A good piece of advice given to me years ago, regarding CAA exams.....
After each question, imagine the words "which of the following answers is least wrong?"
It usually works!
I complained once about some questions in a helicopter tech exam after I failed the paper by one or two percent. Some of the "correct" exam answers referred to switch positions which did not exist on the aircraft! The chief engineer, who also flew part-time, failed the same paper five (yes five!) times then apparently gave up in disgust...
The person setting that paper obviously had no experience of the aircraft (it was a new type in the country and we were the only operators).