MCQOPTIONS
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MCQOPTIONS
This section includes 408 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. |
Coking time in a commercial high temperature coal carbonisation plant is about ______________ hours? |
| A. | 6 |
| B. | 18 |
| C. | 28 |
| D. | 36 |
| Answer» C. 28 | |
| 302. |
Coking coals are invariably____________________? |
| A. | Lignites |
| B. | Bituminous coals |
| C. | Semi-anthracites |
| D. | Anthracites |
| Answer» C. Semi-anthracites | |
| 303. |
Coke oven gas is stripped of its H2S and mercaptans content by_________________? |
| A. | Absorption in wash oil |
| B. | Adsorption on bog iron bed |
| C. | Bubbling it through dilute sulphuric acid |
| D. | Adsorption on silica gel |
| Answer» C. Bubbling it through dilute sulphuric acid | |
| 304. |
Coke ovens in steel plant are heated by ___________________? |
| A. | Electricity |
| B. | Coke oven gas |
| C. | Mixed gas |
| D. | Both B. & C. |
| Answer» E. | |
| 305. |
Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has_________________? |
| A. | Higher calorific value |
| B. | Lower hydrogen content |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» E. | |
| 306. |
Coke oven gas is a better fuel than blast furnace gas, because of its higher________________? |
| A. | Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity) |
| B. | Adiabatic flame temperature |
| C. | Heat release rate (thus requiring smaller combustion chamber) |
| D. | All A., B. and C. |
| Answer» E. | |
| 307. |
Coke oven gas constitutes mainly of ____________________? |
| A. | H2 & CO |
| B. | H2 & CH4 |
| C. | CH4 & CO |
| D. | H2 & CO2 |
| Answer» C. CH4 & CO | |
| 308. |
Coke oven gas compared to blast furnace gas is________________? |
| A. | More explosive and inflammable |
| B. | Less poisonous |
| C. | Lighter |
| D. | All A., B. and C. |
| Answer» E. | |
| 309. |
Coke oven gas burns with a yellowish flame, because of the presence of __________________? |
| A. | CO2 |
| B. | CH4 |
| C. | H2 |
| D. | NH3 |
| Answer» C. H2 | |
| 310. |
Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the_______________? |
| A. | Hot scarfing of steel slabs |
| B. | Mixing with blast furnace gas |
| C. | Coke oven battery heating |
| D. | Steel ladle drying |
| Answer» D. Steel ladle drying | |
| 311. |
Coke made in narrower by-product coke ovens (as compared to wider ovens) is _____________________? |
| A. | Less reactive |
| B. | Stronger |
| C. | Smaller in size |
| D. | All A., B. & C. |
| Answer» E. | |
| 312. |
Coke having higher porosity has ___________________? |
| A. | Lower bulk density |
| B. | Lower strength |
| C. | Higher reactivity |
| D. | All A., B. and C. |
| Answer» E. | |
| 313. |
Coke compared to the coal from which it has been made, contains ____________________? |
| A. | Less volatile matter |
| B. | More carbon |
| C. | Greater percentage of ash |
| D. | All A., B. and C. |
| Answer» E. | |
| 314. |
Coals used for the generation of producer gas should have ____________________? |
| A. | High caking index |
| B. | Low fusion point of ash |
| C. | High volatile matter content |
| D. | Very low ash content (8-10%) |
| Answer» D. Very low ash content (8-10%) | |
| 315. |
Coal tar (produced by high temperature carbonisation) is the main source of_________________? |
| A. | Aromatic compounds |
| B. | Aliphatic compounds |
| C. | Paraffins |
| D. | Olefins |
| Answer» B. Aliphatic compounds | |
| 316. |
Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher __________________? |
| A. | Calorific value |
| B. | Higher C/H ratio |
| C. | Sulphur content |
| D. | Difference in gross & net calorific value |
| Answer» C. Sulphur content | |
| 317. |
Coalification means the ___________________? |
| A. | Process of conversion of lignite into anthracite |
| B. | Underground gasification of coal |
| C. | Complete combustion of coal |
| D. | Direct hydrogenation of coal |
| Answer» B. Underground gasification of coal | |
| 318. |
Coal tar fuel – 200 (CTF 200) is a mixture of __________________? |
| A. | Pitch and creosote oil |
| B. | Light oil and pitch |
| C. | Anthracene and crecosote oil |
| D. | Solar oil and pitch |
| Answer» B. Light oil and pitch | |
| 319. |
Coal is heated in presence of air to a temperature of about _______________ °C, while determining its ash content for proximate analysis? |
| A. | 500 |
| B. | 750 |
| C. | 950 |
| D. | 1100 |
| Answer» C. 950 | |
| 320. |
Coal is pulverised before burning in large capacity boiler furnaces mainly to____________________ |
| A. | Ensure its complete combustion |
| B. | Facilitate easy ash removal |
| C. | Enhance its calorific value |
| D. | Provide trouble free operation |
| Answer» B. Facilitate easy ash removal | |
| 321. |
Coal is heated in absence of air for 7 minutes at a temperature of about ______________ °C, during its volatile matter determination for proximate analysis? |
| A. | 550 |
| B. | 750 |
| C. | 950 |
| D. | 1150 |
| Answer» D. 1150 | |
| 322. |
Coal containing large quantity of _______________ are difficult to wash? |
| A. | Ash |
| B. | Inherent mineral matter |
| C. | Free impurities |
| D. | Volatile matter |
| Answer» C. Free impurities | |
| 323. |
C/H ratio is the minimum in case of_________________? |
| A. | Furnace oil |
| B. | Natural gas |
| C. | Coal |
| D. | Naphtha |
| Answer» C. Coal | |
| 324. |
C/H ratio is the maximum in case of_________________? |
| A. | Coal |
| B. | Furnace oil |
| C. | Natural gas |
| D. | Naphtha |
| Answer» B. Furnace oil | |
| 325. |
Catalyst used in Fischer-Tropsch process is_______________? |
| A. | Nickel |
| B. | Zinc oxide |
| C. | Alumina |
| D. | Thorium oxide |
| Answer» B. Zinc oxide | |
| 326. |
Carbon Content by weight in air dried wood may be about _______________ percent? |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 80 |
| Answer» D. 80 | |
| 327. |
Cannel coal and boghead coal are the examples of _________________? |
| A. | Humic coals |
| B. | Liptobiolites |
| C. | Sapropelic coals |
| D. | None of these |
| Answer» D. None of these | |
| 328. |
Cannel coal__________________? |
| A. | Is non-coking |
| B. | Has a high volatile matter content and burns with a luminous smoky flame |
| C. | Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named |
| D. | All A., B. and C. |
| Answer» E. | |
| 329. |
Calorific value of ____________________? |
| A. | Light paraffinic fuel oils is equal to that of equivalent olefins |
| B. | n-paraffin is lower than that of iso-paraffins of the same compounds |
| C. | Light paraffinic fuel oils is higher than that of equivalent olefins |
| D. | Light paraffinic fuel oils is lower than that of equivalent olefins |
| Answer» D. Light paraffinic fuel oils is lower than that of equivalent olefins | |
| 330. |
Calorific value of wood gas is about ______________ kcal/Nm3? |
| A. | 1500 |
| B. | 3300 |
| C. | 5400 |
| D. | 8500 |
| Answer» C. 5400 | |
| 331. |
Calorific values of both the solid as well as the liquid fuels can be determined by ______________ calorimeter? |
| A. | Bomb |
| B. | Boy’s |
| C. | Junkers |
| D. | None of these |
| Answer» B. Boy’s | |
| 332. |
Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about________________? |
| A. | 8800 kcal/m3 |
| B. | 8800 kcal/kg |
| C. | Same as that of coal middling |
| D. | 25000 kcal/kg |
| Answer» C. Same as that of coal middling | |
| 333. |
Calorific value of gobar gas (containing CH4 = 60% , H2 = 10% ; CO2 = 30%) may be about ______________ Kcal/Nm3? |
| A. | 1,800 |
| B. | 3,200 |
| C. | 5,400 |
| D. | 10,200 |
| Answer» D. 10,200 | |
| 334. |
Calorific value of tar is about _____________ Kcal/kg? |
| A. | 8800 |
| B. | 12000 |
| C. | 14000 |
| D. | 16000 |
| Answer» B. 12000 | |
| 335. |
Calorific value of dry wood may be around ______________ Kcal/kg? |
| A. | 5 |
| B. | 50 |
| C. | 500 |
| D. | 5000 |
| Answer» B. 50 | |
| 336. |
Calorific value of furnace oil is about _______________ Kcal/kg? |
| A. | 10,000 |
| B. | 15,000 |
| C. | 5,000 |
| D. | 20,000 |
| Answer» B. 15,000 | |
| 337. |
Calorific value of coke oven gas is around ______________ Kcal/Nm3? |
| A. | 900 |
| B. | 4200 |
| C. | 7500 |
| D. | 2000 |
| Answer» C. 7500 | |
| 338. |
Calorific value of coal middling generated in coal washeries during washing of coal may be around _____________ Kcal/kg? |
| A. | 1000 |
| B. | 4000 |
| C. | 6000 |
| D. | 8000 |
| Answer» C. 6000 | |
| 339. |
Calorific value of coke even gas produced by low temperature carbonisation of coal is about ____________ Kcal/Nm3? |
| A. | 4000 |
| B. | 2500 |
| C. | 6500 |
| D. | 10000 |
| Answer» D. 10000 | |
| 340. |
Calorific value of blast furnace gas is around _____________ KCal/Nm3? |
| A. | 850 |
| B. | 1800 |
| C. | 4200 |
| D. | 6500 |
| Answer» B. 1800 | |
| 341. |
Calorific value of bituminous coal may be around ______________ Kcal/kg? |
| A. | 500 |
| B. | 1500 |
| C. | 6500 |
| D. | 20000 |
| Answer» D. 20000 | |
| 342. |
Calorific value of both the solid & liquid fuels can be determined by using ______________ calorimeter? |
| A. | Junker’s |
| B. | Bomb |
| C. | Boy’s |
| D. | None of these |
| Answer» C. Boy’s | |
| 343. |
Calorific value as determined by bomb calorimeter is the__________________? |
| A. | Higher calorific value at constant volume |
| B. | Gross calorific value at constant pressure |
| C. | Lower calorific value at constant pressure |
| D. | Net calorific value at constant volume |
| Answer» B. Gross calorific value at constant pressure | |
| 344. |
Calorific value of a typical dry anthracite coal may be around _____________ Kcal/kg? |
| A. | 1000 |
| B. | 4000 |
| C. | 8000 |
| D. | 15000 |
| Answer» D. 15000 | |
| 345. |
Caking index of the coal blend used for the manufacture of metallurgical coke should be around__________________? |
| A. | 5 |
| B. | 21 |
| C. | 40 |
| D. | 48 |
| Answer» C. 40 | |
| 346. |
Caking index of a coal is a measure of its _______________________? |
| A. | Abradability |
| B. | Reactivity |
| C. | Agglutinating (binding) properties |
| D. | Porosity |
| Answer» D. Porosity | |
| 347. |
Caking index of coal blend used for blast furnace coke making is about_________________? |
| A. | 8 |
| B. | 12 |
| C. | 22 |
| D. | 36 |
| Answer» D. 36 | |
| 348. |
Caking coal is desirable for_________________? |
| A. | Burning on travelling grate |
| B. | Coke making |
| C. | Burning on firebars |
| D. | All A., B. and C. |
| Answer» C. Burning on firebars | |
| 349. |
By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of_______________? |
| A. | Tar |
| B. | Benzol |
| C. | Ammonia |
| D. | None of these |
| Answer» D. None of these | |
| 350. |
By-products are _____________ recovered in ‘Beehive ovens’ ? |
| A. | Fully |
| B. | Partially |
| C. | Not at all |
| D. | Negligibly |
| Answer» D. Negligibly | |