MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. |
As the carbon content in the steel increases __________ |
| A. | strength increases and ductility decreases |
| B. | strength and ductility decreases |
| C. | strength and ductility increases |
| D. | ductility increases and strength decreases |
| Answer» B. strength and ductility decreases | |
| 2. |
As the temperature increases, the difference between the strength of a notched sample and un-notched sample ____________ |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | cannot be determined |
| Answer» C. remains constant | |
| 3. |
The Notch strength ratio is ________________ for brittle notch. |
| A. | more than 1 |
| B. | less than 1 |
| C. | equal to 1 |
| D. | less than 0 |
| Answer» C. equal to 1 | |
| 4. |
The notch strength ratio is defined as ____________ |
| A. | maximum load for the notched specimen/tensile strength for un-notched specimen |
| B. | tensile strength for un-notched specimen/maximum load for the notched specimen |
| C. | minimum load in notch specimen/minimum load in the un-notched specimen |
| D. | maximum load in notch specimen/maximum load in the un-notched specimen |
| Answer» B. tensile strength for un-notched specimen/maximum load for the notched specimen | |
| 5. |
The notch strength is defined as the ___________ |
| A. | maximum load/Maximum cross-sectional area |
| B. | minimum load/notch cross-sectional area |
| C. | maximum load/notch cross-sectional area |
| D. | average load/average cross-sectional area |
| Answer» D. average load/average cross-sectional area | |
| 6. |
The stress-relaxation test uses the concept of predicting the reduction in internal stress with time. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
The Zener-Hollowman (Z) is equal to ___________Where ϒ-strain rate, ε-strain, σ-stress, T-temperature, ΔH-activation energy, R- universal gas constant. |
| A. | σ*exp(-ΔH/RT) |
| B. | ε*exp(-ΔH/RT) |
| C. | ϒ*exp(-ΔH/RT) |
| D. | exp(-ΔH/RT) |
| Answer» D. exp(-ΔH/RT) | |
| 8. |
The Zener-Hollowman parameter is used in defining a ___________ |
| A. | constitutive equation of plastic deformation |
| B. | relationship between the state of stress and strain rate |
| C. | relationship between the state of strain and strain rate |
| D. | relationship between the elastic and plastic deformation |
| Answer» B. relationship between the state of stress and strain rate | |
| 9. |
A hard testing machine will produce the upper and lower yield point faithfully. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
The hard and soft tensile testing machine is defined based on the __________ |
| A. | the hardness of the sample |
| B. | the hardness of the floor on which it is installed |
| C. | by the stiffness/spring constant of the machine |
| D. | by the stiffness/spring constant of the specimen |
| Answer» D. by the stiffness/spring constant of the specimen | |
| 11. |
If the crosshead of the tensile testing machine is moving with constant velocity v, then after time t, the total displacement of crosshead will be vt. A specimen is held between the crosshead of the machine. The total displacement in the sample will be ______________ |
| A. | more than vt |
| B. | less than vt |
| C. | equal to vt |
| D. | indeterminate |
| Answer» C. equal to vt | |