Question

post - test
all the following are true about gas metal arc welds except:
a. gas metal arc welds use a consumable electrode.
b. filler metal is not required for gas metal arc welds.
c. heat is produced by arcing spark between the base metal and bare wire electrode.
d. gas metal arc welds are used in collision repair to join panels back together.

Explanation:

In gas - metal arc welding (GMAW), a consumable electrode is used which melts and acts as filler metal. The heat is generated by the arcing spark between the base metal and the bare - wire electrode, and it is commonly used in collision repair for joining panels. Filler metal is indeed required as the electrode melts and fills the joint gap.

Answer:

B. Filler metal is not required for gas metal arc welds.