I am making a 1 off return to this thread to point out that this is poor advice. Whether you are an internal or external applicant the 70 questions are the same for everyone, this is to give a fair way of scoring external applications against internal ones. The questions towards the end are aimed fairly and squarely at existing signallers and you are not expected to be able to answer them. They ask you whether you have specific signalling experience and you cannot answer yes honestly unless you currently are or have been a signaller (or at least some front line operational railway experience) in the past.
One of the most annoying things for me as a hiring manager is when an external candidate answers yes to one of these questions and then fills the box with a load of waffle that does not actually relate to the question that was asked. If the question is ‘do you have experience of setting up complex possessions’ and you say ‘yes I often have to deal with complex logistical problems in my current role blah blah blah’ then you are not answering the question that was asked but you still get a point automatically added to your score. When they say experience of possessions, trespassers, level crossings, line blockages, isolations, that is what they mean. To answer yes honestly, you personally need to have experience of these things in a railway role.
I look at it (and I know I am not alone in this) as a way of artificially inflating your score. You certainly do not get marks from me for ingenuity in twisting the meaning of a question to what you want it to ask instead.
TLDR - do not worry if you cannot answer yes to all the questions as an external candidate, you are not meant to be able to.