After almost a year of applying to the area hospitals, I finally have an interview for the emergency depaertment at one of the hospitals.

I have worked for almost a year as a CNA in a nursing home.
I have searched on this site for questions that I might encounter during the interview, but I am wondering as to what I should ask the interviewer. Several months ago I interviewd at a different hospital and I didnt have any questions prepared to ask them during the interview and I never heard back from them.
So I would like to go in prepared for this one, becuase I would really like to work for this hospital.
To those emergency department managers out there, what do you look for when hiring a CNA?
Some of the questions I came up with are;
What is the turn over rate?
Do you require on call?
How do you rotate weekends?
How do they schedule hoildays?
When do you expect to make a deision on filling the position?
May I call you in X number of days?
The length and type of my orientation?
Anything that I should ask that would be specific to the ED?
And something else that I am embaressed to ask and need help to ask without making myself sound stupid, but I applied for many positions for the ED, I am not sure which one I am being interviewd for.

Bassically any CNA position that was open in the hospital I have been applying at, because I knew that I wanted to work at this hospital. I know that it is a CNA position, however I am unsure of the hours that I am interviewing for, but I feel silly that I dont remeber, but the last time I applied was about two moths ago.