Anything technical that I was asked was from the document. There were few situational things, including what I would do if my friend turned up to work drunk, and a long winded thing about a 747 crashing off the end of the runway and whether I would keep the runway in use after various changes had taken place (debris cleared, fuel unloaded etc) and with certain conditions in place (last 100m not used, taking off downwind away from the crash etc) when said plane would not be removed for three days.
The sequencing question is similar to this- it's using common sense and backing up your answer with a reason (you can't just say no...). If you're looking for info on vortex spacing then wikipedia does as good a job as any-
Wake turbulence - Wikipedia, the free encyclopedia - it's handy to know (though they probably won't ask that question so specifically since it's been discussed at such length in this thread)...
The idea for these I guess is that you're not prepared- they are questioning your ability to make snap decisions but be able to think them through logically and be founded.
Good luck, as long as you've read up and come across as confident you should be fine!
