MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Metals with wide stacking faults (low SFE) strain-harden more rapidly, twin easily on annealing, and shows a different temperature dependence of flow stress than metals with narrow stacking faults. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The _______ the stacking-fault energy, the higher the separation between the partial dislocations and the ________ the stacking fault. |
| A. | lower, wider |
| B. | higher, wider |
| C. | lower, narrow |
| D. | higher, narrow |
| Answer» B. higher, wider | |
| 3. |
Which of the following represents the extrinsic stacking fault in the FCC Metal? |
| A. | ABCABCABC |
| B. | ABCBCABC |
| C. | ABCACBCABC |
| D. | ABABABABA |
| Answer» D. ABABABABA | |
| 4. |
The stacking fault in FCC will create a thin region of ___________ in stacking of the FCC. |
| A. | HCP |
| B. | BCC |
| C. | SC |
| D. | DC |
| Answer» B. BCC | |
| 5. |
The stacking sequence of the atomic arrangement for HCP is ___________ |
| A. | ABCABCABC |
| B. | ABABABABA |
| C. | AABBAABBAA |
| D. | AAAAAAAAA |
| Answer» C. AABBAABBAA | |
| 6. |
The stacking sequence of the atomic arrangement for FCC is ___________ |
| A. | ABCABCABC |
| B. | ABABABABA |
| C. | AABBAABBAA |
| D. | AAAAAAAAA |
| Answer» B. ABABABABA | |
| 7. |
Which of the following is not matching correctly?Metal ————> Twin Plane ———> Twin Direction |
| A. | alpha iron ——> (112) ————–>[111] |
| B. | Silver ———-> (111) ————–>[112] |
| C. | Copper ———-> (111) ————–>[112] |
| D. | Zinc ————> (112) ————–>[111] |
| Answer» E. | |
| 8. |
There are three metals given below.Metal A – Very few numbers of the slip systemsMetal B – High critical resolved shear stressMetal C – High number of the slip systemWhich of the following is more susceptible for twining? |
| A. | Metal A |
| B. | Metal A and Metal B |
| C. | Metal A and Metal C |
| D. | Metal C |
| Answer» C. Metal A and Metal C | |
| 9. |
Twinning is not associated with specific crystallographic direction; it only depends on the direction of mechanical force. There is no preferred orientation of twinning in crystal. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Tin cry phenomena is associated with ______________ |
| A. | twin |
| B. | slip |
| C. | annealing |
| D. | oxidation |
| Answer» B. slip | |