I tested out of year 2 (basic electricity). I have multiple certifications and a degree through the Navy though. When I tested out they also gave me all the OJT hours for year 2. I went from year 1 to year 3. They offered for me to test out of year 4 also, but I wouldn't be allowed to sit for the mechanic's test until I have 3 actual years in the trade, so I took the year 4 course. Don't count on testing out though. It's a rare occurrence.