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. |
What will be interparticle spacing between the precipitate particles of radius r=2 micron. The volume fraction of particles in the matrix is 10%? |
| A. | 10 Micron |
| B. | 20 Micron |
| C. | 24 Micron |
| D. | 4 Micron |
| Answer» D. 4 Micron | |
| 2. |
The over aging of alloy ______________ |
| A. | increase the strength of the material |
| B. | decrease strength of the material |
| C. | increase the life of the component |
| D. | decrease the size of the precipitate |
| Answer» C. increase the life of the component | |
| 3. |
A precipitate particle in matrix provide strength to the material if the particle and matrix interface is considered. Which interface will provide maximum strength? |
| A. | Coherent interface |
| B. | Semi-coherent |
| C. | Incoherent |
| D. | Hardness does not depend up coherency |
| Answer» C. Incoherent | |
| 4. |
The chemical composition of θ’ is _______ |
| A. | CuAl3 |
| B. | Cu |
| C. | CuAl |
| D. | CuAl2 |
| Answer» E. | |
| 5. |
In aluminium-4.4% copper alloy system, which of the following represent the correct order? |
| A. | A=GP Zone, B=θ’’, C=θ’, D=θ |
| B. | A=θ’’, B=θ’, C=θ, D=GP Zone |
| C. | A=GP Zone, B=θ, C=θ’, D=θ’’ |
| D. | A=θ, B=θ’, C=θ’’, D=GP Zone |
| Answer» B. A=θ’’, B=θ’, C=θ, D=GP Zone | |
| 6. |
The most superior hardening technique for high temperature application is ___________ |
| A. | precipitation hardening |
| B. | dispersion strengthening |
| C. | cold working |
| D. | thermomechanical treatment |
| Answer» C. cold working | |
| 7. |
The coherency between the parent phase and particle is much better in precipitation-hardened alloys compared to dispersion hardened alloys. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
The solubility of second phase particles in dispersion hardened system is _____________ compared to precipitation-hardened system. |
| A. | higher |
| B. | lower |
| C. | equal to |
| D. | no relation |
| Answer» C. equal to | |
| 9. |
In precipitation hardening, the second phase must be soluble at a higher temperature and solubility ____________ with decreasing temperature. |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | does not follow define the path |
| Answer» C. remains constant | |