To have a concrete preparation you need to have a clarity of the question asked in the exams and the pattern of the exam. Practicing previous year exams will give you such experience. Now apart from that you can go for the model papers. This model papers have varied questions related to BHU entrance which will certainly help you to score a good marks.

To download the sample papers for BHU UET visit the link below:

https://university.careers360.com/articles/bhu-uet-sample-papers

I hope my answer helps. All the very best for your future endeavors!