MCQOPTIONS
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MCQOPTIONS
This section includes 7 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 graph shows the change in hardness with the variation of the temperature of the material. There is an abrupt change in the slope of the line. This cannot be due to ____________ |
| A. | change in the crystal structure of the material |
| B. | allotropic transformation |
| C. | change in the deformation mechanism of the material |
| D. | creation of the vacancy in the material |
| Answer» E. | |
| 2. |
The hardness value of the metal ______________ with increase in the temperature. |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | no relationship |
| Answer» C. remains constant | |
| 3. |
For measuring the hardness of the cementite and ferrite in a pearlite colony individually, the Knoop hardness measurement is the best method. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
For the same long diagonal length of indenter of Vickers hardness and Knoop hardness, the Knoop hardness is how much percentage of the Vickers indenter? |
| A. | 50 % |
| B. | 15 % |
| C. | 75 % |
| D. | 100 % |
| Answer» C. 75 % | |
| 5. |
The Knoop hardness number(KHN) is defined as the applied load divided by the unrecovered projected area of the indentation. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
The shape of Knoop indenter is of ___________ |
| A. | rounded end tip |
| B. | square-based pyramid |
| C. | pyramid with major and minor diagonal |
| D. | pyramid with a rounded end |
| Answer» D. pyramid with a rounded end | |
| 7. |
If the hardness of the case carburized steel needs to be measured, the possible method to measure the hardness of the case will be _________ |
| A. | Rockwell |
| B. | Knoop |
| C. | Vickers |
| D. | Brinell |
| Answer» C. Vickers | |