Diploma

Hi Mani, PG Diploma programs in mechanical engineering is difficult to find in Canada. PG Diploma is suitable if you are looking for a fast track career option, mostly based on practical courses and applications. MS programs are research oriented, if you want to get into RnD MS is suitable for you.

Yes, you can, but be assured about the course and check if the college is affiliated under good university.

Yes, you can join Diploma course after 10th if you're very creative.

Are you going to change your branch after completing Diploma. I think you have no interest in mechanical field. It's not mandatory to jump into the same industry. There are wide options available for them. You can analyse your personality and can move into some different career path according to you

With this course, you can get jobs in the travel companies such copx and kings, makemytrip, etc. There, you may join ticket booking, itinerary development or package planning departments for starters.

Do B.Tech in mechanical instead of petroleum because you have some practical knowledge about the subject which is useful.