Hello Shubham,

To get admission in B.E./B.Tech in marine engineering one has to appear for either one of the exams listed below -

• Indian Marinetime University Common Admission Test ( IMU )
• HIMT Online entrance test
• IIT JEE
• JEE Mains 

Now the admission process differs from institute to institute. There are around 60 colleges in India those who offer marine engineering. Some of the best are given below -

• Indian Maritime University
• Tolani Maritime Institute
• Academy of Maritime Education & Training
• Samudra Institute of Maritime Studies
• Hindustan Institute of Maritime Engineering

Here is the link you can go through to check the other maritime colleges : https://engineering.careers360.com/colleges/list-of-marine-engineering-colleges-in-india

If you want to get admission to some of the best colleges in marine engineering then it can be a little bit difficult based on your JEE percentile. If you have given the other entrance exams for marine engineering the based on that score you can get admission in that particular college.

Hope this helps you. 

Good Luck !!!