Well the final 2391 written exam is coming up this Thursday and I've been revising like mad every night ,read the guidance note 3 five times and still learning and been going through question papers so wish me luck people this time I will pass.
Have no fear mate. I teach the course, and have read GN3 a lot more than 5 times, and look at past papers constantly, and i am still learning.
My tips,
Take your time and read the question properly.
Use the correct terminology, no abbreviations whatsoever.
If the question has 3 marks available, they want 3 things to be mentioned, 10 marks, then 10 things and so on.
When you draw the earth loop path for a given system, do the right one, dont do TNS if they want TNCS etc. There is usually 15 marks for this, 8 for correctly labelling the diagram, and 7 for getting the diagram correct or vice versa.
If you have to "show all calculations" then show them, this usually gets thrown in for resistances in parallel, so include the steps that have the letters in like Rt =, etc.
On the scenario part, read very carefully, and make sure you know what documentation you will need to provide to the client on completion of the works. More often that not you will be given a scenario that requires an Electrical Installation certificate, schedule of test results, and a schedule of inspections for a new installation only for the new or refurbished work, and an electrical installation condition report and schedule of test results for the existing installation that has been inspected and tested for insurance purposes or similar. On that note ALWAYS mention Inspection before Testing in anything that you write.
In most cases it is incorrect terminology or not answering the question properly when you knew the answer that gets the fails. Steer clear of those, and you will be fine. C&G examiners are ruthless, and will mark you on what you write, not what they think or know you mean, so be precise and to the point.
Good luck,
Cheers..............Howard