In ____, the movement of the upper electrode is controlled by a pneumatic or hydraulic cylinder.
A) rocker-arm spot welders
B) press-type spot welders
C) portable spot welders
D) resistance welders

Question

Quizplus · Accepted Answer

Press-type spot welders have a mechanism that controls the movement of the upper electrode, which is typically a pneumatic or hydraulic cylinder. Rocker-arm spot welders and portable spot welders do not have this feature. Resistance welders refer to a broader category of welders that includes both press-type and rocker-arm welders, but not all resistance welders have controlled upper electrode movement.

In ____, the Movement of the Upper Electrode Is Controlled