Frames - how do you determine the quality of the welding?

Bad welds....those are the welds you get when you use the cheepo mig outfits with no gass and that wonderful flux core steel wire....good looking welds are probably good if you know what you are looking at...bad looking welds are bad even if you dont know what you are looking at...Blakenstein..I thought that post about the signs was pretty good myself.