 
			 
			MCQOPTIONS
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				This section includes 8 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 burger vector is perpendicular to the dislocation line in ____________ while it is parallel for ________________ | 
| A. | screw dislocation, edge dislocation | 
| B. | edge dislocation, screw dislocation | 
| C. | edge dislocation, mixed dislocation | 
| D. | mixed dislocation, screw dislocation | 
| Answer» C. edge dislocation, mixed dislocation | |
| 2. | A pure edge dislocation can move in direction perpendicular to its length by _________ however, it may move vertically (along its length) by a process known as ______ | 
| A. | glide, climb | 
| B. | climb, glide | 
| C. | kink, glide | 
| D. | kink, jog | 
| Answer» B. climb, glide | |
| 3. | In a positive edge dislocation, the atomic arrangement results in a ____________ above the slip plane and a ______________ below the slip plane. | 
| A. | compressive stress, tensile stress | 
| B. | tensile stress, compressive stress | 
| C. | compressive stress, compressive stress | 
| D. | tensile stress, tensile stress | 
| Answer» B. tensile stress, compressive stress | |
| 4. | The dislocation is considered as the region of localized lattice disturbance separating the slipped and unslipped areas in a crystal. | 
| A. | True | 
| B. | False | 
| Answer» B. False | |
| 5. | For a given metal, the energy required to move an atom from the interior of a crystal to its surface is E=1eV (0.16*10-18). Find the fraction of the vacant lattice site in metal at 500 degree Celsius. | 
| A. | 3.06*10<sup>-7</sup> | 
| B. | 1.02*10<sup>-10</sup> | 
| C. | 6.27*10<sup>-3</sup> | 
| D. | 8.2*10<sup>-18</sup> | 
| Answer» B. 1.02*10<sup>-10</sup> | |
| 6. | Which of the following defect is a thermodynamically stable defect? | 
| A. | Vacancy | 
| B. | Interstitial atom | 
| C. | Dislocation | 
| D. | Stacking fault | 
| Answer» B. Interstitial atom | |
| 7. | Which of the following is Not a structure sensitive property? | 
| A. | Yield strength | 
| B. | Fracture Strength | 
| C. | Semiconductor property | 
| D. | Specific heat | 
| Answer» E. | |
| 8. | Which of the following is Not a structure insensitive property? | 
| A. | Elastic modulus | 
| B. | Melting point | 
| C. | Coefficient of thermal expansion | 
| D. | Electrical resistivity | 
| Answer» E. | |