It’s amazing. We were 7 people, all around my age (17) and we were all so nervous for this exam, it was like being back at high school again. We all passed. I am relieved, because it was tougher than I thought, it was all new for me and it is all so different from what I used to work with.
The trainer I had for this course could be a brother of Michael Caine. He looked a lot like him, and his accent was rather, ehrm, voicilicious.
Just shortly on the explosives: they are small round flat circles that you put on the rail. They make a sound when the train drives over them and this alerts the driver that there is trouble ahead on the line and it will make him stop the train.
And about my electricity adventure: when I was young (13 is my guess) I was trying to be handy. I was opening and messing about with a screw driver and a power outlet/strip, while it was still connected. I got a major shock, my arm was numb for quite a while and I never ever forget it. I like to think that my mind got messed up by it, which is very useful if you want to be a writer.
Power on train lines: on the over rail lines (the ones above your head) : 25.000 volts. (never ever touch them). And on the 3rd rail that is an unprotected rail just running along normal rails on lots of places: 750 volts. This does cause a lot of accidents, especially when outsiders get onto the rail (kids playing or graffiti sprayers). I was quite surprised to hear that those rails are this dangerous. And I was wondering if we have the same system in the Netherlands and in Denmark. Just never ever step on or touch rails in the UK is what I’ve learned.