This test is considered a practice test to help you understand the General Aptitude Test and its nature. However, this test does not measure your true abilities, because it does not contain all types of questions in the real test. So look at it as an opportunity to gain some experience in answering and managing your time.
You can get the test practice booklet and the CD that has two, hour long, practice tests. (Found in all bookstores)
to National Center for assessment in Higher Education