Perform visual inspections on welded products and structures in progress and on completed jobs. Visual inspections search for defects in the weld such as cracks and pits. Uses magnification to find defects that potential weaken the strength of the joint. Measure welded products to ensure that they meet specifications for dimension. Uses stress equipment to put stress on weld joints. Determine if the weld will hold up under stressful conditions. Check weld machine setup and the welding techniques of welders on work in progress to ensure the quality of the work. Record the results of tests and welding inspections.