ALSTOM Graduate Engineer interview questions

Applied for Graduate Mechanical/Electrical Engineer UK. First online test, Next video interview, Then assessment centre: 3 activities on the day. First is a group exercise where you have to build a model train within a certain set of requirements. Next, there is a 1-to-1 interview with a manager. They ask 4 x standard interview questions and 2 x technical questions. The technical questions are either mechanical or electrical. I picked electrical, and got shown a circuit breaker trip times graph and asked how to reduce the fire risk if a Lithium-Ion battery was used to power a train. Finally, there is a 1 hour slot to read a case study based on a compressor failure on-board a train. You then present your findings to a manager (again 1-to-1).