See as per the information available online, Chandigarh University offers BE Lateral Entry programs in which the diploma students can apply and can save a year and get direct admission to the 2nd year of BE. As per the official website, the student need to apply for CUCET in order to get admission in the course.

For the official website you may visit:

https://www.cuchd.in/engineering/be-lateral-entry-program.php

To know more about CUCET visit the link below:

https://engineering.careers360.com/articles/cucet-engineering

TO know more about Mechanical Engineering visit the link below:

https://www.careers360.com/courses/mechanical-engineering-course

I hope this answer helps. All the very best for your future endeavors!