Wasn’t there a Supreme Court case, which overruled the use of intelligence tests for employment? I think I’ve heard of court cases on the subject, which in turn led businesses to require a college degree for various types of jobs.
There are a variety of tests used for employment today.
Homeland Security has a test of various skills and aptitudes for TSA (I know because my wife took it and failed. ;-) ).
Various retail employers have skill and aptitude tests as well.