►FREE ASVAB Word Knowledge Practice Test - ►Pass your ASVAB Exam on Your First Try - ​ This ASBAB word knowledge test includes 40 questions measuring your ability to select the correct meaning of a word in context and to identify the best synonym for a certain word all within a relatively short time frame. This is essentially a vocabulary test with some questions asking you to select the correct definition of a word and other questions asking you to select the word from your options that is most similar in meaning to the word provided.