We have all experienced the pressure of sitting an exam but, oh dear, school has nothing to do with university. There are three main characteristics that differ school exams/A-levels to uni examinations: complexity, time consumption and uncertainty of performance.
First of all, the contents of the module to be examined are usually a whole new bunch of stuff you have never seen before. You only need to check out the names of the subjects: structural analysis, aerodynamics… where are my known physics, chemistry or biology?
Forget about being in a class where you revise previous years’ content, as this is very unlikely to happen in a lecture theatre at 9 am.