What is an example of situational irony in Fahrenheit 451?

The role ofthe fireman is to put out fire; however in the novel, iBradbury creates a paradoxical situation when he has Montagin his role of fireman, not only setting fires but finding great pleasure in doing so.

A paradox is a statement with surface contradiction but clear meaning. The unusual role of the fireman is really an example of situational irony, not paradox.