18-09-2016, 07:20 PM
Hello,
wondering if someone could point me to some reading material for 2015 Q1b.
2015 1b. Describe the parameters of a sanding system and the control related to it for safe operation of the whole railway system (10 marks).
I know what a sanding system is but not sure what its getting at by control related to it for safe operation of the whole railway system.
i get the whole too much sand causes resistance between the track and the axle so there is residiual current in the relay coil which could potentially be enough to keep the TBC relay energised and hence cause overshoot/ collisions etc. but i believe this is what the end of Q1C is asking me so not sure what this question is actually after or how i am meant to get 10 marks for it.
2015 1C. Discuss the effect on traction and braking of usin these controls and the implications for the train detection.
Thanks,
Lee.
wondering if someone could point me to some reading material for 2015 Q1b.
2015 1b. Describe the parameters of a sanding system and the control related to it for safe operation of the whole railway system (10 marks).
I know what a sanding system is but not sure what its getting at by control related to it for safe operation of the whole railway system.
i get the whole too much sand causes resistance between the track and the axle so there is residiual current in the relay coil which could potentially be enough to keep the TBC relay energised and hence cause overshoot/ collisions etc. but i believe this is what the end of Q1C is asking me so not sure what this question is actually after or how i am meant to get 10 marks for it.
2015 1C. Discuss the effect on traction and braking of usin these controls and the implications for the train detection.
Thanks,
Lee.