Hey aspirant !  Yes jee mains is sufficient

As you are from obc category , and willing to take admission in HBTU (formerly known as HBTI )  2019  cutoff of HBTU is not yet declared  so we have to understand the concept from last year's data 

So from the last year(2018) cutoff  of HBTU  

The following data is obtained with the help of which you can get a clear idea of your admission in HBTU.

The opening and closing rank of various branches for OBC category are given below of HBTU

Bio chemical engineering  opening (42231) to (54958) closing 

Chemical engineering (30665) to (38179)

Civil engineering (33747) to(37246)

Computer science and engineering (19044) to (30400)

Electronics and communication (30511) to (36454)

Electrical engineering (29097) to (32904)

 These are the opening and closing ranks of some branches of HBTU 

Since your rank is 33k so you can expect your admission in various branches depending upon your interest 

Best of luck