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.
| 151. |
*$_Low carbon steels are those in which carbon percentage is around? |
| A. | 0.1 to 0.35 |
| B. | 0.4 to 0.7 |
| C. | 0.8 to 1.5 |
| D. | 1.5 to 2 |
| Answer» B. 0.4 to 0.7 | |
| 152. |
*$_Wrought iron is? |
| A. | High carbon iron |
| B. | Highly resistance to acid corrosion |
| C. | Malleable & ductile; and hence is used for chain links, hooks & couplings |
| D. | An alloy of iron, chromium & carbon |
| Answer» D. An alloy of iron, chromium & carbon | |
| 153. |
*$_Aqueous nitric acid is stored in __________ vessel.? |
| A. | Plain carbon steel |
| B. | Stainless steel |
| C. | Cast iron |
| D. | Thermosetting plastic material |
| Answer» D. Thermosetting plastic material | |
| 154. |
*$_Rubber lined vessels are corroded by the action of? |
| A. | Aqua regia |
| B. | Chloroform |
| C. | Sulphuric acid (95%) |
| D. | All of the above |
| Answer» E. | |
| 155. |
*$_White cast iron as compared to grey cast iron is? |
| A. | More durable |
| B. | Very brittle |
| C. | Very hard |
| D. | All of the above |
| Answer» E. | |
| 156. |
*$_Hydrochloric acid is stored in a __________ steel vessel.? |
| A. | Lead lined |
| B. | Rubber lined |
| C. | Glass lined |
| D. | Stainless |
| Answer» C. Glass lined | |
| 157. |
*$_High resistance electrical heating elements/wire are not made of? |
| A. | Marageing steel |
| B. | Nimonic alloys |
| C. | Kanthal wire |
| D. | Nichrome |
| Answer» B. Nimonic alloys | |
| 158. |
*$_The chlorinator used in the manufacture of DDT is made of? |
| A. | Glass |
| B. | Glass lined steel |
| C. | Teflon |
| D. | Bakelite |
| Answer» C. Teflon | |
| 159. |
*$_Glass lined vessels are not used for handling/storing? |
| A. | Dilute H‚ÇÇSO‚ÇÑ |
| B. | Dilute HNO‚ÇÉ |
| C. | Dilute HCl |
| D. | Hydroflouric acid |
| Answer» E. | |
| 160. |
*$___________ iron is produced, when molten pig iron is chilled suddenly.? |
| A. | White cast |
| B. | Grey cast |
| C. | Wrought |
| D. | None of these |
| Answer» B. Grey cast | |
| 161. |
*$_18/8 stainless steel means, that it contains? |
| A. | 18% chromium and 8% nickel |
| B. | 18% chromium and 8% molybdenum |
| C. | 18% nickel and 8% chromium |
| D. | 18% molybdenum and 8% chromium |
| Answer» B. 18% chromium and 8% molybdenum | |
| 162. |
*$_Which of the following has the least carbon percentage?? |
| A. | Low carbon steel |
| B. | Mild steel |
| C. | Wrought iron |
| D. | White cast iron |
| Answer» D. White cast iron | |
| 163. |
*$_Gas holder of a gobar (cowdung) gas plant is made of? |
| A. | Molybdenum stainless steel |
| B. | Tin |
| C. | Mild steel |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 164. |
*$_Residual magnetism in steel for magnets is increased by the addition of? |
| A. | Nickel |
| B. | Cobalt |
| C. | Tungsten |
| D. | Chromium |
| Answer» C. Tungsten | |
| 165. |
*$_A hardness depth of about 3 mm can be achieved by induction hardness in __________ seconds.? |
| A. | 5 |
| B. | 100 |
| C. | 250 |
| D. | 500 |
| Answer» B. 100 | |
| 166. |
*$_Nitriding of steel is done (in electric furnace) at __________ °C.? |
| A. | 510 |
| B. | 1720 |
| C. | 2210 |
| D. | 910 |
| Answer» B. 1720 | |
| 167. |
*$_Molten phthalic anhydride is stored in a/an __________ vessel.? |
| A. | Aluminium |
| B. | Nickel clad steel |
| C. | Lead lined steel |
| D. | Glass lined steel |
| Answer» B. Nickel clad steel | |
| 168. |
*$_Corrosion resisting properties of cast iron are significantly improved by the addition of 12 - 15% of? |
| A. | Tungsten |
| B. | Vanadium |
| C. | Silicon |
| D. | All of the above |
| Answer» D. All of the above | |
| 169. |
*$_Tin vessels are corroded by? |
| A. | Anhydrous ammonia |
| B. | Aromatic solvents |
| C. | Synthetic detergent solution |
| D. | None of these |
| Answer» E. | |
| 170. |
*$_Slow plastic deformation of metals under a constant stress is termed as __________ failure.? |
| A. | Fatigue |
| B. | Endurance |
| C. | Creep |
| D. | None of these |
| Answer» D. None of these | |
| 171. |
*$_Most common stainless steel type 316, which is highly resistant to corrosion contains? |
| A. | 16-13% Cr 10-14% Ni and 2-3% Mo |
| B. | 20-22% Cr, and 8-10% Ni |
| C. | 2-4% Cr, 22% NI and 2-4% Mo |
| D. | None of these |
| Answer» B. 20-22% Cr, and 8-10% Ni | |
| 172. |
*$_Thermosetting resins are those polymers, which? |
| A. | Do not increase in plasticity with rise in temperature |
| B. | Allow slip to occur between molecules |
| C. | Do not take on a permanent set |
| D. | None of these |
| Answer» B. Allow slip to occur between molecules | |
| 173. |
*$_Rotary kilns in cement industry are lined with____bricks.? |
| A. | Fireclay |
| B. | Silica |
| C. | Lead |
| D. | High alumina & high magnesia |
| Answer» E. | |
| 174. |
*$_Stainless steel contains? |
| A. | Chromium and nickel |
| B. | Copper |
| C. | Aluminium |
| D. | Vanadium |
| Answer» B. Copper | |
| 175. |
*$_Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.? |
| A. | Chromium |
| B. | Nickel |
| C. | Tungsten |
| D. | Cobalt |
| Answer» E. | |
| 176. |
*$_The softest material just next to talc in the Mhos scale is? |
| A. | Quartz |
| B. | Gypsum |
| C. | Feldspar |
| D. | Fluorite |
| Answer» C. Feldspar | |
| 177. |
*$_Spray dryer for evaporating milk to produce milk powder is made of? |
| A. | Lead lined steel |
| B. | Stainless steel |
| C. | Aluminium |
| D. | Cast iron |
| Answer» C. Aluminium | |
| 178. |
*$_The presence of impurities in iron? |
| A. | Increases its melting point |
| B. | Does not affect its melting point |
| C. | Decreases its melting point |
| D. | Makes it malleable |
| Answer» D. Makes it malleable | |
| 179. |
*$_Which of the following would not be a suitable material of construction for handling aqueous hydrofluoric acid (HF) at 100°C ?? |
| A. | Monel |
| B. | Stainless steel |
| C. | Graphite |
| D. | Kel-F and teflon |
| Answer» C. Graphite | |
| 180. |
*$_Cast iron vessels are not suitable for the storage of? |
| A. | Freon |
| B. | H‚ÇÇSO‚ÇÑ (95%) at room temperature |
| C. | H‚ÇÇSO‚ÇÑ (fuming) |
| D. | Wet SO‚ÇÇ |
| Answer» E. | |
| 181. |
*$_Which of the following is not shipped in mild steel containers?? |
| A. | Acetone |
| B. | Ammonia |
| C. | Ethyl alcohol |
| D. | Formic acid |
| Answer» E. | |
| 182. |
*$_Tank furnace used for melting of glass is made of? |
| A. | Mild steel |
| B. | Cast iron |
| C. | Refractory blocks |
| D. | Stainless steel |
| Answer» D. Stainless steel | |
| 183. |
*$_Which of the following is the most prone to atmospheric corrosion?? |
| A. | Silver |
| B. | Iron |
| C. | Tin |
| D. | Copper |
| Answer» C. Tin | |
| 184. |
*$_Liners of a ball mill are never made of? |
| A. | Lead |
| B. | Alloy steel |
| C. | Rubber or ceramic material |
| D. | Cast iron |
| Answer» B. Alloy steel | |
| 185. |
*$_Tempering of steel is done to make it? |
| A. | Brittle |
| B. | Hard |
| C. | Rollable |
| D. | Soft |
| Answer» E. | |
| 186. |
*$_Which of the following stainless steels is non-magnetic?? |
| A. | Ferritic |
| B. | Martensitic |
| C. | Austenitic |
| D. | None of these |
| Answer» D. None of these | |
| 187. |
*$_Constantan used in thermocouples is an alloy of? |
| A. | Iron & copper |
| B. | Copper & aluminium |
| C. | Lead & tin |
| D. | None of these |
| Answer» E. | |
| 188. |
*$_Diamagnetic materials are magnetised? |
| A. | Strongly |
| B. | Only slightly |
| C. | With eddy currents only |
| D. | In a direction opposite to that of the applied field |
| Answer» E. | |
| 189. |
*$_A material is able to retain the deformation permanently by virtue of its? |
| A. | Elasticity |
| B. | Plasticity |
| C. | Ductility |
| D. | Malleability |
| Answer» C. Ductility | |
| 190. |
*$_Lead? |
| A. | Is the hardest metal in common use |
| B. | Is the lightest metal in common use |
| C. | Can not be scratched by finger nails |
| D. | Can not be work hardened |
| Answer» E. | |
| 191. |
*$_Which of the following has the poorest wel-dability?? |
| A. | Low carbon steel |
| B. | Mild steel |
| C. | Wrought iron |
| D. | High-carbon steel |
| Answer» E. | |
| 192. |
*$___________ is used for determining the tensile strength of steels.? |
| A. | Hydraulic press |
| B. | Universal testing machine |
| C. | Mechanical press |
| D. | None of these |
| Answer» C. Mechanical press | |
| 193. |
*$_Which has the maximum melting point out of the following?? |
| A. | Steel |
| B. | Cast iron |
| C. | Stainless steel |
| D. | Wrought iron |
| Answer» E. | |
| 194. |
*$_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 | |
| 195. |
*$_Graphite is corroded by? |
| A. | Sulphuric acid (10%) |
| B. | Sea water |
| C. | Hydrochloric acid |
| D. | None of these |
| Answer» E. | |
| 196. |
*$_The damage/deterioration of metals by the __________ action of fluids is called 'erosion'.? |
| A. | Abrasive |
| B. | Corrosive |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» B. Corrosive | |
| 197. |
*$_Ceramic materials fabrication can not be done by? |
| A. | Welding |
| B. | Slip casting |
| C. | Extrusion |
| D. | Plastic pressing |
| Answer» B. Slip casting | |
| 198. |
*/*_White metal is an alloy of? |
| A. | Lead, tin and cadmium |
| B. | Copper, tin and zinc |
| C. | Copper and lead |
| D. | None of these |
| Answer» E. | |
| 199. |
*/*_Water gas generator is made of? |
| A. | Carbon steel-brick lined |
| B. | Stainless steel-lead lined |
| C. | Cast iron |
| D. | High carbon steel-procelain lined |
| Answer» B. Stainless steel-lead lined | |
| 200. |
*/*_Maximum consumption of copper is in? |
| A. | Utensil manufacture |
| B. | Electrical industry |
| C. | Industrial equipment manufacture |
| D. | Small scale industries |
| Answer» C. Industrial equipment manufacture | |