Question

shielded metal arc welding process requires what type welding power sources?

open circuit voltage
constant current
constant voltage
constant speed generator

Explanation:

Identify the welding process characteristics

Using the SMAW knowledge point
Shielded Metal Arc Welding (SMAW), commonly known as stick welding, is a manual arc welding process. In manual welding, the welder's hand movement naturally causes slight variations in the arc length, which directly affects the arc voltage.

Determine the required power source type

Using the Constant Current and Welding Power Sources knowledge points
To maintain a stable arc and consistent heat input despite manual fluctuations in arc length, SMAW requires a power source that keeps the welding current relatively stable. Therefore, a constant current (CC) power source is used, where a change in arc voltage results in only a minimal change in welding current.

Answer:

• Open circuit voltage
• Constant current (Correct answer)
• Constant voltage
• Constant speed generator