Certified Welder Welding Process Application 3

Question 1

Submerged Arc Welding (SAW) is most commonly used for:

Accepted Answer

High-deposition-rate welding of thick, flat, or horizontal joints in production settings

Answer

SAW excels at high-deposition flat and horizontal welding of thick materials, making it ideal for shipbuilding, pressure vessels, and structural fabrication.

Question 2

When welding aluminum with GMAW, which shielding gas is most commonly used?

Accepted Answer

100% Argon

Answer

100% Argon is the standard shielding gas for GMAW on aluminum because it provides good arc stability and the cleaning action needed for aluminum oxide removal.

Question 3

In Resistance Spot Welding (RSW), the weld is formed by:

Accepted Answer

Applying pressure and electrical resistance heat between two overlapping workpieces

Answer

RSW creates a weld nugget through the combination of electrode pressure and the heat generated by electrical resistance at the interface of the workpieces.

Question 4

What is the purpose of back-purging with argon when welding stainless steel pipe using GTAW?

Accepted Answer

To protect the back side of the root pass from oxidation (sugaring)

Answer

Back-purging fills the pipe interior with argon to shield the root weld from oxygen and nitrogen, preventing oxidation (sugaring) that degrades corrosion resistance.

Question 5

Which welding process uses a non-consumable electrode and separate filler rod added by hand?

Accepted Answer

GTAW/TIG

Answer

GTAW uses a non-consumable tungsten electrode to maintain the arc while the welder manually feeds filler rod into the weld pool as needed.

Certified Welder Practice Test

Certified Welder Practice Test

Certified Welder Welding Process Application 3