MCQOPTIONS
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MCQOPTIONS
This section includes 1331 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. |
Hydrazine is used in water treatment for the removal of___________________? |
| A. | Colloidal impurities |
| B. | Dissolved oxygen |
| C. | Turbidity |
| D. | Chlorinous taste |
| Answer» C. Turbidity | |
| 352. |
Hydrazine is largely used____________________? |
| A. | As a starting material for ‘hypo’ |
| B. | In photographic industry |
| C. | As rocket fuel |
| D. | In printing industry |
| Answer» D. In printing industry | |
| 353. |
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln ? |
| A. | 500°C |
| B. | 750°C |
| C. | 1000°C |
| D. | 1500°C |
| Answer» D. 1500°C | |
| 354. |
Hollander beater used during paper pulp manufacture does not facilitate the ______________ of fiber? |
| A. | Cutting |
| B. | Fibrillation |
| C. | Hydration |
| D. | Strengthening |
| Answer» E. | |
| 355. |
‘Hollander beater’ machine used in the paper manufacturing plant does not accomplish the task of____________________? |
| A. | Final rolling out of paper |
| B. | Cutting of fibres |
| C. | Hydration of fibres |
| D. | Fibrillation of fibre |
| Answer» B. Cutting of fibres | |
| 356. |
Highly porous refractory bricks are ____________________? |
| A. | Less susceptible to chemical attack by molten fluxes and gases etc |
| B. | Very strong |
| C. | Having very high thermal conductivity |
| D. | None of these |
| Answer» E. | |
| 357. |
Higher viscosity index of a lubricating oil denotes_______________? |
| A. | Less changes in fluidity of oil with temperature |
| B. | Substantially high change in fluidity of oil with temperature |
| C. | Its unsuitability under varying temperature conditions |
| D. | None of these |
| Answer» B. Substantially high change in fluidity of oil with temperature | |
| 358. |
High temperature carbonisation of coal produces _____________________ ? |
| A. | Inferior coke compared to low temperature carbonisation |
| B. | Less of gases compared to liquid products |
| C. | Larger quantity of tar compared to low temperature carbonisation |
| D. | None of these |
| Answer» E. | |
| 359. |
High temperature carbonisation of coal takes place at __________________ °C? |
| A. | 2000 |
| B. | 700 |
| C. | 1100 |
| D. | < 500 |
| Answer» D. < 500 | |
| 360. |
High purity nitrogen is used in__________________? |
| A. | Making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils |
| B. | Fire fighting purposes |
| C. | Both A. & B. |
| D. | Neither A. nor (B) |
| Answer» D. Neither A. nor (B) | |
| 361. |
High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to__________________? |
| A. | Flocculate the impurities |
| B. | Facilitate fast filtration |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 362. |
High acid value of an oil or fat is an indication of _____________________? |
| A. | Storage under improper conditions |
| B. | Absence of unsaturation |
| C. | Its smaller molecular weight |
| D. | None of these |
| Answer» B. Absence of unsaturation | |
| 363. |
Helium is produced on commercial scale from__________________? |
| A. | Air |
| B. | Natural gas |
| C. | Coke oven gas |
| D. | None of these |
| Answer» C. Coke oven gas | |
| 364. |
Heating of _______________ to 120°C, produces plaster of paris ? |
| A. | Blue vitriol |
| B. | Gypsum |
| C. | Calcium silicate |
| D. | Calcium sulphate |
| Answer» C. Calcium silicate | |
| 365. |
Hard water____________________? |
| A. | Does not affect the lather formation by soap |
| B. | Is not unfit for drinking purpose |
| C. | Pollutes the water stream |
| D. | All A, B. and C |
| Answer» C. Pollutes the water stream | |
| 366. |
Haemoglobin is a/an____________________? |
| A. | Amino acid |
| B. | Biological catalyst |
| C. | Protein |
| D. | Enzyme |
| Answer» D. Enzyme | |
| 367. |
H2S is scrubbed from refinery gases by absorption using ________________________? |
| A. | Dilute H2SO4 |
| B. | Ethanol amine |
| C. | Chilled water |
| D. | Tri-butyl phosphate |
| Answer» C. Chilled water | |
| 368. |
Gypsum is chemically __________________ ? |
| A. | Calcium chloride |
| B. | Potassium sulphate |
| C. | Sodium sulphate |
| D. | Calcium sulphate |
| Answer» E. | |
| 369. |
Gun powder uses_____________________? |
| A. | Sulphur |
| B. | Charcoal |
| C. | Potassium nitrate |
| D. | All A , B, & C. |
| Answer» E. | |
| 370. |
Gun powder, which is an explosive comprises of charcoal, sulphur and____________________? |
| A. | Glycerine |
| B. | Salt petre |
| C. | Nitro glycerine |
| D. | Dynamite |
| Answer» C. Nitro glycerine | |
| 371. |
Grignard reagent is chemically known as ____________________? |
| A. | Ethyl magnesium chloride |
| B. | Methyl magnesium chloride |
| C. | Dichlorophenol |
| D. | Monochloroacetic acid |
| Answer» B. Methyl magnesium chloride | |
| 372. |
Graphite is a/an________________________? |
| A. | Electrical insulator |
| B. | Allotrope of carbon |
| C. | Moderator used in nuclear reactor |
| D. | Both B. and C. |
| Answer» E. | |
| 373. |
Good quality of edible salt is obtained from brine by the process of__________________? |
| A. | Solar evaporation |
| B. | Vacuum evaporation |
| C. | Freeze drying |
| D. | Electrolysis |
| Answer» C. Freeze drying | |
| 374. |
Glycerine is recovered from lye by ___________________? |
| A. | Evaporation followed by vacuum distillation |
| B. | Liquid extraction technique |
| C. | Extractive distillation technique |
| D. | None of these |
| Answer» B. Liquid extraction technique | |
| 375. |
Glycerine is not used in the____________________? |
| A. | Manufacture of explosive |
| B. | Conditioning and humidification of tobacco |
| C. | Manufacture of pharmaceuticals |
| D. | None of these |
| Answer» E. | |
| 376. |
Glycerine is a by-product of the ________________ industry ? |
| A. | Soap |
| B. | Detergent |
| C. | Oil hydrogenation |
| D. | Paint |
| Answer» B. Detergent | |
| 377. |
Glycerine can be obtained from ________________ ? |
| A. | Fat |
| B. | Naphthalene |
| C. | Cumene |
| D. | Sucrose |
| Answer» B. Naphthalene | |
| 378. |
Glauber’s salt is chemically ? |
| A. | Calcium sulphate |
| B. | Potassium sulphate |
| C. | Potassium chlorate |
| D. | None of these |
| Answer» E. | |
| 379. |
Glauber’s salt is chemically represented by____________________? |
| A. | Na2SO4.10H2O |
| B. | CaCl(OCl) |
| C. | CaSO4.H2O |
| D. | (NH4)2SO4 |
| Answer» B. CaCl(OCl) | |
| 380. |
Glass is__________________? |
| A. | Mainly CaO |
| B. | Subjected to galvanising |
| C. | A super cooled liquid |
| D. | All A , B. and C. |
| Answer» D. All A , B. and C. | |
| 381. |
___________________ glass is used for the manufacture of optical glass ? |
| A. | Pyrex |
| B. | Soda |
| C. | Flint |
| D. | Crooke’s |
| Answer» D. Crooke’s | |
| 382. |
______________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant ? |
| A. | Pyrex |
| B. | Soda lime |
| C. | Lead |
| D. | High silica |
| Answer» B. Soda lime | |
| 383. |
Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of_________________? |
| A. | Collagen |
| B. | Tannin |
| C. | Molasses |
| D. | Carbohydrate |
| Answer» B. Tannin | |
| 384. |
Fusion of limestone and ______________ produces high alumina cement? |
| A. | Sand |
| B. | Bauxite |
| C. | Quicklime |
| D. | Calcite |
| Answer» C. Quicklime | |
| 385. |
Fusion of bauxite and ________________ produces high alumina cement? |
| A. | Alum |
| B. | Limestone |
| C. | Coke |
| D. | Quartz |
| Answer» C. Coke | |
| 386. |
Fusel oil is a/an_________________? |
| A. | Essential oil |
| B. | Extract from medicinal herbs |
| C. | Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses) |
| D. | None of these |
| Answer» D. None of these | |
| 387. |
Function of thinner in a paint is to ______________________ ? |
| A. | Accelerate the oxidation of oil |
| B. | Prevent gelling of the paint |
| C. | Suspend pigments & dissolve film forming materials |
| D. | Form a protective film |
| Answer» D. Form a protective film | |
| 388. |
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to______________? |
| A. | Brighten the faint images |
| B. | Remove metallic silver |
| C. | Convert silver chloride to silver |
| D. | Remove unexposed silver halide |
| Answer» E. | |
| 389. |
Fumigant insecticides___________________? |
| A. | Kill insects, when they eat it |
| B. | Emit poisonous vapour |
| C. | Are absorbed throughout the plant |
| D. | None of these |
| Answer» E. | |
| 390. |
Free alkali in a toilet soap is _______________ that in a laundry shop ? |
| A. | Less than |
| B. | More than |
| C. | Same |
| D. | None of these |
| Answer» B. More than | |
| 391. |
Frasch process is for______________________? |
| A. | Making oxygen |
| B. | Producing helium |
| C. | Mining sulphur |
| D. | Making nitrogen |
| Answer» D. Making nitrogen | |
| 392. |
Fourdrinier machine is used in the manufacture of ___________________? |
| A. | Sugar |
| B. | Paper |
| C. | Alcohol from molasses |
| D. | Phenol formaldehyde |
| Answer» C. Alcohol from molasses | |
| 393. |
Flux addition during smelting of ore is done to___________________? |
| A. | Remove impurities/gangue |
| B. | Enhance rate of reaction |
| C. | Accelerate reduction of ore |
| D. | Separate slag from metal |
| Answer» B. Enhance rate of reaction | |
| 394. |
Fluorescent dyes are added in detergents to__________________? |
| A. | Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics |
| B. | Attain distinctiveness from other brands |
| C. | Act as tarnish inhibitor for metals like German silver |
| D. | None of these |
| Answer» B. Attain distinctiveness from other brands | |
| 395. |
Flexible foam (for mattresses) is usually made of_____________________? |
| A. | PVC |
| B. | Silicone |
| C. | Polyurethanes |
| D. | Polyamides |
| Answer» D. Polyamides | |
| 396. |
Flash point of most vegetable oils is about _______________ °C ? |
| A. | 50 |
| B. | 100 |
| C. | 200 |
| D. | 300 |
| Answer» D. 300 | |
| 397. |
Fish contains about _______________ percent oil ? |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 35 |
| Answer» D. 35 | |
| 398. |
Finely ground calcium aluminate & silicate is a/an ____________________? |
| A. | Cermet |
| B. | Cement |
| C. | Abrasive |
| D. | Explosive |
| Answer» C. Abrasive | |
| 399. |
Fermentator temperature during production of alcohol from molasses is around ______________ °C? |
| A. | 5 |
| B. | 30 |
| C. | 130 |
| D. | 300 |
| Answer» C. 130 | |
| 400. |
Fermentation of molasses to produce ethyl alcohol is done at ________________ °C? |
| A. | 20 – 30 |
| B. | < – 5 |
| C. | 100 – 150 |
| D. | 250 – 300 |
| Answer» B. < – 5 | |