Mechanical Engineering

Aerospace engineering is very specialised branch. Obviously, placements sometimes are tricky. Mechanical engineering is evergreen and placement is almost always assured.

You have done graduation in mechanical engineering and are desirous of doing your PG in different subjects. For PG in a particular subject there is distinct eligibility criteria and one can't pursue PG in unrelated topic. You can download brochure from your prospective institutes webpage for details.

Kindly visit this link
https://www.shiksha.com/college-predictor

Kindly visit this link
https://www.shiksha.com/college-predictor

You have to apply as foreign candidate in exam forms. Cost may be high for foreign nationals as compared to indian students. Mechanical engineering fee varies from college to college. If you are looking for government college, it may cost 20 k - 6 Lacs rupees. For private it may cost 5 - 10 Lacs. I will suggest you to give exams like JEE Mains for getting good government college.

Your marks in Diploma & B.Tech is good and above minimum requirement i.e. 60 %. Make sure you are eligible in other criteria also like age, martial status, etc.

BE or B-Tech in mechanical engineering with at least 50% aggregate. Some colleges may require 60%.

Graduation (min 3 years) in any discipline with min 60% marks and have passed Maths and Physics as subject at 10+2 level B.E/ B.Tech from a recognised University with min 60% marks. Age Limit : 20 to 24 years
These are the eligibility criteria.

Yes, there are some government / private colleges in India which provides part/distance time education. Like Anna University etc.