Engineering Entrance Exam

It's not about college but it's about the field in which you are interested. Talking about college wise, go for NIT Warangal.

Yes, it is a good branch. But opt for metallurgy only if you are interested in this field.

Dear friend, please refer NIT-Warangal official website. They have provided opening and closing rank of each department as well as per quota. By referring that you can expect your admission chances. Please don't consider that cutoff will be same for this year too. It changes every year, but there is not much difference.
All the best.

You can check your college.
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

I think so, if you want to devote one more year for JEE, then only. If you have a strong will power, then only try for it. Otherwise, it will waste your prestigious 2 years and you will have a regret of lifetime. Please let me know how are your studies going on? Are you not able to study well or unable to concentrate? Have you registered for any coaching institute droppers batch. Then, I may help you in letting know of how to get you through the exams and out of wits.

As you belong to OBC category, just go and do counselling, you may get some IITs. Hope you get it. All the best.

In 2017, the cutoff of NIT is around 20k.

Yes, it is still a matter of discussion, as CBSE gives a clue about this idea. I think this idea will not be succeed as number of candidate will be larger and too much money will be spent on it. After all nothing can be said. Be prepared.

Nit colleges can be regarded as best choice but only some colleges offer pure sciences so refer to cut off ranks and decide which is better.you can also choose some universities which consider jee main rank