Which set of lead grades has a grade out of sequence?
A. H, HB, B, 3B
B. 7B, H, F, 3H
C. 6B, B, H, 4H
D. 9H, HB, B, 2B
Answer:B
Which set of lead grades has a grade out of sequence?
A. H, HB, B, 3B B. 7B, H, F, 3H C. 6B, B, H, 4H D. 9H, HB, B, 2B