Dear Sneha, it's very hard to provide previous paper of DBATU university.

But due to some research i found some link of previous year paper of civil engineering

for survey exam http://bamuengine.com/wp-content/uploads/2019/02/Survey-I181_ND-18.pdf

http://bamuengine.com/question-papers/civil-question-papers/

The above link contains all subject previous year paper.