Hello Dear,

There are two kinds of caste certificate one is issued by Central government and other by state government. If you have a central government OBC certificate then it is applicable in Delhi technological university (DTU). OBC certificate can provide you benefits in many examniation but now a days the cutoff for general and OBC are almost same,  for availing the benefits of obc category, one have to produce to obc ncl certificate. Also note that, obc category certificate is only valid for one year.

Good Luck