05-10-2009, 11:04 AM
I have also attempted this question and came across similar concerns as others have mentioned in the thread.
I also went on assuming relay resistance as 9 ohms and came with feed end current as almost half of pick up current and left the question unanswered.
I wasn't sure whether it was possible to solve this question.
I also noticed that the question paper for this year is totally different to the pattern adopted in last five years. I was banking on few topics as power supply, fault trees, level crossing operation and track circuit. But most of the questions were asked for identifying hazards for particular system and I was quite disappointed during the first 10 min of period and could not do better.
I am not sure when one should expect the results, I was told by my invigilator that would be around Mar/Apr next year.
I now think that I can prepare better next time.
Regards,
I also went on assuming relay resistance as 9 ohms and came with feed end current as almost half of pick up current and left the question unanswered.
I wasn't sure whether it was possible to solve this question.
I also noticed that the question paper for this year is totally different to the pattern adopted in last five years. I was banking on few topics as power supply, fault trees, level crossing operation and track circuit. But most of the questions were asked for identifying hazards for particular system and I was quite disappointed during the first 10 min of period and could not do better.
I am not sure when one should expect the results, I was told by my invigilator that would be around Mar/Apr next year.
I now think that I can prepare better next time.
Regards,