Nukeworker has a practice test. You didn't say what you are seeking, nor your background or why you seek such a job. If you do a more thorough search of the nuke worker posts, it will explain how to get in the industry. You will find many expect someone like you to do your own research before asking others to do all the finer points. If you are seeking to start without experience, expect to start at the bottom. This industry is not the gold mine it once was. Many find it a lot of thankless work with hundreds lined up ahead of you trying to get in.