MCQOPTIONS
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MCQOPTIONS
This section includes 12 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 following hysteresis cycle represents the adiabatic loading and unloading of a sample in the elastic region, without thermal equilibrium. Which region of the curve is associated with constant temperature? |
| A. | A & C |
| B. | B & D |
| C. | C & D |
| D. | D & A |
| Answer» B. B & D | |
| 2. |
The following hysteresis cycle represents the adiabatic loading and unloading of a sample in the elastic region, without thermal equilibrium. Which part of the curve is associated with decrease in the temperature of the sample? |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 3. |
The following hysteresis cycle represents the adiabatic loading and unloading of a sample in the elastic region, without thermal equilibrium. Which part of the curve is associated with increase in the temperature of the sample? |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 4. |
Two identical specimens are strained simultaneously in the elastic region. Sample-1 was loaded slowly and allowed to achieve thermal equilibrium, while sample-2 was loaded rapidly and heat transfer was not allowed. The stress-strain curve for these for sample 2 will be represented by the curve __________ |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 5. |
Two identical specimens are strained simultaneously in the elastic region. Sample-1 was loaded slowly and allowed to achieve thermal equilibrium, while sample-2 was loaded rapidly and heat transfer was not allowed. The stress-strain curve for these for sample 1 will be represented by the curve __________ |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 6. |
If the material is expanded elastically with very high rate, such that there is no thermal equilibrium between the material and surrounding, and also the expansion is adiabatic (no exchange of heat). The temperature of the material with strain will __________ |
| A. | increase |
| B. | decrease |
| C. | remain constant |
| D. | no relation |
| Answer» C. remain constant | |
| 7. |
The elastic after effect is the decay of strain to zero with time after releasing the load on material. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
As the temperature increases, the anelastic behaviour of the material ________________ |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | no relationship |
| Answer» B. decreases | |
| 9. |
The material at room temperature does not have any anelastic behavior. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
The creep becomes significant above _______ of the homologous temperature. |
| A. | 0.2 |
| B. | 0.1 |
| C. | 0.5 |
| D. | 0.9 |
| Answer» D. 0.9 | |
| 11. |
At an elevated temperature, the material behaves as ____________ |
| A. | elastic |
| B. | plastic |
| C. | viscoelastic |
| D. | viscous |
| Answer» D. viscous | |
| 12. |
The equilibrium number of vacancy in a crystal lattice ____________ with increasing temperature. |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | no relationship |
| Answer» B. decreases | |