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1. |
ASTM Grain size measurement method counts the __________________ |
A. | number of grain in 1 mm<sup>2</sup> at magnification of 1X |
B. | number of grain in 1 mm<sup>2</sup> at magnification of 100X |
C. | number of grain in 100 mm<sup>2</sup> at magnification of 1X |
D. | number of grain in 100 mm<sup>2</sup> at a magnification of 100X |
Answer» B. number of grain in 1 mm<sup>2</sup> at magnification of 100X | |