Originally Posted by PontiusPilot

Know your way around a Jeppesen chart and be prepared to brief an approach. Review the systems of the aircraft you're currently flying as well, as you'll probably be asked about it. Otherwise, I'd suspect it's mostly CRM or situational decision-making type questions.

I wouldn't expect too many curve balls. Dress to look the part, have a good demeanor, and you should be fine.