Make sure you know exactly what to expect on the day of testing. The total time to take the test is a little more than three hours. Be prepared to sit that long. The test is all multiple choice and covers science, math, reading, vocabulary, electronics, auto and shop, mechanical comprehension and assembling objects. There are a total of 225 questions that can be given electronically or on paper and most of the testing is done in the evening.
Develop a strategy when dealing with each question. Each multiple-choice question has four possible answers. Your job is to choose the best answer. Never leave an answer blank. You will not be penalized for a wrong answer so at least guess. Try using elimination. When you are asked a question, try to narrow your choices down. The more answers you can eliminate, the better your odds of getting it right. All questions are worth the same amount of points. Don't get hung up on one question and run out of time, move on to the next question and come back to it. Make sure you have answered the correct response before finalizing your answer and unless you are absolutely sure you answered wrong, don't go back and change an answer. Your first guess will usually be correct.
Practice tests are an excellent way to prepare for the ASVAB. Practice tests will help you to familiarize yourself with the way the test is presented and the material that is on the test. Make sure to practice the practice tests under test conditions, such as being timed. Be sure to check your answers and review why you got them wrong. Learn what your weaknesses are and study up.