Your rank might be around 220000 which is not enough to get NIT Warangal . If you are SC /ST , then you might get some branches from the quota. But it is impossible that you get NIT Warangal with such rank . For General Category who want admission in NIT Warangal , they should get at least a rank of around 18000 i.e percentile around 98.2 percentile. You can use our College Predictor to know colleges which you might get .
I am sorry but 78 percentile is too low to get you a seat at NIT Warangal if you are general candidate. If you have have reservation quota of sc/st then you may have a otherwise. But otherwise, you have no chance. You need at 96+ percentile for a general candidate to get into NIT Warangal.
I hope this answer will help, all the best for the future!!