IMU Chennai Indian Maritime University (IMUC)

If general category, then no. If OBC, then yes in B.Sc. Nautical Science.

Every college has its own brand value, but among these two I will suggest you to choose Indian Maritime University.

You need to appear for IMUCET exam to get into IMU for which you need to have minimum 60% in class 12th PCM.
For details, check the link below:
https://www.shiksha.com/university/indian-maritime-university-Chennai/exams/imucet

For merit list in IMU, Chennai or Cochin, you must score above 95%. According to last year's records, you must have above 95% for getting your name in the merit list.

No, MHT-CET is the competitive exam conducted by DTE-Maharashtra to get admission in technical institutes which are governed by Maharashtra State Government. Indian Maritime University is in Chennai. So, irrespective of branch, MJT-CET score is not to be validated for admission in this university.
All the best for future.

Yes, it's really good to do MBA in IMU if you want to start your career in shipping or maritime industry. The MBA in IMU not only helps you understand the port industry along with the operations handled in port industry and the logistics too. Being a student of marketing I am doing my internship in Adani ports and SEZ. Talking about the salary, the IMU provided good package too. So, I must recommend MBA From IMU.

First, you have to choose a course and write IMUCET entrance examination. If you qualify it then you are eligible to take admission either in any of the IMU campuses or any of its affiliated ones.