ASVAB is divided into 9 main parts. You can visit this website to study for the ASVAB exam, you need to know what each section is and how to prepare specifically for it.

General Sciences: It tests your general scientific knowledge including physical sciences, chemistry, and biology. 

Arithmetic Thinking: This section consists of math problems with words. 

Knowledge of words: It tests your knowledge of lexical words by comparing them with other lexical words. In other words, you need to learn vocabulary 

Understanding paragraphs: Think of this passage as reading comprehension. You will be given a short section to read and then asked to answer related questions. This section reviews your general understanding of information. 

Math skills: This is an easy fix for the math equation part. You will be tested on math concepts you learned in high school and asked again for the correct answer without using a calculator. 

Electronic information: This is a scary part for many students as it covers topics related to electricity, including electricity, circuits, wiring, and related calculations. However, this section does not consider your AFQT. 

Arithmetic: The AI cuts were tested separately on CAT-ASVAB on the MET-ASVAB mix. As with EI, don't worry unless these fields are mandatory. If this is your preferred area of expertise, take your ASVAB booklet to a mechanic who will want to help and review concepts by checking them in real cars and engines.