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. |
The dynamic tear test is the test used to measure the _______________ |
| A. | tensile strength |
| B. | fatigue strength |
| C. | impact strength |
| D. | creep strength |
| Answer» D. creep strength | |
| 2. |
A material with higher thickness will have a higher impact toughness compared to sample with lower thickness of the same material. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
The blue brittleness is phenomena observed in _____________ |
| A. | low carbon steel |
| B. | copper |
| C. | zinc |
| D. | aluminum |
| Answer» B. copper | |
| 4. |
The strengthening mechanism i.e., the strain aging increases the strength and decreases the transition temperature of the metal. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
If a steel having ASTM grain size number 5 have transition temperature equal to 20 degrees. For the same steel having ASTM grain size 10, the DBTT will be equal to __________ |
| A. | 20 |
| B. | 50 |
| C. | -50 |
| D. | Cannot predict |
| Answer» D. Cannot predict | |
| 6. |
what is the order of ductile to brittle transition temperature for killed steel, semi-killed steel, and rimmed steel? |
| A. | Killed steel>Semi-killed>Rimmed steel |
| B. | Killed steel<Semi-killed<Rimmed steel |
| C. | Rimmed steel >Killed steel>Semi-killed |
| D. | Rimmed steel<Killed steel<Semi-killed |
| Answer» C. Rimmed steel >Killed steel>Semi-killed | |
| 7. |
The addition of Phosphorus in steel ___________ the ductile to brittle transition temperature? |
| A. | decreases |
| B. | increases |
| C. | remains the same |
| D. | no relationship |
| Answer» C. remains the same | |
| 8. |
In the following diagram, energy vs. temperature shows steel of three different compositions. Based on the curve, find the correct order of amount of carbon present in the steel? |
| A. | C1>C2>C3 |
| B. | C3>C2>C1 |
| C. | C2>C3>C1 |
| D. | C1>C3>C2 |
| Answer» C. C2>C3>C1 | |
| 9. |
The addition of manganese in steel ___________ the ductile to brittle transition temperature? |
| A. | decreases |
| B. | increases |
| C. | remain the same |
| D. | no relationship |
| Answer» B. increases | |
| 10. |
The addition of carbon in steel ___________ the ductile to brittle transition temperature? |
| A. | decreases |
| B. | increases |
| C. | remains the same |
| D. | no relationship |
| Answer» C. remains the same | |