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 HRB scale of Rockwell hardness measurement range from _________ |
| A. | 0-100 |
| B. | 0-50 |
| C. | 20-70 |
| D. | 50-150 |
| Answer» B. 0-50 | |
| 2. |
If the material is showing a hardness value of HRc 57, which of the following combination of load and indenter is used for the measurement? |
| A. | Load-100 kg, indenter-diamond cone |
| B. | Load-150 kg, indenter-diamond cone |
| C. | Load-100 kg, indenter-1.6 mm diameter ball |
| D. | Load-150 kg, indenter-1.6 mm diameter steel ball |
| Answer» C. Load-100 kg, indenter-1.6 mm diameter ball | |
| 3. |
The Brale indenter is used for which hardness measurement method? |
| A. | Vicker s |
| B. | Rockwell |
| C. | Knoop |
| D. | Microhardness |
| Answer» C. Knoop | |
| 4. |
The Rockwell hardness scale is divided into 100 equal division, with each division representing a depth of __________ |
| A. | 0.002 mm |
| B. | 0.001 mm |
| C. | 0.01 mm |
| D. | 1 mm |
| Answer» B. 0.001 mm | |
| 5. |
The Rockwell hardness number unit is equal to __________ |
| A. | kg/mm<sup>2</sup> |
| B. | kg/mm |
| C. | kg-mm<sup>2</sup> |
| D. | unit less |
| Answer» E. | |
| 6. |
The minor load in the Rockwell hardness measurement is generally equal to ___________ |
| A. | 50 kg |
| B. | 150 kg |
| C. | 10 kg |
| D. | 20 kg |
| Answer» D. 20 kg | |
| 7. |
The most widely used hardness method is ______________ |
| A. | Rockwell |
| B. | Knoop |
| C. | Vicker s |
| D. | Brinell |
| Answer» B. Knoop | |
| 8. |
In the case of Vicker s hardness measurement, the softer material will have a higher hardness number, and harder material will have lower VHN. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
The Vicker s hardness number is given as _____________ |
| A. | P/L |
| B. | P/L<sup>2</sup> |
| C. | 1.854*P/L<sup>2</sup> |
| D. | 1.854*P/L |
| Answer» D. 1.854*P/L | |
| 10. |
The indenter used in the Vicker s hardness tester is _______________ |
| A. | steel ball with 1.6 mm diameter |
| B. | steel ball with 10mm diameter |
| C. | square-base diamond pyramid |
| D. | square-base flat-pyramid |
| Answer» D. square-base flat-pyramid | |