MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
The most suitable instrument for fractography is _________ |
| A. | SEM |
| B. | TEM |
| C. | XRD |
| D. | AFM |
| Answer» B. TEM | |
| 2. |
Which of the following steel will have the highest strength? (Given that the initial composition of raw material is the same for all). |
| A. | Vacuum furnace melted steel |
| B. | Induction furnace melted steel |
| C. | Muffle furnace melted steel |
| D. | Tube furnace melted steel |
| Answer» B. Induction furnace melted steel | |
| 3. |
The formation of microcracks in metal can occur due to _________ |
| A. | inclusion |
| B. | solute atom |
| C. | dislocation |
| D. | vacancy |
| Answer» B. solute atom | |
| 4. |
What is the temperature over which ductile material converts into a brittle material? |
| A. | 100 |
| B. | 10 |
| C. | 50 |
| D. | 2 |
| Answer» E. | |
| 5. |
The mode of fracture is more temperature-dependent in FCC material than in BCC material. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
For ductile material, best way to predict the failure in stress is by examining __________ |
| A. | critical resolved shear stress |
| B. | critical resolved normal stress |
| C. | uniaxial tensile stress |
| D. | uniaxial shear stress |
| Answer» B. critical resolved normal stress | |
| 7. |
The FCC material s usual mode of fracture is necked down to a point before rupture. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
For the given component the critical resolved shear stress will be equal to _________
|
| A. | n<a href="https://www.sanfoundry.com/wp-content/uploads/2020/01/mechanical-metallurgy-questions-answers-griffith-theory-brittle-fracture-1-q2.png"><img alt="Critical resolved normal stress will be equal to (P/A)*cos 2 for load applied" class="alignnone size-full wp-image-265745" height="251" src="https://www.sanfoundry.com/wp-content/uploads/2020/01/mechanical-metallurgy-questions-answers-griffith-theory-brittle-fracture-1-q2.png" width="248"/></a> |
| B. | P/A |
| C. | P*cos |
| D. | (P/A)*cos *cos |
| E. | (P/A)*cos <sup>2</sup> |
| Answer» D. (P/A)*cos *cos | |
| 9. |
The brittle fracture of single crystal is related with __________________ on the cleavage plane. |
| A. | critical resolved shear stress |
| B. | critical resolved normal stress |
| C. | uniaxial tensile stress |
| D. | uniaxial shear stress |
| Answer» C. uniaxial tensile stress | |