According to AST M E709-95 and API, after removing magnetization of parts afterexamination, the residual magnetism shall not exceed (1 gauss = 0.0001 tesla):

According to AST M E709-95 and API, after removing magnetization of pa

1.	According to AST M E709-95 and API, after removing magnetization of parts afterexamination, the residual magnetism shall not exceed (1 gauss = 0.0001 tesla):
A.	3 × 10-4T (3gauss)
B.	4 × 10-4T (4 gauss)
C.	6 × 10-4T (6gauss)
D.	8 × 10-4T (8 gauss)
Answer» B. 4 × 10-4T (4 gauss)