Question

The voltage current characteristics of the arc welding must be

Answer 1

Answer:

a. Exponentially rising

b. Drooping

c. Straight line

d. Parabolic

Answer 2

The voltage-current characteristics of the arc welding must be drooping.

• On constant current welding machines, the drooping V-I characteristics are employed.
• When an arc is struck in an arc welding machine (GMAW Welding Equipment), the electrode is effectively short-circuited, requiring a quick surge of current if the machine is not designed to prevent this.
• These unexpected surges are minimized by using a constant current machine.