Hello aspirant. If you observe closely, there in a higher jump of closing ranks in 2019 in all nits and iits. Not specific about trichy nit alone. Cut off to secure seat in any university depends on many factors like, no of students qualified, eligible, no of seats, students applying for that particular college and course etc. As the years increasing, there has been a rise in students who apply to the college and competition as well is even increasing. So to the point of your question. Last year that is in 2019, the number of students applied and became eligible for the courses in NIT trichy were really high compared to last before couple of years. Higher than the seats available too. So that why this huge jump.

Hope this helps

Regards

Nikhitha