In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones. |
| A. | sulphur increases |
| B. | sulphur decreases |
| C. | nitrogen decreases |
| D. | none of these |
| Answer» B. sulphur decreases | |
| 330. |
In sweetening process, solutizer agent used with caustic alkali is |
| A. | potassium isobutyrate |
| B. | sodium plumbite |
| C. | methanol |
| D. | phenol |
| Answer» B. sodium plumbite | |
| 331. |
In catalytic cracking process, olefins crack __________ times faster than in thermal cracking process. |
| A. | 100 |
| B. | 200-300 |
| C. | 1000-10000 |
| D. | 10 |
| Answer» D. 10 | |
| 332. |
For gasoline, the flash point ( |
| A. | Abel apparatus. |
| B. | Pensky-Marten's apparatus. |
| C. | Saybolt chromometer. |
| D. | none of these. |
| Answer» E. | |
| 333. |
Octane number of n-heptane is assumed to be |
| A. | 100 |
| B. | 0 |
| C. | 70 |
| D. | ‚àû |
| Answer» C. 70 | |
| 334. |
Choose the correct statement. |
| A. | Octane number of i-octane is zero. |
| B. | Octane number of paraffins increases with increasing number of carbon atoms. |
| C. | Branched chain paraffins have higher octane number than straight chain paraffins with same number of carbon atoms. |
| D. | The aromatics have lower octane number than naphthenes with same number of carbon atoms. |
| Answer» D. The aromatics have lower octane number than naphthenes with same number of carbon atoms. | |
| 335. |
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. | |
| 336. |
The coking process normally mostly used in Indian oil refineries is the __________ coking process. |
| A. | delayed |
| B. | flexi |
| C. | fluid |
| D. | contact |
| Answer» B. flexi | |
| 337. |
Octane number (unleaded) of gasoline produced by isomerisation of butane may be about |
| A. | 45 |
| B. | 55 |
| C. | 70 |
| D. | 90 |
| Answer» D. 90 | |
| 338. |
__________ converts n-paraffins to i-paraffins. |
| A. | Alkylation |
| B. | Polymerisation |
| C. | Isomerisation |
| D. | none of these |
| Answer» D. none of these | |
| 339. |
Performance number of a liquid fuel is related to its |
| A. | wax content |
| B. | spontaneous ignition temperature |
| C. | knocking tendency |
| D. | sulphur content |
| Answer» C. knocking tendency | |
| 340. |
Which is almost absent in crude petroleum? |
| A. | Olefins |
| B. | Mercaptans |
| C. | Naphthenes |
| D. | Cycloparaffins |
| Answer» C. Naphthenes | |
| 341. |
Pyrolysis of kerosene or natural gasoline is done to produce mainly the |
| A. | olefins and aromatics |
| B. | lighter paraffins |
| C. | stabilised gasoline |
| D. | diesel |
| Answer» B. lighter paraffins | |
| 342. |
Operating temperature and pressure in catalytic reforming is about |
| A. | 1-5 Kgf/cm2 & 200°C. |
| B. | 15-45 Kgf/cm2 & 450-550°C. |
| C. | 50 - 75 kgf/cm2 & 600 - 800°C. |
| D. | 5-10 kgf/cm2 & 150 - 250°C. |
| Answer» C. 50 - 75 kgf/cm2 & 600 - 800¬∞C. | |
| 343. |
Cetane number of diesel used in trucks may be about |
| A. | 50 |
| B. | 14 |
| C. | 35 |
| D. | 85 |
| Answer» B. 14 | |
| 344. |
Crude oil is pumped by a __________ pump. |
| A. | gear |
| B. | centrifugal |
| C. | screw |
| D. | reciprocating |
| Answer» C. screw | |
| 345. |
The main aim of cracking is to produce |
| A. | gasoline |
| B. | lube oil |
| C. | petrolatum |
| D. | coke |
| Answer» B. lube oil | |
| 346. |
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. | |
| 347. |
Which of the following is the easiest to crack? |
| A. | Paraffins |
| B. | Olefins |
| C. | Naphthenes |
| D. | Aromatics |
| Answer» B. Olefins | |
| 348. |
Flash point of motor gasoline may be around __________ °C. |
| A. | 10 |
| B. | 45 |
| C. | 100 |
| D. | 150 |
| Answer» C. 100 | |
| 349. |
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 | |
| 350. |
Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatisation by liquid SO2 extraction (Edeleanu process), its smoke point may become __________ mm. |
| A. | 5 |
| B. | 10 |
| C. | 25 |
| D. | 100 |
| Answer» D. 100 | |