Dear Laksman, once you complete your B.Tech in Mechanical Engineering, go to the official webiste: http://dgshipping.gov.in/index.aspx and check for RPSL list. There are few shipping companies that run their own Institutions while few shipping companies that run the course and let other Institutes hire their candidates. Now you either can reach out to each company or wait for an official notification from these companies.
Candidates can check B.Tech Cut off for Top IITs & NITs here.
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