____ are those in which a change is considered to affect the mechanical properties of the weldment to the point of requiring requalification of the procedure.
A) Essential variables
B) Nonessential variables
C) Code parameters
D) WPS parameters

Question

Quizplus · Accepted Answer

Essential variables are those that are considered critical to the quality of the weld, and any change to them may impact the mechanical properties of the weldment to the point where the welding procedure must be requalified. Nonessential variables do not have this level of impact and therefore do not require requalification. Code parameters and WPS parameters are more generic terms that may include both essential and nonessential variables.

____ Are Those in Which a Change Is Considered to Affect