cadetpilotwannabe
Hey there,
As far as I know, the english test does not involve any technical aviation english, nor are you required to answer any questions related to technical knowledge. Phrases they might ask you to define are idioms and expressions, for example, one of my friends was asked to explain what "crash-course" meant. Unless you can memorize an entire dictionary, otherwise the only preparation you can do is keep cool and try your best at the test.
Apparently you are not told your score, regardless if you passed or failed. If you passed then obviously you move onto Stage 2, and if you failed you will be asked to do 100 hours of English courses before attempting the ICAO test again. The CX ICAO test is an in-house test, and holding a current ICAO english rating does not exempt you from the test.
If anyone knows better than I do, please feel free to make corrections. Otherwise, good luck and try your best.