I know the ASTB is required for those attending OCS. For those going DCO through the Reserves for AMDO, would they still need to take the ASTB?I found this website and found that it had practice tests for the ASTB. It shows your weak areas as well as strong ones by each section in the test. I also found the electronic version of the 8th edition Peterson's Master the Military Flight Aptitude Tests and 8th edition Master the Officer Candidate Tests on there. Pretty nifty!
Cheers
http://www.nelnetsolutions.com/dod/