Explanation should include

following manufacturer procedures
determining the correct welder type, electrode, wire type, diameter, resistant spot welder, and gas to be used in a specific welding situation
setting up welding equipment
adjusting the welder to tune for proper electrode stick-out, voltage, polarity, flow rate, and wire-feed speed required for the material being welded
storing, handling, and installing high-pressure gas cylinders
determining the work clamp (e.g., ground) location and attaching
using the proper angle of the gun to the joint and the direction of the gun travel for the type of weld being made in the flat, horizontal, vertical, and overhead positions
identifying the causes of spits and sputters, burn-through, lack of penetration, porosity, incomplete fusion, excessive spatter, distortion, and waviness of bead
identifying cause of contact, tip burn-back, and failure of the wire to feed
making necessary adjustments.

Process/Skill Questions:

What are the alternatives for cutting high-strength steel without damage to structural integrity?
What is the maximum temperature for MIG welding high-strength low-alloy (HSLA) steel?
What is used to determine metal temperature when welding?