This isn't my homework, This is relevant to one of the CSWIP 3.1 questions which I found it a little strange:
which of the following defects are likely to be missed using x-ray as the inspection medium?
1. plate lamination, lack of side wall fusion on a single U butt weld preparations and cap overlap.
2. toe crack, plate laminations and lack of side wall fusion on asingle U butt weld preparation
3. plate laminations, lack of inter run fusion with the mag welding process and cap overlap
4. all defects are detected when using xray
I found that true answer is the second.