how to add requirement to answer a questionnaire or email upon joining forum (for vetting purposes)

I know of a forum that requires new members to answer a questionnaire and write a message to the admin's email address upon joining. They have a strict vetting process. One of the questions is about "who referred them" and simply asking them "why they would like to join"

I would like it very much if there were an option to do this on my forum!! It would make it easier to figure out who to approve and who not to for the forum. Most of the members are just friends of friends and people we know. If they are not, I would like them to at least state why they would like to join.

Is there a way to do this?

ACP(Admin Control Panel) > Users and Groups >  Users > Profiles > Profile fields

create a new profile field and set it a required