I took it about a year ago... those tests are pretty much what I remember.  I do remember circuit diagrams, and thinking "I could have scored higher if I had known to study those."  Memorize your basic circuit symbols, like resistors, capacitors, LEDs, transistors, etc.  I was trying to remember that stuff from high school physics, and could generally get it narrowed down to a 50-50 guess.  
Like others said, it's mostly you know it or you don't type stuff.  
Your recruiter should have a practice one, both paper study guides and a short 30 min practice test on a computer (mine did).  Check out your city library; mine had a whole shelf of study guides that I found after I had taken it.  
