McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electrical Engineering .
| 251. |
Cold working process is carried out on ……….. Recrystallisation temp. |
| A. | equal |
| B. | above |
| C. | below |
| D. | none of the above |
| Answer» C. below | |
| 252. |
Coordination number for closest packed crystal structure |
| A. | 16 |
| B. | 12 |
| C. | 8 |
| D. | 4 |
| Answer» B. 12 | |
| 253. |
Coordination number in simple cubic crystal structure |
| A. | 8 |
| B. | 6 |
| C. | 12 |
| D. | 4 |
| Answer» B. 6 | |
| 254. |
Coordination Number of Body-Centered Cubic structure is….. |
| A. | 6 |
| B. | 8 |
| C. | 10 |
| D. | 12 |
| Answer» B. 8 | |
| 255. |
Ligancy of FCC structure are….. |
| A. | 6 |
| B. | 8 |
| C. | 10 |
| D. | 12 |
| Answer» D. 12 | |
| 256. |
HCP structure have ligancy ….. |
| A. | 6 |
| B. | 8 |
| C. | 10 |
| D. | 12 |
| Answer» D. 12 | |
| 257. |
Crystal structure is arrangement of in different patterns |
| A. | electrons |
| B. | protons |
| C. | atoms |
| D. | crystals |
| Answer» C. atoms | |
| 258. |
Crystallographic planes are represented by 3 numbers enclosed in |
| A. | {} bracket |
| B. | [ ] square bracket |
| C. | ( ) raound bracket |
| D. | none of the above |
| Answer» C. ( ) raound bracket | |
| 259. |
crystallography is study of |
| A. | pattern formation of electrons |
| B. | patterns formation of protons |
| C. | different pattern formation of atoms |
| D. | none of the above |
| Answer» C. different pattern formation of atoms | |
| 260. |
Cu diffuses in FCC Ni, this is type of impurity |
| A. | substitution al |
| B. | interstitial |
| C. | both a & b |
| D. | none of the above |
| Answer» A. substitution al | |
| 261. |
Decrease in free energy during recovery is attributed to |
| A. | excess point defects |
| B. | excess dislocations |
| C. | grain boundaries |
| D. | all |
| Answer» A. excess point defects | |
| 262. |
Decrease in free energy during recrystallization is attributed to |
| A. | excess point defects |
| B. | excess dislocations |
| C. | grain boundaries |
| D. | all |
| Answer» B. excess dislocations | |
| 263. |
Deformation of steel at room temperature is |
| A. | hot working |
| B. | cold working |
| C. | both a and b |
| D. | can’t say |
| Answer» B. cold working | |
| 264. |
Density of material depends on ….. |
| A. | no.of atoms/unit cell |
| B. | atomic packing factor |
| C. | coordinatio n number |
| D. | both a&b |
| Answer» D. both a&b | |
| 265. |
Dimensional accuracy is better in |
| A. | hot working |
| B. | cold working |
| C. | both a and b |
| D. | can’t say |
| Answer» B. cold working | |
| 266. |
Dislocations have types |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 5 |
| Answer» C. 3 | |
| 267. |
Example for strengthening mechanism in single-phase material |
| A. | strain hardening |
| B. | precipitatio n hardening |
| C. | fiber strengthenin g |
| D. | dispersion strengthenin g |
| Answer» A. strain hardening | |
| 268. |
FCC crystal having crystal systems. |
| A. | 12 |
| B. | 10 |
| C. | 6 |
| D. | 24 |
| Answer» A. 12 | |
| 269. |
FCC have Average no. of atoms per unit cell |
| A. | 6 |
| B. | 2 |
| C. | 4 |
| D. | 8 |
| Answer» C. 4 | |
| 270. |
FCC have ligancy number |
| A. | 6 |
| B. | 12 |
| C. | 4 |
| D. | 8 |
| Answer» B. 12 | |
| 271. |
FCC having atomic packing factor |
| A. | 0.68 |
| B. | 0.52 |
| C. | 0.74 |
| D. | 0.72 |
| Answer» C. 0.74 | |
| 272. |
FCC having stacking |
| A. | abcabca bc |
| B. | aaaaaaa |
| C. | abababa b |
| D. | abcabab c |
| Answer» A. abcabca bc | |
| 273. |
FCC materials are good in …. |
| A. | brittle |
| B. | malleable |
| C. | ductile |
| D. | hard |
| Answer» C. ductile | |
| 274. |
Figure out the odd one in the following |
| A. | frenkel defect |
| B. | tilt boundary |
| C. | twist boundary |
| D. | stacking fault |
| Answer» A. frenkel defect | |
| 275. |
Fine grain size, usually, can not be obtained during the following process |
| A. | slow cooling |
| B. | increasing nucleation rate |
| C. | retarding grain growth |
| D. | fast cooling |
| Answer» A. slow cooling | |
| 276. |
Following strengthening mechanism applies to multi-phase material |
| A. | grain size reduction |
| B. | dispersion hardening |
| C. | solid solution strengthenin g |
| D. | strain hardening |
| Answer» B. dispersion hardening | |
| 277. |
Forces required in cold working is than hot working |
| A. | greater |
| B. | less |
| C. | equal |
| D. | can’t say |
| Answer» A. greater | |
| 278. |
Frenkel defect have missing of |
| A. | cation |
| B. | anion |
| C. | electron |
| D. | both a&b |
| Answer» A. cation | |
| 279. |
Good surface finish in................ process |
| A. | cold working |
| B. | hot working |
| C. | casting |
| D. | welding |
| Answer» A. cold working | |
| 280. |
grain boundaries the dislocation motion |
| A. | allows |
| B. | restricts |
| C. | bypass |
| D. | all of the above |
| Answer» B. restricts | |
| 281. |
Grain boundaries decides of dislocations that can move |
| A. | lenghts |
| B. | magnitude |
| C. | direction |
| D. | none of the above |
| Answer» A. lenghts | |
| 282. |
Handling is difficult in |
| A. | hot working |
| B. | cold working |
| C. | both a and b |
| D. | can’t say |
| Answer» A. hot working | |
| 283. |
Hardness during over-aging |
| A. | decreases |
| B. | increases |
| C. | constant |
| D. | decreases abruptly |
| Answer» A. decreases | |
| 284. |
HCP have Average no. of atoms per unit cell |
| A. | 6 |
| B. | 2 |
| C. | 4 |
| D. | 8 |
| Answer» A. 6 | |
| 285. |
HCP having atomic packing factor |
| A. | 0.68 |
| B. | 0.52 |
| C. | 0.74 |
| D. | 0.72 |
| Answer» C. 0.74 | |
| 286. |
Lower the degree of deformation, recrystallization temperature is |
| A. | higher |
| B. | lower |
| C. | no effect |
| D. | either higher or lower |
| Answer» B. lower | |
| 287. |
Higher the degree of deformation, recrystallization temperature is |
| A. | higher |
| B. | lower |
| C. | no effect |
| D. | either higher or lower |
| Answer» A. higher | |
| 288. |
Hot working process is carried out on ……….. Recrystallisation temp. |
| A. | equal |
| B. | above |
| C. | below |
| D. | none of the above |
| Answer» B. above | |
| 289. |
If the deformation is carried at 0°C, it is |
| A. | cold working |
| B. | hot working |
| C. | both a and b |
| D. | can’t say |
| Answer» D. can’t say | |
| 290. |
If the deformation is carried at 100°C, it is |
| A. | cold working |
| B. | hot working |
| C. | both a and b |
| D. | can’t say |
| Answer» D. can’t say | |
| 291. |
If the deformation is carried at 500°C, it is |
| A. | cold working |
| B. | hot working |
| C. | both a and b |
| D. | can’t say |
| Answer» D. can’t say | |
| 292. |
If the deformation is carried out above RCT, it is |
| A. | cold working |
| B. | hot working |
| C. | both a and b |
| D. | none |
| Answer» B. hot working | |
| 293. |
If the deformation is carried out below RCT, it is |
| A. | cold working |
| B. | hot working |
| C. | both a and b |
| D. | none |
| Answer» A. cold working | |
| 294. |
In BCC, the lattice parameter (a) is |
| A. | (4/√3) r |
| B. | 4/√3 r |
| C. | (4/√2) r |
| D. | 4/√2 r |
| Answer» A. (4/√3) r | |
| 295. |
In case of polycrystalline materials regeneration rate of dislocations |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | can’t say |
| Answer» A. increases | |
| 296. |
In climb, the dislocation moves of the surface |
| A. | in , glide |
| B. | out, glide |
| C. | in, twinns |
| D. | out, twinns |
| Answer» B. out, glide | |
| 297. |
In Cold work,strength |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | none |
| Answer» A. increases | |
| 298. |
In cold working, corrosion resistance |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | can’t say |
| Answer» B. decreases | |
| 299. |
In cold working, due to strain hardening ductility of metal |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | can’t say |
| Answer» B. decreases | |
| 300. |
In cold working, electrical resistance |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | can’t say |
| Answer» A. increases | |
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