Munkii, I believe we've been here before, there are plenty of ways of finding information on the net via
This is a good starting point
Needlesports : Ropes that explains a lot of the basics.
Ropes are rated for a certain number of falls of a given '
fall-factor' (which is calulated as a function of the distance fallen) over a certain type of edge. Generally a ropes rated number of falls is the number of factor 2 falls it will take, but your rope can get trashed after just one fall.
As with virtually every other aspect of safety in relation to climbing/bouldering its all down to judgement.