What is the average grain diameter (in mm) for the grain size ASTM gr – McqOptions

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1.	What is the average grain diameter (in mm) for the grain size ASTM grain size 12?
A.	0.0066
B.	.0078
C.	.0021
D.	.0056
Answer» E.

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What is the average grain diameter (in mm) for the grain size ASTM grain size 12?