If you are looking for entrance exams for government engineering colleges in Tamil Nadu, I will be attaching links from Careers360 where you can access the top colleges and their admission details. These resources will help you know the required exams, eligibility criteria, and application process to secure a seat in the best government engineering colleges in the state.
https://engineering.careers360.com/colleges/list-of-government-engineering-colleges-in-tamil-nadu
https://engineering.careers360.com/colleges/ranking/top-government-engineering-colleges-in-tamil-nadu

Generally, TNEA is used for government engineering collages in Tamil Nadu. However you also go through exams like CUET for central university programs, or Tamil Nadu Common Entrance Test (TANCET) for postgraduate studies in the state.                                                                                                                                                                                                                                                                                           Thank You.

Hello,

For admission into government engineering colleges in Tamil Nadu , there is no separate entrance exam . Admission is done through TNEA (Tamil Nadu Engineering Admissions) which is conducted by Anna University.

Seats are allotted based on your Class 12 marks in Physics, Chemistry and Mathematics , followed by a counselling process.

For institutes like NIT Trichy , you need to clear JEE Main .

Hope it helps !