Applying for the Trainee scheme? The questions you ask show sufficient knowledge to prove that your keenness and preparation are of the required standard. You will not get answers to this question for any Company chaps would only be risking embarrassment due to lack of understanding! Are you sure that you are not already in the Company? Either way, if you find your question interesting then Management may well be your best option.
My answer; you should have put more fuel on.
If diversion required; STN has a few good curry establishments in town for a good price (hence, it is known as the Commercial alternate!)