alexgoei Wrote:Hello Peter,
Appended please find my answers to the 2000 paper.
The layout for this paper has a single slip so the answer to Point 311 involves point-to-point with 310. Do look forward to your comments on this as putting a slip is very much favoured as a feature in the Module 3 layout.
One other question, can you confirm that there is no need to prove alight the Limit of Shunt and buffer stop lights in any of the signal controls?
Thank you and do look forward to your reply.
Regards
Quick answer re lamp proving:
1. ALWAYS prove alight a Limit of Shunt.
2. Similarly lamp prove any GPL which acts as one- i.e. when ON would stop a wrong direction movement continuing into the wide blue yonder on a line that is not signalled for that direction. Typical example is a GPL at the tips of a trailing crossover between running lines which only has a route reading over points Reverse to get train onto its right line- if ON then there would be a high chance of the points being normal and if passed at danger (because invisible) train would be going say in the down direction on the up line- ready for a head-on collision with oncoming train.
3. Don't lamp prove other PLs.
4. Don't prove buffer stops.
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Let's hope I am equally quiet at Sheffield this weekend as I was at Derby last weekend to have time to look at CTs.
In the meantime, in good "Blue Peter" fashion "here is one I did earlier".
A former student's attempt at 311 with my comments on their work. If your's differs it is not necessarily wrong but may well be......