The admissions are done on the basis of Jee main and once you get the required score then you will have to attend the JAC Delhi counseling. Also, the counseling session for 2018 will be starting in the month of June tentatively as the dates are not yet declared.

To know more about its eligibility and counseling process you can go through the below link -

https://engineering.careers360.com/articles/jac-delhi-eligibility-criteria

https://engineering.careers360.com/articles/jac-delhi-counselling

Good Luck!!!