Before beginning with the answer, you should know that the score you have got is quite good and there are chances of you to get a seat in NIT Trichy. 

Here’s the process of NIT Trichy:

• Firstly, it is close to impossible to get a seat in CSE during the primary counseling of CCMT. 
• Moreover, the spot round can provide you with a seat for CSE Information Security in NIT Warangal. 
• Furthermore, after enrolling you have an option for internal sliding rounds in which there is a probability of getting a seat in the CSE branch. 
• If not that, then the college itself will release the number of seats on the website for the students who are still interested in enrolling.

On the other hand, there is a high possibility that NIT Warangal also has the same procedure but my brother wasn’t sure about it.

Welding technology has the distinct advantage of having some organizations who come to NIT Trichy solely to hire welding masters. In core welding firms, more than 50% placement is guaranteed. During the placement process, many software and mechanical firms visit the campus. 

• According to the recent placement highlights, the placement average for Welding Technology was around 60%. The placement average is less this year due to the ongoing pandemic. 
• The average CTC offered in the placement is 7-9 LPA. 
• The major recruiting companies that visit the campus are Tata Steel, Caterpillar, Lincoln, etc. NDT companies also recruit from Welding. If you have the required skills you can also sit for software and data science roles. 
• Almost 60% of the branch get placed in Mechanical core while the remaining 40% get placed in sectors like software, marketing, etc.

If you have good CGPA and decent communication skills then getting into core sectors from Welding Engineering at NIT Trichy will not be that difficult.

I would suggest you go for metallurgy if you plan to do a job right after completing your degree. Metallurgy has more job opportunities to offer. With Metallurgy, you can easily learn coding and go for tech companies. NIT Trichy has a great coding culture, so picking up coding skills will not be difficult. 

If you plan to prepare for civil services or any other government job, I would suggest you go for civil engineering.

When compared to metallurgy, there are fewer job opportunities in the civil department.

If you plan on doing an MBA after having done your engineering, you can opt for either of them because then it does not matter anyway.

You should give preference to courses rather than the college. It is necessary to know about them beforehand. I can provide you a brief idea about each of the courses so that your choice becomes a little easier.

1. Chemical Engineering involves chemistry, physics, mathematics, and even economics. You can also check the course curriculum of the courses at some institutes such as IIT Bombay.
2. ECE is not just about circuits, semiconductor electronics, and Integrated Circuits. It involves a lot of mathematics such as calculus, functions, probabilities, and complex numbers. It also involves coding. If you are not very familiar with coding, you can do some free courses from Coursera, edX, MIT OCW, etc. before starting the course.
3. CSE will involve lots of coding. Also, the placements in any college generally tend to be better than in other branches. So you may consider CSE for that as well.

If you want to do CSE or ECE, then BITS Pilani would be an excellent choice. For Chemical Engineering, IIT Bombay is a very good choice. 

NITs generally are very good in core branches and for CSE and ECE they may not be a very good choice as the faculty is not good. 

The basic amenities that you will be found on the campus of NIT Trichy are as follows:

1. A 24x7 computer center with a high-speed internet facility where you can serve the internet all the time.
2. A Gym is also available on the campus.
3. A Sports Center is also available on the campus. Various types of grounds like NSO, CEESAT, and JADE grounds are also available.
4. Apollo hospital well equipped with an ambulance facility is also available on the campus.
5. Various kinds of Shopping complexes, Printout shops, tailor shops, salons, Juice shops, etc are available on campus.
6. An SBI Branch inside campus along with 3 ATMs are there in the campus area.
7. Various types of eating outlets, laundry shops, photo studios, mobile accessory shops, and a post office are also available near the campus.

Other than the above-mentioned facilities on the campus, the following things are also available on the campus:

1. A fully dedicated GMAT center at the computer annex.
2. German level A1 class facility is also available.
3. You will also be getting a driving license with the training of 4 wheeler & Passport on the campus.
4. You will also find CAT classes(IAS classes were also offered earlier, not now probably)

These are some of the amazing facilities students are provided at NIT Trichy.