MCQOPTIONS
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MCQOPTIONS
This section includes 400 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
In the Contact process of sulphuric acid manufacture, 98% acid cooler is made of_____________________? |
| A. | Stainless steel |
| B. | Cast iron |
| C. | Lead lined steel |
| D. | Rubber lined steel |
| Answer» C. Lead lined steel | |
| 202. |
In SO3 absorber (Contact Process), packing material used is of________________? |
| A. | Cast iron |
| B. | Chemical stoneware |
| C. | Karbate |
| D. | Mild steel |
| Answer» C. Karbate | |
| 203. |
In order to be called steel, an alloy should have iron percentage greater than____________________? |
| A. | 80 |
| B. | 70 |
| C. | 90 |
| D. | 50 |
| Answer» B. 70 | |
| 204. |
In hot wire anemometer used for gas flow measurement, the wire is normally made of ______________________? |
| A. | Copper |
| B. | Platinum |
| C. | Constantan |
| D. | Chromium |
| Answer» C. Constantan | |
| 205. |
In drop forging process, the forging is done by dropping the _____________ at high velocity? |
| A. | Hammer |
| B. | Workpiece |
| C. | Die with hammer |
| D. | Weight on hammer |
| Answer» D. Weight on hammer | |
| 206. |
In cold working of metal as compared to its hot working____________________? |
| A. | Cracks and blow holes are eliminated |
| B. | Ductility and impact strength improves |
| C. | Appreciable strain hardening is produced |
| D. | Yield stress, hardness and fatigue strength is not at all affected |
| Answer» D. Yield stress, hardness and fatigue strength is not at all affected | |
| 207. |
In a plate type heat exchanger, heat transfer plates are never made of _________________? |
| A. | Stainless steel |
| B. | Cast iron |
| C. | Titanium |
| D. | Hastelloy C |
| Answer» C. Titanium | |
| 208. |
‘Hypersil’ is a ______________ steel? |
| A. | High speed |
| B. | Silicon |
| C. | Molybdenum |
| D. | Tungsten |
| Answer» C. Molybdenum | |
| 209. |
Hydrocyanic acid is not shipped in______________? |
| A. | Cast iron vessels |
| B. | Steel cylinders |
| C. | Aluminium containers |
| D. | Monel drums |
| Answer» B. Steel cylinders | |
| 210. |
Hydrochloric acid is stored in a ________________vessel? |
| A. | Lead lined steel |
| B. | Rubber lined steel |
| C. | Stainless steel |
| D. | Cast iron |
| Answer» C. Stainless steel | |
| 211. |
Hydrochloric acid is stored in a _____________ steel vessel? |
| A. | Lead lined |
| B. | Rubber lined |
| C. | Glass lined |
| D. | Stainless |
| Answer» C. Glass lined | |
| 212. |
Hydrochloric acid is _______________ corrosive to common metals? |
| A. | Least |
| B. | Not |
| C. | Mildly |
| D. | Highly |
| Answer» E. | |
| 213. |
Hydrochloric acid absorber in made of___________________? |
| A. | Cast iron |
| B. | Mild steel |
| C. | Karbate |
| D. | Stainless steel |
| Answer» D. Stainless steel | |
| 214. |
How many molecules per unit cell are there in a face centred cubic lattice ? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 215. |
Hot working of lead is carried out at_________________? |
| A. | 75° C |
| B. | 373° K |
| C. | 150° C |
| D. | Room temperature |
| Answer» E. | |
| 216. |
High speed steel tools retain their hardness upto a temperature of _____________ °C? |
| A. | 500 |
| B. | 750 |
| C. | 900 |
| D. | 1100 |
| Answer» D. 1100 | |
| 217. |
High speed steel should have high___________________? |
| A. | Toughness |
| B. | Wear resistance |
| C. | Hardenability |
| D. | Both B. & C. |
| Answer» E. | |
| 218. |
High speed cutting tool steels contain about _______________ percent of tungsten? |
| A. | 6-8 |
| B. | 18-20 |
| C. | 30-35 |
| D. | 50-55 |
| Answer» C. 30-35 | |
| 219. |
High degree of toughness is a must for__________________? |
| A. | High speed steel |
| B. | Shock resisting steel |
| C. | Cold work tool steel |
| D. | None of these |
| Answer» C. Cold work tool steel | |
| 220. |
High carbon steel contains more than _____________ percent carbon? |
| A. | 0.5 |
| B. | 2.2 |
| C. | 2.5 |
| D. | 2.8 |
| Answer» B. 2.2 | |
| 221. |
Heavy duty bearings are usually made of___________________? |
| A. | White metal |
| B. | Phosphorous bronze |
| C. | Monel |
| D. | Zinc |
| Answer» B. Phosphorous bronze | |
| 222. |
Hastelloy comprises of____________________? |
| A. | Copper and tin |
| B. | Copper and nickel |
| C. | Molybdenum and nickel |
| D. | Lead and tin |
| Answer» D. Lead and tin | |
| 223. |
Hastelloy C is a good material of construction in chemical process industry, since it is ___________________? |
| A. | Highly corrosion resistant and is readily fabricated |
| B. | Relatively inexpensive although it can be fabricated with some difficulty |
| C. | Corrosion resistant to most alkalis, particularly because of its copper content |
| D. | Light and resists attack by acids |
| Answer» E. | |
| 224. |
Hardest materials so far found is_________________? |
| A. | Diamond |
| B. | Graphite |
| C. | Carborundum |
| D. | Pumice stone |
| Answer» B. Graphite | |
| 225. |
Hardest material so far found is__________________? |
| A. | Diamond |
| B. | Graphite |
| C. | Carborundum |
| D. | Pumice stone |
| Answer» B. Graphite | |
| 226. |
Hardening of steel is not possible unless it is heated ______________ critical point? |
| A. | Above the highest |
| B. | Above the lowest |
| C. | Between the first & second |
| D. | Between the second & third |
| Answer» C. Between the first & second | |
| 227. |
Hardened steel is softened by___________________? |
| A. | Normalising |
| B. | Tempering |
| C. | Annealing |
| D. | Carburising |
| Answer» C. Annealing | |
| 228. |
Hammers and railway rails are normally made of___________________? |
| A. | Mild steel |
| B. | Dead mild steel |
| C. | Medium carbon steel |
| D. | High carbon steel |
| Answer» E. | |
| 229. |
H2SO4 (< 50% concentration) is corrosive to_________________? |
| A. | Aluminium, mild steel, stainless steel, concrete & tin |
| B. | Copper, cast iron & high silicon iron (14% Si) |
| C. | Rubber (butyl and hard), silicone rubber & Teflon |
| D. | Glass, graphite, porcelain & stoneware |
| Answer» B. Copper, cast iron & high silicon iron (14% Si) | |
| 230. |
Gunmetal and bronze are not corroded by the action of__________________? |
| A. | Wet chlorine |
| B. | Synthetic detergent solution |
| C. | Hydrochloric acid (10%) |
| D. | Nitric acid (< 25%) |
| Answer» C. Hydrochloric acid (10%) | |
| 231. |
Gun metal is an alloy of_________________________? |
| A. | Nickel, tin and copper |
| B. | Copper, tin and zinc |
| C. | Copper, phosphorus and nickel |
| D. | Manganese, phosphorus and nickel |
| Answer» C. Copper, phosphorus and nickel | |
| 232. |
Graphite is corroded by_________________? |
| A. | Sulphuric acid (10%) |
| B. | Sea water |
| C. | Hydrochloric acid |
| D. | None of these |
| Answer» E. | |
| 233. |
Graphite is a good________________? |
| A. | Thermal & electrical insulator |
| B. | Conductor of heat |
| C. | Conductor of electricity |
| D. | Both B. & C. |
| Answer» E. | |
| 234. |
Glass lined vessels are not used for handling/storing__________________? |
| A. | Dilute H2SO4 |
| B. | Dilute HNO3 |
| C. | Dilute HCl |
| D. | Hydrofluoric acid |
| Answer» E. | |
| 235. |
Glass lined vessels are not used for handling__________________? |
| A. | Dilute H2SO4 |
| B. | Dilute HNO3 |
| C. | Dilute HCI |
| D. | Hydrofluoric acid |
| Answer» E. | |
| 236. |
Glass is corroded by________________? |
| A. | Fluorine (dry or wet) |
| B. | Sulphuric acid |
| C. | Phosphoric acid |
| D. | None of these |
| Answer» B. Sulphuric acid | |
| 237. |
German silver used for decorative purposes contains maximum percentage of___________________? |
| A. | Silver |
| B. | Copper |
| C. | Zinc |
| D. | Nickel |
| Answer» C. Zinc | |
| 238. |
German silver is an alloy of copper, nickel and________________? |
| A. | Zinc |
| B. | Silver |
| C. | Tin |
| D. | Lead |
| Answer» B. Silver | |
| 239. |
German silver in an alloy of________________? |
| A. | Copper, nickel and zinc |
| B. | Copper, aluminium and silver |
| C. | Silver, zinc and aluminium |
| D. | Silver, nickel and zinc |
| Answer» B. Copper, aluminium and silver | |
| 240. |
Generally _____________ are subjected to galvanising (i.e., zinc coating)? |
| A. | Non-ferrous metals |
| B. | Non-metals |
| C. | Low carbon steels |
| D. | Stainless steel |
| Answer» D. Stainless steel | |
| 241. |
Gas holder of a gobar (cow-dung) gas plant is made of___________________? |
| A. | Molybdenum stainless steel |
| B. | Tin |
| C. | Mild steel |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 242. |
Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as_____________________? |
| A. | Sherardizing |
| B. | Parkerising |
| C. | Anodising |
| D. | None of these |
| Answer» B. Parkerising | |
| 243. |
Galvanising is generally done on___________________? |
| A. | Non-ferrous metals |
| B. | Low carbon steel |
| C. | Stainless steel |
| D. | Cast iron |
| Answer» C. Stainless steel | |
| 244. |
Galvanising (i.e., zinc coating) of steel sheets is done to______________________? |
| A. | Prevent its rusting by contact with corrosive atmosphere |
| B. | Protect the base metal by cathodic protection |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 245. |
Galvanised iron is___________________? |
| A. | Harder |
| B. | Protected from rusting |
| C. | Alumina coated iron |
| D. | None of these |
| Answer» C. Alumina coated iron | |
| 246. |
For storing water and acid free benzol, use a ______________ vessel? |
| A. | Steel |
| B. | Karbate |
| C. | Stainless steel |
| D. | None of these |
| Answer» B. Karbate | |
| 247. |
For spinning viscose rayon, the extrusion spinnerettes are made of ___________________? |
| A. | Platinum or gold alloys |
| B. | High carbon steel |
| C. | Aluminium |
| D. | Nickel |
| Answer» B. High carbon steel | |
| 248. |
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 | |
| 249. |
For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is__________________? |
| A. | Stainless steel |
| B. | Cast iron |
| C. | Aluminium |
| D. | Nickel |
| Answer» C. Aluminium | |
| 250. |
Ferric stainless steels compared to austenitic stainless steels________________? |
| A. | Have lower corrosion resistance |
| B. | Are harder to fabricate |
| C. | Are less ductile and hence less suitable for cold pressing |
| D. | All A., B. and C. |
| Answer» E. | |