16-10-2008, 11:22 AM
In that case, I think you gave the right answer. The answer of zero ohms (the minimum possible) is not worthy of several marks for a second part of the question. Given that deduction, the only meaningful thing left for them to be asking for is, as you say, the highest value of shunt that will operate the relay, ie what is the worst value of train shunt that will occupy the track.
Perhaps they deliberatly word it like that to see that you are trying to give sensible though to what they are asking, but I will ask the question again at the exam review.
Perhaps they deliberatly word it like that to see that you are trying to give sensible though to what they are asking, but I will ask the question again at the exam review.