Correlation of Stage 3 and Stage 4 corresponds to which category codes?

Correlation of Stage 3 and Stage 4 corresponds to which category codes?

• A. Category Code 2 and 3 (Metal Sound)
• B. Category Code 4 and 5 (Metal Unsound)
• C. Category Code 1 and 2 (Surface Prep)
• D. Category Code 3 and 4 (Pitting & Scaling)

Answer: (B)

Stage 3 and Stage 4 signal more advanced deterioration where the metal itself is compromised, not just surface conditions. In this framework, the category codes that describe Metal Unsound cover exactly those levels of severity, indicating significant metal loss or damage that affects integrity. So pairing Stage 3 and Stage 4 with the Metal Unsound codes makes sense, since both stages reflect conditions where the metal is no longer in a sound state. The other groupings describe either the surface condition or particular types of defects, rather than the overall unsound metal condition indicated by stages 3 and 4.

Stage 3 and Stage 4 signal more advanced deterioration where the metal itself is compromised, not just surface conditions. In this framework, the category codes that describe Metal Unsound cover exactly those levels of severity, indicating significant metal loss or damage that affects integrity. So pairing Stage 3 and Stage 4 with the Metal Unsound codes makes sense, since both stages reflect conditions where the metal is no longer in a sound state. The other groupings describe either the surface condition or particular types of defects, rather than the overall unsound metal condition indicated by stages 3 and 4.