Colleges in Rajasthan

All of the 3 colleges which you mentioned are the technical institutes providing best of the technical exposure to there students and know-how. These institutes does have management programs but are average in providing you with any good management skills and exposure. They will give you placement but the company might not be of your core MBA specialisation (Marketing, HR, Finance etc. ). So in my opinion opt for a good Business School for the MBA course.

JK Lakshmipat University does not provide an integrated B.Tech and MBA degree. However, the B.Tech programme at JK Lakshmipat University is a redefined programme in line with the innovative and future-ready technologies running the world. With a multidisciplinary pedagogy designed by the #3 in the US, Olin College of Engineering, JK Lakshmipat University focuses on project-based learning. With the current internships and placements in organisations like BARC, Bonn, Airports Authority of India, Paytm, and more, B.Tech from JKLU opens a sea of opportunities to students in their desired domain.

You can take there entrance or can apply through JEE Mains. If you perform well in this then you can get admission in BITS. Good luck.

BITS Pilani is one of the premier institute of India. If you want to pursue your Masters from BITS then your decision won't go wrong. Placement is good enough. You will even get a tag name of BITS Pilani which matters a lot. All the best. Placement is good for mechanical too.

My batch and my senior 's batch have good placement companies like HDFC, infosys icici. We have the world -class facility in our college. They are highly Qualified have also worked in industry. They faculty use case-based methodology to teach the student.

Check out the link below for eligibility :
https://www.shiksha.com/engineering/course/ph-d-in-civil-engineering-shri-jagdishprasad-jhabarmal-tibrewala-university-rajasthan-other-310241

Hi Deepak,
IIT, Roorkee is a good institute for research and if you wish to pursue here you should go for it but wisely choose your guide under which you want to continue research. This you can do by talking to students already doing research there which will help you in choosing right guide. Also, IIT Roorkee has many research facilities.
Good luck.