Hi Srilatha

In Andhra Pradesh Post Graduate Engineering Common Entrance Test (AP PGECET) merit ranks will be allotted  only for candidates who meet the qualifying percentage marks of 25% (30 marks out of total 120). However, There wil be no minimum qualifying marks for ranking for students from SC or ST categories. 

For futher details, please check:

https://engineering.careers360.com/articles/ap-pgecet

Best Wishes!