Theres a few of them over on the sparky heaven website which is run by the lads over on the IET forum.
Q1, I'd have gone for something like the installed apparatus is to the correct standards, it is installed correctly and not damaged.
Q2, It is suitable for its intended use. It complies with other requirements. Not entirely sure on this one.
Q3, Petrol station, caravan site, marina.
Q4, a) an electric fence, b) an overhead line to an outbuilding, c) a motor control circuit.