See you want to get a seat in NIT TRICHY Mechanical branch. Congrats. Well you are OBC NCL candidate and above that you are fromhome state and also you are female candidate. 

If i see previous year closing rank then mechanical branch closed on 5238 rank in round 7. If you have under this rank then you are eligible to get a seat in nit trichy. One thing , one can never predict percentile from rank. See the rank. 

All the best.