hi,

see candidates who have completed master degree on equivalent qualifications from a recognized university are eligible to participate in ugc net, general candidates need to secure 55% marks in pg , for sc/st candidates marks criteria is 50%, Candidates securing degree from recognized universities in Humanities (including languages), Social Science, Computer Science and Applications, Electronic Science etc. are eligible for this test. ugc net is important for science and humanities students, but if you have mtech in cse you may find relevant subject, however  there is no subject relevant with civil engineering,

you may follow the below link to know about subjects in ugc net,

https://ugcnetonline.in/subjects.php

subjects may relevant to you since you have engineering background,

computer applications,

electronic science