Questions for a PI:
- What is a typical day in the lab like for you / or a grad student?
- What instruments / protocols do you most frequently use in your lab?
- What do you find to be the strengths of this program?
- How would you describe the atmosphere in your lab?
I try to feel out the PI on this one. When I met with a woman at Penn State, we went on a side tangent of things to do in State College and how her son played rugby etc. This may not be appropriate for some "strictly business" interviews.
Questions for a student:
- What is a typical day like for you?
- What is your favorite / least favorite thing about graduate school?
- Why did you choose school X? (This is incredibly telling - if they say "they gave me the most money" - RED FLAG)
- What opportunities have you had to go to conferences, etc?
- Is there a lot of tension/animosity between the students here? (BE CAREFUL HERE- I asked this at Penn State only at the grad student dinner and the student literally said "Ask me anything. Ask me that question they tell you not to ask." But his answer was really helpful.)
- Where do you live, what are good places to live, do you have a car, etc (Logistics questions)
I ask A LOT of questions Hope this helps!