How do you identify the 5 factors associated with Jhana? How do you recognise the different factors associated with Jhana and the level of Jhana you are in? (Not necessarily when you are in Jhana.)

More particularly how do recognise the factor of applied thought as such, factor of sustained thought as such, factor of rapture as such, factor of happiness as such and factor of one-pointedness of mind as such. How does the experience and correlate with the named factor such that it can be properly ascertained that this is infact this factor, and that factor has arisen and not something else or miss evaluation?
Applied thought and sustained thought are not the factors that you recognize, they are the factors that you generate. You know when you have them, because you are doing them!

Once you use applied and sustained thought properly, the factors of joy and ease (what you called rapture and happiness -- the translations I don't find precise) will emerge. These are very easy to recognize, because you will feel joyful and at ease! ;)