Hello Palaniyappan,

Top 15 mechanical engineering colleges in Tamil Nadu are mentioned below:

• Indian Institute of Technology Madras
• National Institute of Technology
• Vellore Institute of Technology 
• PSG College of  Technology 
• PSG Institute of Advanced Studies 
• SASTRA University
• Tamil Nadu Agricultural University
• Coimbatore Institute of Technology 
• Amrita Vishwa Vidyapeetham Coimbatore Campus
• SRM Engineering College
• Vinayaka Missions University
• Noorul Islam University
• Academy of Maritime Education and Training University
• Periyar Maniammai University Faculty of Engineering Technology 
• Ponnaiyah Ramajayam Institute of Science and Technology University

Good luck 

Hi aspirant, thanks for your query.

There are many good engineering colleges in tamTamil Nadu placement wise. Some of them are as follows:

• IIT Madras
• NIT Trichy
• VIT Vellore
• Amrita School of Engineering, Coimbatore
• College of Engineering, Guindy
• PSG College of Technology, Coimbatore
• SRM Institute of Science and Technology, Chennai
• Shanmugha Arts Science Technology Research and Academy, Thanjavur

and many more.

You can visit the following lionk for more information on the top engineering colleges in Tamil nadu for Mechanical Engineering:

https://engineering.careers360.com/colleges/ranking/2018/top-engineering-colleges-in-tamil-nadu

Hope this helps!