Not so Crab. The TQ Lim functions during OEI training by design. Part of the 'realism' involves drooping the Nr hence the Tq Lim function. The TQ LIM button will allow the limitation of TWIN ENGINE TQ thus (in the eyes of some) protecting the transmission when doing 'tricky' stuff - like MAUW take-offs or heavy load lifts.Personally, I think that to be a misguided philosophy but some companies have it as an SOP.
G