Which of the following physical property can be used to estimate indirectly the proportional limit of gold alloys ?
Correct answer: B. Brinell hardness number
- A. Vickers's hardness number
- B. Brinell hardness number
- C. Knoop hardness number
- D. Rockwell hardness number
Explanation
For gold alloys, Brinell hardness correlates with strength and can be used to estimate the proportional limit indirectly. The other hardness scales are valid hardness tests but are not the conventional relationship intended here.
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