Step 1:
Buy a copy of the applicable code
Step 2
Open the book
Step 3
Read the book, its easy. Look in the index.
Now that I got your attention and there's a little steam escaping from under your cap; The MT is used to tests the cut surfaces for evidence of laminations. The UT can be used to detect the size of the laminations, i.e., the area affected by the lamination.
Al