The Armed Forces Professional Abilities Battery (ASVAB) is an entry test for entry into the US Army. You cannot join the US Army without using the ASVAB.

The top ASVAB study guide has two main goals: first, to determine whether you have the mental ability to enlist in the military branch of your choice, and second, the results help the service determine which military occupation you choose to have the mental abilities for.

When Congress passed the Electoral Services Act in 1948, the Department of Defense needed to develop a single screening test for use by all services. This is the first iteration of the AFQT, 100 multiple choice questions, with each branch of service setting its own standard for the minimum score required.

The Department of Defense stepped up the test by standardizing it in all branches in the 1960s. ASVAB was officially introduced as a test in the US military in 1976. The ASVAB contains nine separate time subtests.

With the exception of some fleet jobs, "Location Assembly" has not been included in the linear evaluation calculations for military tasks and is not used to determine the overall evaluation of the ASVAB. 

At some point, "assembly objects" for certain military tasks (especially those requiring knowledge of spatial relationships) were included in various linear evaluations. This relatively new subtest has 16 questions and you have 9 minutes to answer them.