1.

What is the tensile strength of grade 220 iron?

A. 220 Dyne/mm<sup>2</sup>
B. 220 N/m<sup>2</sup>
C. 220 N/mm<sup>2</sup>
D. 220 Dyne/cm<sup>2</sup>
Answer» D. 220 Dyne/cm<sup>2</sup>


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