It is helpful to tell students to think the question in their head first and then decide if they should ask the teacher. The saying 'ask 3, then me' could also work as it will allow the student to ask their question but then allow their classmates to answer them. Overall, whatever solution you choose, you should aim for the student to be able to self-regulate, determine if the question is necessary, and if they can find the answer in some other method instead of asking you directly.

I would apply several accommodations for the students. Provide written AND verbal directions. When they have the written directions, instead of explaining it over and over again, remind them that the written instructions are both on the board/at the table. Put them in groups with their peers, and remind them that they can also ask their peers for help rather than always asking the teacher. This benefits the student and their peers for giving them a sense of responsibility. Best of both worlds.

A lot of times, the older students get, the more intimidated they are to ask questions. This is often due to years of students making fun of their questions, their peers laughing at them, or teachers invalidating questions. Therefore it is important to approach this case with sensitivity, as you don't want to send the message that their question is "dumb" or that their question does not matter. Something you may want to try, is have students split into a few teams halfway through a lesson and have them discuss their questions with one another (just for about two minutes or so). This allows them to collaboratively learn. It may also enable students to realize they have similar questions that they can solve together. If there are still any unanswered questions, you could call on each team to collectively share their unanswered questions at the end of this activity, and respond to them.

I think a good solution would be to make a box for the whole class where they can write down their questions, comments, concerns, or anything else they might want to say on a little slip of paper to put into the box. This way, they can still ask all their questions without being a distraction or constantly talking. If the questions are related to the lesson, make sure that your directions are clear and you can write them on the board so they don't forget the instructions.

I would have the student ask the question then have them choose one of their classmates to answer it. I would also limit questions before assignments to 3 and then come around to answer all the other questions. If the whole class needs to hear the information I will make a secondary announcement with all comments/concerns.

To be honest, coming from someone who can't hear very well, asking questions was my thing. I think that if the kid is asking legitimate questions, you should not have a problem with that, in fact, you should be encouraging the question-asking.