MBA/PGDM

NIFT results are expecting by May end and CAT results for 2016 have been out already. You can prepare for CAT 2017 to take admission in the academic year of 2018-19.

As per AICTE norm itself, the minimum percentage for MBA admission is 50% in graduation. Please note that every MBA does not get a good job even for a known but not ranked institute in Mumbai, people hardly get a salary of rupees 12000 monthly.
Please read the following:
www.bit.ly/10hr9hJ
It may give you enough clarity.
Better, I suggest you to search for a job and later on, pursue part time/executive MBA from a good institute.

ASM Delhi, Amity Noida, Asia Pacific Delhi, Fortune Institute are some great names.
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-delhi/ncr-accepting-mat/2-2-0-10223-306

ICRI is very well recognised brand for Healthcare Management. 80% placements and 4.5 LPA is the average salary.
http://icriindia.com/mba-in-hospital-and-healthcare-management/

Difficulty level is medium, you need to be abreast with all latest current happening and controversies as well as good GK is must. You can prepare on your CV, your background details, technical knowledge, about work experience, about XIME and reason to join, hobbies, strengths, weaknesses, and little basics about management.

Amity Noida, FIIB, ASM Delhi and Asia Pacific Delhi are some key colleges where you must try out. You can also try out and check MDI Gurgaon, although, the cutoff maybe high.

You can give exams like CAT, MAT, XAT, CMAT, GMAT, etc.

You may refer to following link for list of top MBA colleges in India based on MAT score: https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india-accepting-mat/2-2-0-0-306

You can do Ph.D in specialised field for teaching and research in the field of Hotel Management.

Hello,
Here is the list of some short term courses you can opt while pursuing B.Tech in Mechanical Engineering:
Auto CAD
Piping - Stress Analysis
Patent Claims Drafting
Computer Aided Manufacture
Tool Design
CNC Machining
Refer to the below link to know about institutes offering related courses:
https://it.shiksha.com/cae-cad-cam-courses-in-india-categorypage-10-107-1-0-0-1-1-2-0-none-1-0
Refine the search as per your state preference.
Hope this helps,
If you like this answer rate it as the best answer.
Thanks.
All the best