Here's a short post on good questions to ask in an interview, when they ask you "Do you have any questions?"

• What skills are the most important for this position?
• What is the most important thing you're looking to solve by filling this position?
• What is your vision for "the project/product"?
• What is the overall vision of the company?
• Can you tell me what you think i'm lacking to fulfil this role?
• Are there any suggestions for areas I would need to improve, to better fill this role?

Just something I wrote up before starting an interview. It's good to sit down for at least five minutes and figure out more specific questions, that you actually would like answered.

There's no harm in asking and it can make a world of difference for you to figure out if you'd like to join the company/team.

Of course it completely depends on your situation at the time. Take all of this with a grain of salt!