Hey,

Well, it depends on a lot of things, your category and in which branch you want to do your engineering, how much marks you scored in Intermediate Exams and all, for a general category candidate the rank which ensures an engineering seat in JNTUK as follows (rounded of nearest figure)

EEE-800

ECE-1100

CIVIL ENGINEERING-600

MECHANICAL ENGINEERING-900

CSE-1500

PETRO CHEMICAL ENGINEERING- 15000.

Hope I solve your query.

All the best!!!