If you ask too many bad questions (if they get closed with lots of downvotes) the site software itself will stop you from asking questions for a while. That's out of the hands of the mods - we can neither make a question ban nor lift one.
If someone asks lots of questions and becomes somehow disruptive to the community by doing so, the mods could give them a manual suspension for a while.
If someone asks a lot of good questions, well that's usually a good thing!
However if someone is constantly asking a lot of questions, like multiple questions every single day, and if they're fairly short and simple, we might ask them to slow down and consider if they can look for answers themselves first, and only post the ones which they really can't find any solution to. And if someone is asking a lot of questions in quick succession they're probably not doing due diligence to look for duplicates first. That way we can encourage high quality interesting questions, which is more valuable than pure quantity of questions.