I got 5082 rank in all over India & 1793 rank in obc category in nimcet . Am I eligible to take an admission in hbtu for mca

Well Arti you are having nit so good rank in NIMCET  which is 5136 in general category and 1599 in OBC category. 

With this rank it is possible that you will get nit Agartala or Raipur. And also there are other colleges which you can get . One of them is HBTU Kanpur . It is possible that with your OBC rank you will get a seat in HBTU Kanpur. 

All the best.