In ____, the lower electrode is stationary while movement is transferred to the upper electrode by means of an arm, which moves about a pivot point.
A) rocker-arm spot welders
B) press-type spot welders
C) portable spot welders
D) resistance welders

Question

Quizplus · Accepted Answer

This statement describes the operation of rocker-arm spot welders, as the lower electrode remains stationary while the upper electrode is moved by an arm. Press-type spot welders also have a stationary lower electrode, but the upper electrode moves directly down onto the workpieces rather than by an arm. Portable spot welders are handheld tools and therefore do not have a stationary lower electrode. Resistance welders is a broad term that could include all of the other types mentioned.

In ____, the Lower Electrode Is Stationary While Movement Is