The civics test is an oral test and the USCIS Officer will ask the applicant up to 10 of the 100 civics questions. An applicant must answer 6 out of 10 questions correctly to pass the civics portion of the naturalization test.
If you need to be able to know these questions to become a citizen… all citizens that want to change the government should know them.
It would instantly filter out voters that don’t know or care about the United States.
Try it out yourself.