Hi Praveen,

If you want to do a part-time diploma in Mechanical Engineering field in Chennai, you can opt for the PSB Polytechnic College in Chennai.It will be a course of duration four years.

For more details about this course like eligibility and fees, please refer this website:

https://www.careers360.com/colleges/psb-polytechnic-college-chennai/diploma-in-mechanical-engineering-part-time-course