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.
| 151. |
Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in_____________________? |
| A. | KOH |
| B. | Ammoniacal cuprous chloride |
| C. | Pyrogallol solution |
| D. | None of these |
| Answer» E. | |
| 152. |
Nitrogen in coal_________________? |
| A. | Is present upto 1-2% |
| B. | Comes from protein in parent vegetable matter |
| C. | Is recovered as ammonia during its carbonisation |
| D. | All A., B. and C. |
| Answer» E. | |
| 153. |
Net calorific value is the gross calorific value less the _______________ heat of water in the product of combustion when cooled to 15°C ? |
| A. | Sensible |
| B. | Latent |
| C. | Sensible and latent |
| D. | None of these |
| Answer» D. None of these | |
| 154. |
Natural draught produced by a chimney depends upon the _____________________? |
| A. | Density of the chimney gases |
| B. | Height of the chimney |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 155. |
Natural draft created by the chimney depends upon _____________________? |
| A. | Temperature of the flue gas |
| B. | Its height |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 156. |
Narrow coke ovens as compared to wider coke ovens_________________? |
| A. | Produce smaller coke |
| B. | Produce stronger coke |
| C. | Require less time of carbonisation |
| D. | All A., B. and C. |
| Answer» E. | |
| 157. |
Naphthalene recovered from coke oven gas is used___________________? |
| A. | As moisture proof coating on fibres |
| B. | As moth balls (insecticides) |
| C. | As a fuel in furnaces |
| D. | For making electrodes |
| Answer» C. As a fuel in furnaces | |
| 158. |
Naphthalene is removed from coke oven gas by________________? |
| A. | Scrubbing with wash oil (a petroleum product) |
| B. | Adsorbing on bog iron bed |
| C. | Absorbing in vetro-coke solution |
| D. | None of these |
| Answer» B. Adsorbing on bog iron bed | |
| 159. |
Naphthalene is used for making_________________? |
| A. | Insecticides (e.g. moth balls) |
| B. | Unsaturated polyesters |
| C. | Drug intermediates e.g. β-naphthol |
| D. | All A., B. and C. |
| Answer» E. | |
| 160. |
Mott and Wheeler test is conducted on coke to find its _____________________? |
| A. | Reactivity with O2 |
| B. | Abradability |
| C. | Phosphorus content |
| D. | Volatile matter content |
| Answer» B. Abradability | |
| 161. |
Moisture loss is determined by the _______________________? |
| A. | Humidity of combustion air |
| B. | Moisture content of fuel |
| C. | Both A. and B. |
| D. | The water formed by combustion reaction |
| Answer» D. The water formed by combustion reaction | |
| 162. |
‘Mixed gas’ used in steel plants is a mixture of___________________? |
| A. | B.F. gas and coke oven gas |
| B. | Coke oven gas and converter gas |
| C. | Coke oven gas and L.P.G |
| D. | Blast furnace gas and naphtha vapor |
| Answer» B. Coke oven gas and converter gas | |
| 163. |
Mineral matter, ‘M’ and ash percentage ‘A’ in coal are roughly related as_______________? |
| A. | M = 1.8 A |
| B. | M = 0.5 A |
| C. | M = 1.1 A |
| D. | M = A |
| Answer» D. M = A | |
| 164. |
Mineral matter content (M) and ash content A. in coal are approximately related as _______________? |
| A. | M = 1.1A |
| B. | M = A |
| C. | M = 1.5A |
| D. | M = 2A |
| Answer» B. M = A | |
| 165. |
“Micum Index” of a coke is a measure of its___________________? |
| A. | Reactivity |
| B. | Porosity |
| C. | Bulk density |
| D. | Hardness & strength |
| Answer» E. | |
| 166. |
Method of maintaining fires in furnace during standby periods without undue consumption of fuel is called_________________? |
| A. | Back draughting |
| B. | Banking |
| C. | Under pressurising |
| D. | None of these |
| Answer» C. Under pressurising | |
| 167. |
Main use of soft coke is as _______________ fuel? |
| A. | Domestic |
| B. | Blast furnace |
| C. | Foundry |
| D. | None of these |
| Answer» B. Blast furnace | |
| 168. |
Main use of hard coke produced by high temperature carbonisation is in the ____________________ ? |
| A. | Iron blast furnace |
| B. | Cupola in foundries |
| C. | Sinter making |
| D. | Domestic ovens |
| Answer» B. Cupola in foundries | |
| 169. |
Main constituents of purified Lurgi gas are___________________? |
| A. | H2, CmHn & CO2 |
| B. | CO, H2 & CH4 |
| C. | CO2, O2 & CO |
| D. | N2, H2 & CO2 |
| Answer» C. CO2, O2 & CO | |
| 170. |
Main constituent of the gas produced from a gobar gas plant is___________________? |
| A. | CO2 |
| B. | CH4 |
| C. | H2 |
| D. | CO |
| Answer» C. H2 | |
| 171. |
Main constituents of Benzol are ____________________? |
| A. | Benzene, toluene & xylene |
| B. | Tar & creosote |
| C. | Ammonia & phenol |
| D. | Anthracene & phenol |
| Answer» B. Tar & creosote | |
| 172. |
Main constituent of natural gas is ________________? |
| A. | CH4 (upto 90%) |
| B. | C2H6 |
| C. | C3H8 |
| D. | H2 |
| Answer» B. C2H6 | |
| 173. |
Main component of sewage gas produced during anaerobic decomposition of organic waste (by suitable bacteria) during sewage disposal is __________________? |
| A. | H2 |
| B. | CH4 |
| C. | CO2 |
| D. | N2 |
| Answer» C. CO2 | |
| 174. |
Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces __________________? |
| A. | Higher amount of methane |
| B. | Lower amount of hydrogen |
| C. | Both A. and B. |
| D. | Higher amount of both methane and hydrogen |
| Answer» D. Higher amount of both methane and hydrogen | |
| 175. |
Lurgi coal gasifier is a pressurised ______________ bed reactor? |
| A. | Moving |
| B. | Fixed |
| C. | Fluidised |
| D. | Entrained |
| Answer» B. Fixed | |
| 176. |
Low temperature oxidation of coal resulting from bad storage conditions does not decrease its______________________? |
| A. | Caking power |
| B. | Calorific value |
| C. | Hydrogen content |
| D. | Oxygen content |
| Answer» E. | |
| 177. |
Low temperature oxidation of stored coal results in the________________? |
| A. | Decrease in its caking power & calorific value |
| B. | Decrease in its carbon & hydrogen content |
| C. | Increase in its oxygen content |
| D. | All A., B. and A. |
| Answer» E. | |
| 178. |
Low temperature oxidation of coal during storage does not decrease its__________________? |
| A. | Oxygen content |
| B. | Caking power |
| C. | Calorific value |
| D. | None of these |
| Answer» E. | |
| 179. |
Low temperature oxidation of coal is accelerated by the____________________? |
| A. | Storage in large heaps |
| B. | Storage in compressed piles |
| C. | Absence of porous or friable particles |
| D. | All A., B. and C. |
| Answer» B. Storage in compressed piles | |
| 180. |
Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if __________________? |
| A. | It contains large amount of volatile matter |
| B. | It is stored in tall heaps |
| C. | Smaller fines are stored in large quantity |
| D. | All A., B. and C. |
| Answer» E. | |
| 181. |
Low temperature carbonisation of coal takes place at ______________ °C? |
| A. | 300 |
| B. | 1100 |
| C. | 700 |
| D. | 150 |
| Answer» D. 150 | |
| 182. |
Low temperature carbonisation of coal produces_________________? |
| A. | Metallurgical coke |
| B. | Soft coke |
| C. | Very low calorific value coke oven gas |
| D. | No by-products |
| Answer» C. Very low calorific value coke oven gas | |
| 183. |
Lignite is ___________________? |
| A. | A high rank coal |
| B. | A coking coal |
| C. | Can be used for gasification and steam generation |
| D. | A black banded coal which burns with a non-smoky yellowish flame |
| Answer» D. A black banded coal which burns with a non-smoky yellowish flame | |
| 184. |
Light oil whose major component is Benzol, is obtained by the distillation of crude tar in the temperature range of _____________ °C? |
| A. | 80-170 |
| B. | 200-300 |
| C. | 250-270 |
| D. | 280-300 |
| Answer» B. 200-300 | |
| 185. |
L.D. converter gas (produced in steel plant) comprises mainly of ___________________? |
| A. | CO (upto 65%) & CO2 |
| B. | CO2 & H2 |
| C. | CO & O2 |
| D. | CO2 & O2 |
| Answer» B. CO2 & H2 | |
| 186. |
Largest constituent of coke oven gas is_________________? |
| A. | N2 |
| B. | H2 |
| C. | CH4 |
| D. | CO2 |
| Answer» C. CH4 | |
| 187. |
Largest constituent of blast furnace gas is__________________? |
| A. | N2 |
| B. | CO |
| C. | CO2 |
| D. | H2 |
| Answer» B. CO | |
| 188. |
Laboratory gas is obtained by the cracking of____________________? |
| A. | Gasoline |
| B. | Diesel |
| C. | Fuel oil |
| D. | Kerosene |
| Answer» E. | |
| 189. |
Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an ______________ bed gasifier? |
| A. | Entrained |
| B. | Moving |
| C. | Fixed |
| D. | Fluidised |
| Answer» B. Moving | |
| 190. |
KOH solution used in Orsat apparatus absorbs____________________? |
| A. | CO2 |
| B. | SO2 |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 191. |
Junker’s calorimeter is used to determine the calorific value of______________________? |
| A. | Pulverised coal |
| B. | Gaseous fuels |
| C. | Fuel oil |
| D. | None of these |
| Answer» C. Fuel oil | |
| 192. |
__________ is used as jet engine fuel ? |
| A. | Petrol |
| B. | Diesel |
| C. | Kerosene |
| D. | LPG |
| Answer» D. LPG | |
| 193. |
Ionisation potential applied across the electrodes of electrostatic tar precipitator is around_____________________? |
| A. | 230 V AC |
| B. | 60 KV AC |
| C. | 230 V DC |
| D. | 60 KV DC |
| Answer» E. | |
| 194. |
Insitu theory and drift theory are related to the____________________? |
| A. | Origin of petroleum oil |
| B. | Origin of coal |
| C. | Coalification |
| D. | Variation of coal quality with depth |
| Answer» C. Coalification | |
| 195. |
Initial pressure of oxygen introduced into the ‘bomb’ of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around _____________ atm? |
| A. | 3-5 |
| B. | 25-30 |
| C. | 60-65 |
| D. | 95-100 |
| Answer» C. 60-65 | |
| 196. |
Increase in ash content of blast furnace coke_________________? |
| A. | Reduces its consumption in the furnace |
| B. | Increases its consumption in the furnace |
| C. | Does not affect its consumption in the furnace |
| D. | Decreases its hardness and abrasion resistance |
| Answer» C. Does not affect its consumption in the furnace | |
| 197. |
Incomplete combustion of a fuel is characterised by the high _______________ in the flue gas? |
| A. | Smoke |
| B. | Temperature |
| C. | Oxygen |
| D. | Carbon monoxide |
| Answer» E. | |
| 198. |
Incomplete combustion of fuel in the furnace is judged by high _____________ of the flue gases? |
| A. | CO content |
| B. | Dew point |
| C. | CO2 content |
| D. | O2 content |
| Answer» B. Dew point | |
| 199. |
In Orsat’s apparatus, ammoniacal cuprous chloride is used for selectivity absorbing________________? |
| A. | CO |
| B. | CO2 |
| C. | O2 |
| D. | H2O |
| Answer» B. CO2 | |
| 200. |
In Lurgi coal gasifier___________________? |
| A. | Coking coals cannot be used |
| B. | Low carbon conversion efficiency is achieved |
| C. | Entrainment of solids is higher |
| D. | Larger quantity of coal can be processed |
| Answer» E. | |