MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Manufacturing Processes knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A region of a crystal can become a nucleus and grow only if its size exceeds some minimum value. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
In recrystallization, an entirely new set of grains is formed. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The nuclei may form by ______ |
| A. | grain growth |
| B. | sub-grain growth |
| C. | nuclei boundary growth |
| D. | combining multiple grains |
| Answer» C. nuclei boundary growth | |
| 4. |
For ______ nucleation will take place preferentially at highly energetic sites. |
| A. | pure metals |
| B. | alloys |
| C. | polycrystalline |
| D. | brittle |
| Answer» D. brittle | |
| 5. |
The rate of nucleation can be defined as______ |
| A. | number of grains per unit area |
| B. | number of grains per unit volume |
| C. | number of nuclei formed per unit area per unit time |
| D. | number of grains formed per nuclei |
| Answer» B. number of grains per unit volume | |
| 6. |
The variation of this diameter with isothermal annealing time gives the _____ |
| A. | nucleation rate |
| B. | linear rate of growth |
| C. | grain size change rate |
| D. | diametrical growth rate |
| Answer» C. grain size change rate | |
| 7. |
The time rate of change of the diameter of a recrystallized grain is known as_____ |
| A. | diameter rate |
| B. | linear growth rate |
| C. | growth rate |
| D. | nucleation rate |
| Answer» C. growth rate | |
| 8. |
The number of nuclei that form per second is called as _____ |
| A. | recrystallization frequency |
| B. | nucleation frequency |
| C. | nuclei growth frequency |
| D. | grain growth frequency |
| Answer» C. nuclei growth frequency | |
| 9. |
The grain size will be smaller when ______ |
| A. | nuclei form rapidly and grow slowly |
| B. | nuclei form slowly and grow rapidly |
| C. | recrystallization temperature is high |
| D. | activation energy is low |
| Answer» B. nuclei form slowly and grow rapidly | |
| 10. |
The rate at which a metal recrystallizes depends on the rate of ______ |
| A. | cooling |
| B. | polygonization |
| C. | nuclei formation |
| D. | grain growth |
| Answer» D. grain growth | |