Hi, Vacancies are available on various job portals. Refine your search on the portals & apply accordingly. Once you apply to the vacancies, make it a point to follow them up for the status of your Resume. This will help the recruiters to remember you. Here's a link to some vacancies:

http://jobsearch.naukri.com/mechanical-engineer-jobs

Here's a link to some job portals that might help you in your job search:

1- http://www.Naukri.com,
2- http://www.Firstnaukri.com
3- http://www.fresherslive.com
4- http://www.freshersworldjobs.in/
5- http://www.itsmyascent.com.
6- http://www.monster.com
7- http://www.timesjobs.com

Hope that helps you in your job search.
Feel Free to post more queries.
Thanks & Best of Luck!!