Mechanical Engineering

Yes you can pursue B.E. or B.tech in Aeronautical Engineering after completing diploma in mechanical engineering and you can get admission through lateral entry programs in colleges which offer this course. Aeronautical Engg is somehow related to mechanical Engg and it's is also a good option to look as a career.

The best, first and foremost is IIT. Then comes Bits pilani. Then there are colleges like DTU, Manipal, VIT Vellore, IPU etc.

Hi Swapnil
While I appreciate your enthusiasm for starting a business of your own, but before that you must hv a plan and knowledge of your own skill set and interests. I would suggest you to take few internships to understand an organisation and its departments. Once you have the experience, you may decide better.

This is a very subjective question and depends entirely on your aspirations. There are many post graduation courses in India and abroad. The most commonly pursued ones are MBA and MTech (called MS outside India in many countries). You have to figure what career path best suits you based on your interests, aspirations and calibre to decide which course you should take next. You can find out about a lot courses on https://Shiksha.com. All the best.

Dear vismya you can go in various mechanical companies.you can even get in automobile industry.even in production industry,PSU etc.just select some reputed college for the bachelors.
best of luck.

India has multiple good enginerring college for Mechanical Engineering. However , if your long term objective is to settle in Australia then doing Engineering degree in Australia has following advanages: (a) Quaility Education (b) Ease in getting job in Australia (c) Ease of getting PR (d) Cultural integration and acceptance by locals.