"Describe the landing gear system of the Seneca. Tell me all the ways you can verify that your landing gear is down and locked."

"You take off in your Seneca at MTOW and at 50 feet your critical engine fails. You promptly clean the airplane up and put the airspeed right on the blue line and you are still slowly descending. What do you do then?"

To be honest, FAR questions tripped me up more than any systems question on my interviews...in particular I got grilled on an ASA interview with IFR operations questions pertaining to 121 and I choked. The TMAAT (tell me about a time) or hypothetical/situational questions are mostly easy but they want to see your thought process and how you come to a decision.

Good luck!