MCQOPTIONS
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MCQOPTIONS
This section includes 1037 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. |
__A metallic alloy in which one of the constituent metal is __________ , is called an amalgam.__ |
| A. | Zinc |
| B. | Mercury |
| C. | Lead |
| D. | Tin |
| Answer» C. Lead | |
| 352. |
__Polymerisation reactor used for the production of styrene butadiene rubber (SBR) is made of__ |
| A. | Cast iron |
| B. | Stainless steel or glass lined vessel |
| C. | Karbate |
| D. | Wrought iron |
| Answer» C. Karbate | |
| 353. |
__Duralumin is an alloy of__ |
| A. | Aluminium, copper and manganese |
| B. | Aluminium, nickel and silicon |
| C. | Aluminium and nickel |
| D. | None of these |
| Answer» B. Aluminium, nickel and silicon | |
| 354. |
__Evaporators used in caustic soda recovery and production plant are made of__ |
| A. | Monel metal |
| B. | Gun metal |
| C. | Wood metal |
| D. | Babbit metal |
| Answer» B. Gun metal | |
| 355. |
__DDT is shipped in__ |
| A. | Stainless steel containers |
| B. | Paper bags |
| C. | Fibre drums |
| D. | Either B or C |
| Answer» E. | |
| 356. |
__An alloy of iron containing 4% carbon is called__ |
| A. | High carbon steel |
| B. | Wrought iron |
| C. | Mild steel |
| D. | None of these |
| Answer» E. | |
| 357. |
__Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and__ |
| A. | Moving mercury and graphite |
| B. | Graphite and moving mercury |
| C. | Moving mercury and carbon |
| D. | Moving mercury and crimped steel wire |
| Answer» C. Moving mercury and carbon | |
| 358. |
__Alinco, which is a aluminium-cobalt-nickel steel, is used for making__ |
| A. | Surgical instruments |
| B. | Powerful magnets |
| C. | Chemical equipments |
| D. | Boiler tubes |
| Answer» C. Chemical equipments | |
| 359. |
__Which of the following is not used as the ceramic material in 'cermets'?__ |
| A. | Silicides |
| B. | Oxides |
| C. | Carbides |
| D. | Nitrides |
| Answer» E. | |
| 360. |
__Mercury is transported in metal containers made of__ |
| A. | Aluminium |
| B. | Iron |
| C. | Lead |
| D. | Nickel |
| Answer» C. Lead | |
| 361. |
__Which one occupies the lowermost position in the electromotive series of metals?__ |
| A. | Aluminium |
| B. | Noble metals (Ag, Pt, Au) |
| C. | Zinc |
| D. | Alkali metals (K, Na, Li) |
| Answer» C. Zinc | |
| 362. |
__Spark plugs, ignition tubes and electrodes are made of nickel __________ alloys.__ |
| A. | Beryllium |
| B. | Manganese |
| C. | Copper |
| D. | Iron |
| Answer» C. Copper | |
| 363. |
__Which of the following has a very high carbide forming tendency in steels?__ |
| A. | Silicon |
| B. | Chromium |
| C. | Nickel |
| D. | Vanadium |
| Answer» E. | |
| 364. |
__Cast iron compared to steel is better in__ |
| A. | Ductility |
| B. | Fluidity & castability |
| C. | Strength |
| D. | Malleability |
| Answer» C. Strength | |
| 365. |
__The softest material just next to talc in the Mho's scale is__ |
| A. | Quartz |
| B. | Gypsum |
| C. | Feldspar |
| D. | Fluorite |
| Answer» C. Feldspar | |
| 366. |
__Alpha iron is stable __________ °C.__ |
| A. | Above 1403 |
| B. | Upto 910 |
| C. | Above 1800 |
| D. | Between 910 & 1403 |
| Answer» C. Above 1800 | |
| 367. |
__Platinum and silver are corroded by__ |
| A. | Caustic soda solution |
| B. | Phosphoric acid |
| C. | Sulphuric acid (10%) |
| D. | None of these |
| Answer» E. | |
| 368. |
__Which of the following is the most elastic material?__ |
| A. | Plastic |
| B. | Glass |
| C. | Steel |
| D. | Rubber |
| Answer» D. Rubber | |
| 369. |
____________ is added in stainless steel to prevent inter crystal corrosion.__ |
| A. | Vanadium |
| B. | Niobium |
| C. | Chromium |
| D. | Nickel |
| Answer» C. Chromium | |
| 370. |
__To improve the machinability of steel, it is generally subjected to__ |
| A. | Spheroidising |
| B. | Tempering |
| C. | Normalising |
| D. | Annealing |
| Answer» B. Tempering | |
| 371. |
__Interchain forces are the weakest in case of__ |
| A. | Plastics |
| B. | Fibres |
| C. | Elastomers |
| D. | Both rubber & elastomers |
| Answer» E. | |
| 372. |
__Wood is corroded by__ |
| A. | Hydrochloric acid |
| B. | SO‚ÇÇ (dry or wet) |
| C. | Chlorine (dry or wet) |
| D. | All of the above |
| Answer» E. | |
| 373. |
__All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain__ |
| A. | Increases very quickly |
| B. | Decreases very quickly |
| C. | Increases in proportion to stress |
| D. | Decreases in proportion to stress |
| Answer» B. Decreases very quickly | |
| 374. |
__An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called__ |
| A. | Constantan |
| B. | Kanthal |
| C. | Chromel |
| D. | German silver |
| Answer» B. Kanthal | |
| 375. |
__Brine (15% concentration) can be stored in a vessel made of__ |
| A. | Monel |
| B. | Karbate |
| C. | Cast iron |
| D. | None of these |
| Answer» B. Karbate | |
| 376. |
__Which of the following metals in not used for coating of the base metal to guard it against corrosion?__ |
| A. | Lead |
| B. | Cadmium |
| C. | Magnesium |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 377. |
__Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of __________ as mercury does not amalgamate with it.__ |
| A. | Copper |
| B. | Copper alloys |
| C. | Stainless steel |
| D. | Monel |
| Answer» D. Monel | |
| 378. |
__Coke oven walls are lined with __________ bricks.__ |
| A. | Silica |
| B. | Tar-dolomite |
| C. | Low thermal conductivity |
| D. | Fire clay |
| Answer» B. Tar-dolomite | |
| 379. |
____________ is not a case hardening process.__ |
| A. | Carburising |
| B. | Nitriding |
| C. | Cyaniding |
| D. | Annealing |
| Answer» E. | |
| 380. |
__Percentage of silver in German silver is__ |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 0 |
| Answer» E. | |
| 381. |
__To improve the machinability of steel by its softening, it is subjected to__ |
| A. | Cold working |
| B. | Annealing |
| C. | Shot blasting |
| D. | Heating |
| Answer» C. Shot blasting | |
| 382. |
__High speed steel tools retain their hardness upto a temperature of __________ °C.__ |
| A. | 500 |
| B. | 750 |
| C. | 900 |
| D. | 1100 |
| Answer» D. 1100 | |
| 383. |
__Iron alloyed with carbon upto 2% is called__ |
| A. | Pig iron |
| B. | Wrought iron |
| C. | High carbon steel |
| D. | None of these |
| Answer» E. | |
| 384. |
_Presence of 0.3 to 0.5% arsenic in copper increases its$? |
| A. | Ductility |
| B. | Malleability |
| C. | Tenacity & hardness |
| D. | Electrical conductivity |
| Answer» D. Electrical conductivity | |
| 385. |
_Concrete tank can be used to store$? |
| A. | Alum |
| B. | Ferrous sulphate |
| C. | Sulphuric acid |
| D. | Saturated brine |
| Answer» E. | |
| 386. |
_Steel rods are used in reinforced concrete to increase its __________ strength.$? |
| A. | Shear |
| B. | Tensile |
| C. | Compressive |
| D. | None of these |
| Answer» C. Compressive | |
| 387. |
_Heavy duty bearings are usually made of$? |
| A. | White metal |
| B. | Phosphorous bronze |
| C. | Monel |
| D. | Zinc |
| Answer» B. Phosphorous bronze | |
| 388. |
_Thermosetting polymers are$? |
| A. | Injection moulded |
| B. | Cast molded |
| C. | Extruded |
| D. | None of these |
| Answer» C. Extruded | |
| 389. |
_Electronic structure of a material is generally studied by$? |
| A. | Metallurgical microscope |
| B. | Electron diffraction |
| C. | Spectroscopic techniques |
| D. | X-ray |
| Answer» D. X-ray | |
| 390. |
_Carbon supply in pack carburising process is in the form of$? |
| A. | Charcoal |
| B. | Calcium carbide |
| C. | Hydrocarbon oil |
| D. | Graphite |
| Answer» B. Calcium carbide | |
| 391. |
_As the impurities are oxidised, the melting point of iron$? |
| A. | Decreases |
| B. | Remains unchanged |
| C. | Increases |
| D. | May increase or decrease ; unpredictable |
| Answer» D. May increase or decrease ; unpredictable | |
| 392. |
_Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system?$? |
| A. | High silicon iron, silicon rubber, Kel-F and teflon |
| B. | Mild steel and stainless steel |
| C. | Cast iron, tin and aluminium |
| D. | Copper, nickel and monel |
| Answer» B. Mild steel and stainless steel | |
| 393. |
_Maximum carbon content in cast iron is __________ percent.$? |
| A. | 3.8 |
| B. | 5.2 |
| C. | 4.8 |
| D. | 4.3 |
| Answer» E. | |
| 394. |
_Mild steel is a/an __________ steel.$? |
| A. | Low carbon |
| B. | Medium carbon |
| C. | High carbon |
| D. | High alloy |
| Answer» B. Medium carbon | |
| 395. |
_Cast iron detachable joint is used in __________ pipes.$? |
| A. | Steel |
| B. | Cast iron |
| C. | Asbestos cement |
| D. | Reinforced cement concrete |
| Answer» B. Cast iron | |
| 396. |
_Carbon is present in steel wholly in the$? |
| A. | Combined form |
| B. | Free state as graphite |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» B. Free state as graphite | |
| 397. |
_Liquid ammonia is shipped in __________ containers.$? |
| A. | Steel |
| B. | Aluminium |
| C. | Glass |
| D. | Lead lined |
| Answer» D. Lead lined | |
| 398. |
_The material of construction of bearings is$? |
| A. | Cast iron |
| B. | Babbit metal |
| C. | Pig iron |
| D. | Steel |
| Answer» C. Pig iron | |
| 399. |
_The process of coating steel sheets by zinc to improve its corrosion resistance is called$? |
| A. | Calorising |
| B. | Galvanising |
| C. | Zincification |
| D. | Tempering |
| Answer» C. Zincification | |
| 400. |
_For platinum thermocouples, lead wires are made of$? |
| A. | Copper & copper-nickel alloys |
| B. | Copper & iron |
| C. | Iron & nickel |
| D. | Tin & nickel |
| Answer» B. Copper & iron | |