Just so my answer is clear; there is a difference between knowledge and intelligence. In my opinion tests are not a good way to measure intelligence but tests can measure knowledge.
For example, I am an ARRL Volunteer Examiner and I've helped to administer tests for amateur radio licenses. To get a basic Technician class license a candidate has to pass a multiple choice test. It doesn't matter how intelligent the candidate taking the test is. What matters is that the candidate can demonstrate knowledge of what the basic FCC laws are, how to operate a radio transmitter without causing interference of other radio communications and basic safety when working with electricity.