Hello, the Diploma in Mechanical Engineering is a 10th-level Diploma course which involves a professional specialization in the field of designing and also with the application of the standards of Material Science for Investigation, Planning, Assembling, and the Upkeep of mechanical frameworks.This course is 3-year long in duration, and the minimum eligibility for the course  is the successful completion of the 10+2 level of education, in a Science stream  from a recognized educational Board.
Top Institutes offering this course are:
Lovely Professional University
Rameshwaram Institute of Technology andManagement 
Also the
Galgotias University
Rai University
Amity University, Noida
And few others

Hello,
Look it depends upon your experience and knowledge of any branch so that we can get the best placement according to your prescribe interview and describe my life so keep looking for good luck.