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. |
What does ij represent in a 3 3 stress matrix? |
| A. | Stress is applied on i face of the material in the +ve j direction |
| B. | Stress is applied on i face of the material in the -ve j direction |
| C. | Stress is applied on j face of the material in the +ve i direction |
| D. | Stress is applied on j face of the material in the -ve i direction |
| Answer» C. Stress is applied on j face of the material in the +ve i direction | |
| 2. |
Calculate the dilation of body, given that the initial volume is 250 mm2 and final volume is 235.5 mm2. |
| A. | 0.058 |
| B. | 0.061 |
| C. | 0.050 |
| D. | 0.060 |
| Answer» B. 0.061 | |
| 3. |
Calculate the hydrostatic strain, if x, y, z are 0.01, 0.2, 0.05 respectively? |
| A. | 0.2 |
| B. | 0.866 |
| C. | 0.125 |
| D. | 1 |
| Answer» C. 0.125 | |
| 4. |
Experimentally, strain in the material with high precision is measured by _________ method. |
| A. | calorimetry |
| B. | hardness testing |
| C. | bonded wire resistance gauge |
| D. | microscopy |
| Answer» D. microscopy | |
| 5. |
The part of strain tensor which involves in the shape change rather than the volume change is called strain deviator ij. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Dilation on parallelepiped with strains in x, y, z direction equals to x, y, z respectively:The total volume change is given as = x + y + z for the small strain. The mean stress or hydrostatic (spherical) component of stress will be equal to ____ |
| A. | |
| B. | /2 |
| C. | /3 |
| D. | /4 |
| Answer» D. /4 | |
| 7. |
Dilation of the mechanical body is ____________ |
| A. | change in the length of the body |
| B. | change in the area of the body |
| C. | change in the volume of the body |
| D. | change in the width of the body |
| Answer» D. change in the width of the body | |
| 8. |
For the following stress matrix, the first invariant of the stress tensor is the trace of a matrix, the sum of diagonal element: I1 = 11 + 22 + 33. The second invariant of matrix is equal to _________ ( begin{vmatrix} sigma_{11} & sigma_{12} & sigma_{13} sigma_{21}& sigma_{22} & sigma_{23} sigma_{31}& sigma_{32} & sigma_{33} end{vmatrix} ) |
| A. | Sum of all the elements of the matrix |
| B. | Sum of first column elements |
| C. | Sum of first raw elements |
| D. | Sum of all the principal minors of the matrix |
| Answer» E. | |
| 9. |
The number of components required to define an elastic constant is ______ |
| A. | 3 |
| B. | 9 |
| C. | 27 |
| D. | 81 |
| Answer» E. | |
| 10. |
Matrix (2-dimensional arrays) is a second rank tensor. |
| A. | True |
| B. | False |
| Answer» B. False | |