Which operation is typically included in the post-casting processing of sand casting?

In the post-casting processing of sand casting, trimming is a crucial operation. After the metal has cooled and solidified, the resulting castings often have excess material, such as flash, gates, and risers, which are necessary for the casting process but are not part of the final product. Trimming involves removing this excess material to achieve the desired shape and finish of the casting. This step is essential for ensuring that the final product meets dimensional specifications and surface quality requirements.

Casting, melting, and pouring all refer to steps in the initial forming of the metal before it solidifies and are therefore not part of the post-casting process. Trimming is specifically focused on refining the cast product after it has been formed, making it the correct answer in this context.