In a single pilot aeroplane there is no point reciting to pax what you intend to do if the engine fails on take off. They probably will not understand what you are talking about and will start asking questions which will distract you from the task in hand.
The way to do it in SPA is, as you line up 'mentally rehearse what might happen and how you would react' that is all.
The same with 'in flight checks', check what your examiner would like you to do, but I would say the professional approach is to do them silently. Talking out loud about fuel, mixture, pumps etc, again can upset passengers if they are nervous.