According to official website of cbit you cannot get admission there on the basis of icar score as it accepts admission on basis eamcet rank and talking about nit warangal so it is an institute of national importance and is under the central government of india and admission to it on btech level are strictly done through josaa counselling on the bass of jee main rank once you get a valid jee rank you can sit in josaa counselling and then on the basis of your rank and preference order you get a seat allotted if any in nit warangal