Ok, revise V speeds. What they are and what they stand for. Also learn how to read a met chart. What a warm/cold front looks like, and what sort of weather to expect at each. Erm..... what else? Oh yes, factors affecting lift, remember the 1/2 rho V squared S equation etc. To be honest the tech questions form a fairly small part of the interview and you should be able to get through them fairly easily. More importantly make sure you have researched the company thoroughly, learn the history, the routes etc. etc. and make sure you have good answers for the standard personality type questions.
Good luck!