The required rank depends upon your preferred branch and preferred campus. There are two campuses one is SOE and other is CUECK campus. The main campus is SOE campus. So generally Students prefer SOE campus over CUECK campus. I am giving you a approximate figure of the rank required to get admission in various branches

Fire and Safety- 800

Cs-800

Mechanical -1200

Civil-2000

IT-1800

ELECTRONICS-1800

These are the approximate figure which may vary according to the interest and demand of the student. These figures are for main campus.

Hope this helps!!