Before applying any kind of glue, all of the parts should first be assembled and the fit of joints and other attachments carefully checked. This operation is generally called a __

Trial assembly.

Explanation:

Trial assembly can be defined as a strategic process which typically involves assembling the parts of a product to ensure that they perfectly fit.

Before applying any kind of glue, all of the parts should first be assembled and the fit of joints and other attachments carefully checked. This operation is generally called a trial assembly.

The main purpose of a trial assembly is to eliminate errors or mistakes before the permanent assemblage of a product and to ensure that the structure of a finished (end) product matches with the design model or prototype.

answer:

put more,