Hehehehe... Tech quiz... (shakes head and shivers at the thought)
Well... of the 6 guys at my interview not one studied for it and not one walked out with anything more positive to say than 'thank f that is over'.
The tech quiz certainly reminds you that there is a whole bunch of information out there that is COMPLETELY IRRELIVANT to day-to-day airline operations.
On the third day they told us that if we hadda stuffed up the tech quiz and ended up below 'the Emirates' mark, we would have had the chance to sit another one again.
My feeling is that the tech quiz is there to sort out the airline pilots from the rest. If you are an airline pilot you will know enough to get through, and the sim ride will prove this. If you're worried about the tech quiz then spend the US$30 and buy the book... But don't think they won't see through that facade.
Otherwise... See SOPS' post about 2 up. About the best information you'll be able to get from this thread.