I work at a rail transport infirmary. Have you heard of this?
I know that a rail transport is a means of transferring people or goods on rails or tracks, but what's an infirmary? 
Yes you're right. Infirmary is just a storage area for transport parts. 
Oh that's neat! Do you mostly handle electric locomotives or engines that are run by diesel?
My work mostly involves electric locomotives since these are the most efficient and used almost everywhere!
Very nice! I always though railways are a very safe land transport system. Would you agree?
I agree yes. Not only safe but also environmentally friendly and quick! 
Very much so! Do you think it's more efficient because rail systems encounter lower frictional resistance than road vehicles?
Yes that exactly right! Road vehicles waste a lot of energy because of friction and air resistance. 
My area is getting a new light rail. I'm excited to have a fast train for urban public transport! Much nicer than driving!