Lightning Mate,
It was given to me by my instructor in a sample paper so i do not know the source- i havent looked through any of the books for that specific question yet. not to drift off the subject but tere were a few ambiguous questipons in there e.g what advantge does an alternator offer over a generator? two of the possible answers were a: its lighter b: it produces power at low rpm. I answered b but was told that in fact a was correct.
We were told that there will be a few questions in the real exam like this where they could be as GBZ said earlier "probably written by a Quantity Surveyor with English as a second language." While im confident that i understand the subject i am inclined to agree and move on. but having said that i think i will make good use of the note paper in the exam if i come across such questions!
M