AWS Installation Techniques 3

Question 1

When installing shielding gas supply lines for MIG welding, which material is NOT recommended for flexible hose sections?

Accepted Answer

Natural rubber hose

Answer

Natural rubber hose is not recommended for shielding gas lines because it can outgas contaminants that degrade weld quality and may absorb moisture.

Question 2

During the installation of a robotic welding cell, what is the purpose of installing the welding power source outside the cell enclosure?

Accepted Answer

Both A and B are correct

Answer

Locating the power source outside the robotic cell both reduces electromagnetic interference with sensitive robot controls and allows maintenance without entering the guarded enclosure.

Question 3

What is the maximum recommended distance between the welding power source and the work for SMAW to minimize voltage drop?

Accepted Answer

100 feet total combined cable length

Answer

AWS recommends keeping total combined cable length (electrode plus work leads) to 100 feet or less to minimize resistance-related voltage drop and maintain arc quality.

Question 4

When installing a plasma cutting system, where should the air dryer/filter assembly be positioned relative to the plasma unit?

Accepted Answer

Immediately before the plasma unit inlet

Answer

The air dryer and filter must be installed immediately before the plasma unit inlet to remove moisture and contaminants as close to the point of use as possible.

Question 5

A TIG welding installation requires a high-frequency arc starter. What electrical installation precaution is mandatory?

Accepted Answer

Proper grounding and shielding of nearby electronic equipment and controls

Answer

High-frequency arc starters emit electromagnetic interference that can damage or disrupt PLCs, CNC controls, and other electronic equipment if proper shielding and grounding are not installed.

AWS Practice Test

AWS Practice Test

AWS Installation Techniques 3