Diploma

Hi,To answer your query, it solely depends upon one's own interest. Some options are:
1. You can appear in Bachelor's degree after passing Respective state CET's.
2. You can further study and try scoring good marks in LEET.
3. You can join in a job which let you economically strong to a limit.
4. You can write various competitive exams with Diploma qualification and can secure a decent career.
5. You can join any apprentice programme and can enhance your skills.
It solely depends on Various factors of one individual and one's own interest. Hope this helps you.

After completing Diploma in mechanical engineering, you can apply for Bachelor in Aeronautical Engineering. You can apply for this course in HAL (Hindustan Aeronautics Limited ), Ozhar, Nashik.

https://www.shiksha.com/medicine-health-sciences/dietics-nutrition/colleges/diploma-courses-india
Check out this link.

That would depend on the college offering the programme. You have not mentioned the name of any colleges. Your eligibility into any programs in India would be on the basis of guidelines laid out by UGC.

It is never too late to start something, but now doing a B.Tech degree will do you no good. Instead use the experience that you have gathered over the years to acheive big. Else, you can join any college for B.Tech.

Yes, a Diploma student can give the joint entrance exam test for studying engineering. But since you have done Diploma you can choose a path according to what you have done, or else do engineering as per your choice.

Yes, there are many colleges for that. You can get lateral entry in B.Tech after your Diploma. Good luck.

Hi,
After Diploma, you can go with degree level courses or PG Diploma programs. B.Tech degree can be obtained with specialization in Automobile Engineering or Automobile design Engineering. Admission to the course can be done through lateral entry and thereby you can save one year. Post Graduate Diploma in Automobile Engineering is also suitable for you. Or else you can try for a job with railways, defense, government departments etc.

Here are the complete details about the IMUCET:
https://www.shiksha.com/university/indian-maritime-university-Chennai/imucet-exam
Kindly follow the link to get all the official information.