The length of the straight portion of a bar beyond the end of the hook

1.	The length of the straight portion of a bar beyond the end of the hook, should be at least_______________?
A.	Twice the diameter
B.	Thrice the diameter
C.	Four times the diameter
D.	Seven times the diameter
Answer» E.

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The length of the straight portion of a bar beyond the end of the hook, should be at least_______________?

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