As far as the written: What is an Inverter? Expect a few questions with the Jepps, max holding speed with different alt. What is MSA? When is ILS critical area in effect? Given an approach plate and was asked is the airport open 24 hours? (Tower was part time but airport is 24 hours, tried to trick you a little) too many other questions can't seem to remember all.....
On top of the other website mentioned above, also tried this one...
http://www.mypilotcareer.com/Piedmont.htm --- Yes, this is pretty good.
Good Luck.