They want to interview me to make sure I have a proper understanding of electronic/electric equipment. I guess my job is on the line or something.

Ok, so all electric/electronic equipment is full of smoke, right. The smoke is what makes the equipment run. If you are sent defective equipment (which happens to me ALL the time for some reason), then the smoke is not properly sealed in. Usually the smoke ends up escaping along with some flying sparks, and the equipment stops working. This happens to me quite often. It's usually right after I wire something up and energize it. Anyway, now the boss wants to interview me with some of his associates to check my understanding. Does anybody know of a website or something that I can use as a quick refresher. That's all I really need.